JP2011188193A - Recording/reproduction device, and recording/reproduction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording/reproduction device and a recording/reproduction method which efficiently record a plurality of recording data, such as image data, sound data and other data, on a recording medium, and easily extract related data when viewing data. <P>SOLUTION: In the recording/reproduction device and the recording/reproduction method, recording data, such as encoded image data, sound data, data generated by other external devices, and data linking mapping data are continuously recorded into a data area in a unified packet structure. In the mapping data, a plurality of data are mutually linked, and the linked target data are dynamically changed based on device location information and time information. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a recording / reproducing apparatus and a recording / reproducing method suitable for monitoring applications.

  When recording a video signal in a conventional recording / reproducing apparatus, a method of encoding a video signal input from a camera or the like and recording it on a recording medium such as a hard disk or an optical disk is generally used. For example, in the case of an application that requires long-time recording such as a monitoring application, an intra-coding technique such as JPEG (Joint Photographic Experts Group) that reduces the data size by utilizing spatial redundancy in a frame. In addition, a method of recording data using an inter-coding technique such as MPEG (Moving Picture Expert Group) that further reduces the data size more efficiently by using temporal redundancy between frames is widely used.

<< First Prior Art >>
In a recording / reproducing apparatus, it is important that long-term data can be recorded. In order to record data for a long time, it is important how efficiently recording data is recorded on a recording medium having a finite capacity. Generally, a recording medium includes a data recording area in which recording data aligned (sector aligned) in recording units is recorded, and a management data area in which management data for managing the recording data in the recording units is recorded. Have Since the capacity of the recording medium is finite, in order to record a large amount of recording data, the management data area may be reduced and the data recording area may be increased. In order to reduce the management data area, for example, the size of the recording unit may be increased to reduce the number of recording units of the recording data to be managed. However, if the recording data whose data size is indefinite data length is aligned in a large recording unit, in the alignment at the end of the recording data, only a part of the recording unit is used, so that the most part is used. In this case, a data recording area where no data is recorded appears, and the recording data is not efficiently recorded on the recording medium. On the other hand, if recording data of indefinite data length is aligned in small recording units, the data recording area can be used without waste, but the number of recording units of recording data to be managed increases, so the management data The size of the area increases, and the recording data cannot be efficiently recorded on the recording medium.

  In addition, for example, a recording / reproducing apparatus for monitoring is installed for recording video or audio in an elevator, a store, a transportation facility, a factory, and the like, and is used for crime prevention or monitoring of equipment (detection of an abnormal situation). . In addition, in monitoring applications, not only video signals and audio signals but also external device data that is control data indicating the operation status of the elevator, etc. is recorded, and this external device data is used in the event of an accident or failure. . For example, if any accident or abnormality occurs in the monitored equipment, the administrator analyzed the detailed status of the equipment using external equipment data and recorded the situation at the time of the accident or abnormality. Check with video or audio. In the conventional recording apparatus, since the video data (or audio data) and the external device data are managed independently, the administrator can individually check the video data (or audio data) and the external device data in the confirmation work. It was necessary to perform a search, and the search took time and effort.

<< Second Prior Art >>
In order to efficiently record data and improve data retrieval performance, there is a proposal of an apparatus that associates data by describing relevant information in the header of each video data (see, for example, Patent Document 1). . Patent Document 1 discloses an apparatus that associates video data with POS operation information of a retail store. This apparatus associates video data with POS data by describing POS processing content identification information in the header of the video data. In this apparatus, in order to save the recording area of the recording medium, the user sets in advance whether or not to perform recording for each POS processing content identification information, and when the recording is performed, the POS of the set POS is set. By recording video data only when processing is performed, the recording area of the recording medium is saved.

<< Third Prior Art >>
Patent Document 1 also proposes a method of creating an execution record table that indicates the correspondence between time data and POS processing content identification information, as well as recording date / time information to video data. As a system adopting a similar method, a system that associates video data and control data by giving absolute date and time information (time information) to both video data and control data has also been proposed (for example, Patent Document 2). The system disclosed in Patent Document 2 acquires common absolute time information using a radio clock in a device for recording video data and recording control data, and uses the absolute time information for each of video data and control data. Is associated with the video data and the control data.

JP 2003-331365 A (page 5, FIG. 3, FIG. 4) Japanese Patent Laying-Open No. 2007-235668 (page 22, FIG. 1)

  However, in the first prior art, when data is recorded, video data and other data are recorded separately in different areas of the recording medium, so that each data recorded in different areas can be read out. There was a problem that the writing process took time. For example, when simultaneously reading out and displaying video data of a plurality of channels generated at the same time and external device data related thereto, it is necessary to read out the respective data from different locations on the recording medium. When a hard disk is used as a storage medium, there is a problem that it takes time to read because the process of moving the read head to the read position frequently occurs. Also, when recording data, it is necessary to write video of multiple channels and related data to different locations, and similarly, it takes time to move the head. There was a problem that the recording ability such as the number was limited.

  In the second prior art, in order to increase the recording efficiency, in an apparatus that records video only when the user performs a specific operation, video data is not recorded when the designated operation is not performed. No video remains unrelated to a specific operation. Therefore, the recording data by such a device is not useful for recording an accident or the like that occurs when the designated operation is not performed. In addition, the second conventional technique cannot increase the recording efficiency in an application where it is desired to perform video recording that is not related to a specific operation.

  In the third prior art, video data and other data are associated with each other via time information. Therefore, information generated at the same time is simply collected, and the data are individually associated with each other. There was a problem that we couldn't. For example, in recording for monitoring purposes, it is generally performed to simultaneously record a plurality of videos, a plurality of sounds, and a plurality of external device data. Even if the related video is only the video from some of the plurality of cameras, it was not possible to select only the camera that shot the related video and associate it with the external device data. More specifically, if a video related to certain control data is to be viewed, the video generated at the same time can be known, but the user can check the video because it cannot be associated with each camera. In this case, it is necessary to manually select a required camera from among all the cameras and switch the display. In addition, this association is not always fixed, and when the association dynamically changes due to movement of the camera or the like, the confirmation work by manually switching requires a lot of labor.

  Therefore, the present invention has been made to solve the above-described problem, and can efficiently record a plurality of pieces of encoded data in association with each other. From the plurality of pieces of encoded data thus associated, It is an object of the present invention to provide a recording / reproducing apparatus and a recording / reproducing method capable of selecting related data and reading them at high speed.

  A recording / reproducing apparatus according to an aspect of the present invention acquires encoded data and common date and time information, and generates a control information related to the data, and the data includes a predetermined data range. Adding a header having the control information, generating a first data processing unit for generating a plurality of first packets of indefinite data length, and generating mapping data indicating an association between the plurality of first packets, A header having the control information is added to the mapping data to generate a second packet, and a plurality of data packets including the plurality of first packets and the second packet A recording medium having a management information generating unit for generating management information, a data recording area in which the plurality of data packets are recorded, and a management data area in which the management information is recorded A recording unit that records the plurality of data packets and the management information; a data extraction unit that reads the plurality of data packets recorded in the data recording area based on the control information and the management information; A decoding unit that decodes the plurality of data packets that are output, and each of the control information of the plurality of data packets includes ID information that identifies a type of data included in the data packet including the control information; It is characterized by having date and time information indicating the date and time when the data packet including the control information was recorded, and size information indicating the data size of the data packet including the control information.

  A recording / reproducing method according to another aspect of the present invention is a recording / reproducing method executed by a recording / reproducing apparatus, which obtains encoded data and common date / time information, and generates control information related to the data. A step of adding a header having the control information to the data for each predetermined data range to generate a plurality of first packets having an indefinite data length, and an association between the plurality of first packets Generating mapping data, adding a header having the control information to the mapping data to generate a second packet, and a plurality of first packets and a plurality of second packets Generating management information of the data packet, a data recording area in which the plurality of data packets are recorded, and a management in which the management information is recorded Recording the plurality of data packets and the management information on a recording medium having a data area, and the plurality of data packets recorded in the data recording area based on the control information and the management information. A step of reading and a step of decoding the plurality of read data packets, wherein each of the control information of the plurality of data packets specifies a type of data included in the data packet including the control information ID information, date / time information indicating the date / time when the data packet including the control information was recorded, and size information indicating the data size of the data packet including the control information.

  According to the recording / reproducing apparatus and the recording / reproducing method of the present invention, it is possible to efficiently record encoded data in association with each other, and select related data from a plurality of encoded data thus associated. There is an effect that it can be read out at high speed.

1 is a block diagram schematically showing a configuration of a recording / reproducing apparatus according to Embodiments 1 to 8 according to the present invention. FIG. 3 is a diagram illustrating a configuration of a data packet in the recording / reproducing apparatus and the recording / reproducing method of the first embodiment. It is a figure which shows the recording medium provided in the data storage part shown by FIG. 1, and the recording area on this recording medium. 6 is a diagram showing an example of a data packet recorded in the recording / reproducing apparatus and the recording / reproducing method of Embodiment 1. FIG. It is a figure which shows the example of ID information shown by FIG. It is a figure which shows the example of the structure of the mapping data shown by FIG. It is a figure which shows an example of the installation condition of the camera which produces | generates a video signal in the recording / reproducing apparatus and recording / reproducing method of Embodiment 2 and 5 which concern on this invention. 6 is a diagram illustrating an example of dynamic data association in the recording / reproducing apparatus and the recording / reproducing method of Embodiment 2. FIG. It is a figure which shows an example of the installation condition of the camera which produces | generates a video signal in the recording / reproducing apparatus and recording / reproducing method of Embodiment 3 which concerns on this invention. It is a figure which shows an example of the installation condition of the camera which produces | generates a video signal in the recording / reproducing apparatus and recording / reproducing method of Embodiment 4 concerning this invention. It is a figure which shows an example of the dynamic data correlation in the recording / reproducing apparatus and recording / reproducing method of Embodiment 5 which concerns on this invention. It is a figure for demonstrating the forward direction pointer and reverse direction pointer in the recording / reproducing apparatus and recording / reproducing method of Embodiment 6 which concern on this invention. It is a figure which shows the data structure and pointer packet of a data recording area in the recording / reproducing apparatus and recording / reproducing method of Embodiment 7 which concern on this invention. FIG. 25 is a diagram showing pointer packets in the recording / reproducing apparatus and recording / reproducing method of the seventh embodiment. FIG. 25 is a diagram illustrating individual divided section minimum date and time information and divided section maximum date and time information in the recording / reproducing apparatus and the recording / reproducing method according to the seventh embodiment. FIG. 25 is a diagram illustrating divided recording areas grouped in the recording / reproducing apparatus and the recording / reproducing method of the seventh embodiment. FIG. 25 is a diagram for explaining data search in a data management area in the recording / reproducing apparatus and recording / reproducing method of the seventh embodiment. FIG. 25 is a diagram illustrating pointer information to mapping data in a management data area in the recording / reproducing apparatus and the recording / reproducing method according to the seventh embodiment. It is a figure which shows the data structure of the data recording area in the recording / reproducing apparatus and recording / reproducing method of Embodiment 8 which concerns on this invention. It is a block diagram which shows roughly the structure of the recording / reproducing apparatus of Embodiment 9 which concerns on this invention.

Embodiment 1 FIG.
FIG. 1 is a block diagram schematically showing a configuration of a recording / reproducing apparatus 1100 according to the first embodiment of the present invention (that is, an apparatus capable of performing the recording / reproducing method of the first embodiment). As shown in FIG. 1, the recording / reproducing apparatus 1100 includes video input units 2 and 3, video encoding units 4 and 5, an audio input unit 6, an audio encoding unit 7, and a data multiplexing unit 8. A control information generation unit 9, a data recording unit 10, and a data storage unit 11 having a recording medium 11a. Further, the recording / reproducing apparatus 1100 includes a control information reading unit 12, a management information generating unit 27, a management information reading unit 28, a data reading unit 13, a data separating unit 14, video decoding units 15 and 16, video Output units 17 and 18, a voice decoding unit 19, and a voice output unit 20 are provided. Furthermore, the recording / reproducing apparatus 1100 includes an external information input unit 21, an external information encoding unit 22, an external information decoding unit 23, an external information output unit 24, a mapping data generation unit 111, and an output timing control unit 112. The position information acquisition unit 113 and the individual time information extraction unit 114 are provided. Note that FIG. 1 shows only a main configuration among a configuration provided as a part of the recording / reproducing apparatus 1100 and a configuration directly connected to the recording / reproducing apparatus 1100. Therefore, for example, a command input unit that is operated by the user to specify start and stop of recording, a state display unit that displays the state of the device, and data that temporarily stores data in image encoding and decoding processing A temporary storage unit, a control unit that controls temporarily stored data, and a display device that displays an image based on the output image signal are not shown in FIG.

  A video signal output from a video signal generation unit (not shown) such as a camera is input to each of the video input units 2 and 3. A video signal of channel number 1 (Ch-1) is input to the video input unit 2, a video signal of channel number 2 (Ch-2) is input to the video input unit 3, and the recording / playback apparatus 1100 A total of two channels of video signals are input. The video encoding units 4 and 5 receive the video signals input to the video input units 2 and 3, respectively, and encode the received video signals to generate video data. However, the recording / reproducing apparatus 1100 may be configured such that video signals of three channels or more are input.

  The audio input unit 6 receives a 1-channel audio signal output from an audio signal generation unit (not shown) such as a microphone. The audio encoding unit 7 receives the audio signal input from the audio input unit 6, encodes the received audio signal, and generates audio data.

  The external information input unit 21 receives an external device data signal generated by an external device (not shown). The external information encoding unit 22 receives the external device data signal input to the external information input unit 21, encodes the received external device data signal, and generates external device data. The external device is, for example, an elevator control device (shown in FIG. 7 to be described later) or a POS terminal control device, and the external device data generated by the external device is, for example, the operation of the elevator car generated by the elevator control device. Information, operation information of a POS (Point Of Sales) terminal, and the like. Note that the video encoding units 4 and 5, the audio encoding unit 7, and the external information encoding unit 22 are collectively referred to as an encoding unit 1101. Note that, when encoded data is input, the encoding 1101 may not be provided.

  The management information generation unit 27 generates management information related to data recorded in the data recording area 11c (shown in FIG. 3 described later) of the recording medium 11a in the data storage unit 11.

  FIG. 2 is a diagram showing the configuration of the data packet 40 in the recording / reproducing apparatus 1100 and the recording / reproducing method of the first embodiment. As shown in FIG. 2, the data multiplexing unit 8 adds an access control header 30 (horizontal line hatching area) and a mapping information footer 36 (shaded hatching area) to the recording data 41 to generate data with an indefinite data length. A packet 40 is generated. The access control header 30 has control information of the same information item regardless of the type of data such as video data, audio data, other data (such as mapping data) other than video data and audio data, and external device data. It is a common header. The data multiplexing unit 8 sequentially generates the data packets 40 and multiplexes the plurality of generated data packets 40. The multiplexed data packet 40 is recorded in a data recording area 11c (shown in FIG. 3 described later) of the recording medium 11a.

  The recording data 41 of the data packet 40 includes at least one of video data obtained by encoding a video signal, audio data obtained by encoding an audio signal, other data (such as mapping data), and external device data. . In the first embodiment, as shown in FIG. 4 to be described later, the recording data 41 (reference numerals 42, 43,... 51 in FIG. 4 to be described later) includes 2-channel video data and 1-channel audio data. Either mapping data or external device data is recorded. In the present application, when video data, audio data, other data, and external device data are not distinguished, they are referred to as recording data.

  The access control header 30 of the data packet 40 has the same information item regardless of whether the recording data 41 is video data, audio data, external device data, or mapping data (however, the information item The content may be different or common for each data packet 40). Information items of the access control header 30 include control information 31, 32,..., 35 used for control to read out the data packet 40, specifically, ID information 31, date and time information (common) 32, size information 33, and forward direction. A pointer 34 and a backward pointer 35 are included. The control information generation unit 9 acquires encoded data and common date / time information (for example, common date / time information such as date / time information by a built-in clock), and generates control information related to recording data. The control information generation unit 9 gives the contents of the control information 31, 32,. However, the data multiplexing unit 8 may provide the control information 31, 32,..., 35 without providing the control information generating unit 9. The access control header 30 is added to the recording data 41 for each predetermined data range, and a data packet having an indefinite data length is generated. In the first embodiment, the data multiplexing unit 8 and the control information generation unit 9 add a header having control information to the recording data for each predetermined data range, and the data packet with an indefinite data length ( A first data processing unit that generates a plurality of (first packets) is configured. Further, in the first embodiment, the mapping data generation unit 111, the data multiplexing unit 8, and the control information generation unit 9 generate mapping data indicating an association between a plurality of data packets generated by the first data processing unit. A second data processing unit that generates and adds a header having control information to the mapping data to generate a data packet (second packet) is configured.

  The mapping information footer 36 (hatched area) of the data packet 40 is provided in the footer portion of the recording data 41. The mapping information footer 36 has a plurality of pairs of mapping IDs 38 that are IDs of mapping data packets and list numbers (# 1,..., #L) 39. The mapping information footer 36 includes information on the number of lists 37 indicating the number of pairs. Each information 37, 38, 39 in the mapping information footer 36 is generated by the mapping information generation unit 111, but each information 37, 38, 39 is given by the data multiplexing unit 8 without providing the mapping information generation unit 111. The recording / reproducing apparatus may be configured as described above. FIG. 2 illustrates the case where a configuration composed of a pair of one mapping ID 38 and one list number 39 is handled as one set of data, but a configuration composed of a combination of one mapping ID and a plurality of list numbers. It may be handled as a set of data.

  FIG. 3 is a diagram showing a recording medium 11a provided in the data storage unit 11 shown in FIG. 1 and a recording area on the recording medium 11a. As shown in FIG. 3, the recording medium 11a has a management data area 11b and a data recording castle 11c in which the data packet 40 is recorded. Management data for managing the data packet 40 recorded in the data recording castle 11c is stored in the management data area 11b. The data recording unit 10 shown in FIG. 1 continuously records the data packets generated by the data multiplexing unit 8 as data packets 40 in the data recording area 11c of the recording medium 11a. The recording medium 11 a may be detachable from the data storage unit 11.

  When the data packet 40 recorded in the data recording area 11 c is reproduced, the data extraction unit 29 including the management information reading unit 28, the control information reading unit 12, and the data reading unit 13 controls the access control header 30. Based on the information and the management information recorded in the management data area 11b, the data packet 40 recorded in the data recording area 11c is read out. In the first embodiment, the control information reading unit 12 searches for and reads control information that matches the desired control information from the control information of the data packet 40 recorded in the data recording area 11c. The data reading unit 13 reads the data packet 40 having the control information matched in the control information reading unit 12.

  Of the data packet 40 read by the data reading unit 13, the video data is sent to the video decoding units 15 and 16 by the data separation unit 14. The video decoding units 15 and 16 decode the video data read by the data reading unit 13. The video output units 17 and 18 output video data decoded by the video decoding units 15 and 16, that is, video signals.

  Similarly, in the data packet 40 read by the data reading unit 13, the audio data is sent to the audio decoding unit 19 by the data separation unit 14. The audio decoding unit 19 decodes the audio data read by the data reading unit 13. The audio output unit 20 outputs the audio data decoded by the audio decoding unit 19, that is, the audio signal.

  Similarly, in the data packet 40 read by the data reading unit 13, the external device data is sent to the external information decoding unit 23 by the data separation unit 14. The external information decoding unit 23 decodes the external device data read by the data reading unit 13. The external information output unit 24 outputs the external device data decoded by the external information decoding unit 23, that is, the external device data signal. The video decoding units 15 and 16, the audio decoding unit 19, and the external intelligence decoding unit 23 are collectively referred to as a decoding unit 1102.

  In the first embodiment, the video encoding units 4 and 5 describe the case where the video signal is MPEG-encoded, and the video decoding units 15 and 16 decode the MPEG-encoded video data. The video data is, for example, I-frame video data that can be independently decoded by the video decoding units 15 and 16, or P-frames that can be decoded by the video decoding units 15 and 16 depending on the I-frame video data. Video data. Also, the audio data can be decoded independently by the audio decoding unit 19, for example, and the external device data can be decoded independently by the external information decoding unit 23.

  FIG. 4 is a diagram illustrating an example of the data packet 40 recorded by the recording / reproducing apparatus 1100 and the recording / reproducing method of the first embodiment. In FIG. 4, the data recording area 11c is the same as or corresponds to that shown in FIG. “Ch-1” added to the video data 42, 44, 46 indicates that each of the video data 42, 44, 46 is video data obtained by encoding a video signal of channel number 1. “Ch-2” added to the data 43 and 48 indicates that each of the video data 43 and 48 is video data obtained by encoding a video signal of channel number 2. Further, “(I)” attached to the video data 42 and 43 indicates that each of the video data 42 and 43 is I-frame video data that can be encoded independently, and the video data 44, 46, “(P)” added to 48 indicates that each of the video data 44, 46, and 48 is P frame video data. In FIG. 4, when each data packet 40 is distinguished, 40_1, 40_2,..., 40_10 are used as codes indicating the data packets. 4 corresponds to the data size of each data packet 40. The horizontal width (length in the horizontal direction) of each data packet 40 shown in FIG. FIG. 4 illustrates a case where media packets generated by the data multiplexing unit 8 are continuously recorded as data packets 40 in the data recording area 11c.

  The predetermined data range of the recording data corresponds to the data size of the recording data 41 shown in FIG. In FIG. 4, the recording data 41 is indicated by reference numerals 42, 43,. The predetermined data range is not necessarily defined as a fixed size, but is a data size defined by the encoding unit 1101 and the decoding unit 1102. The predetermined data range is defined using, for example, a minimum data unit that can be recognized by the encoding unit 1101 and the decoding unit 1102.

  In the first embodiment, for example, the predetermined data range of the video data 42, 43, 44, 46, 48 is the data size when one frame of video is MPEG-encoded by the video encoding units 4 and 5. In addition, a case where the data size is recognizable as MPEG decoded data by the video decoding units 15 and 16 is shown.

  The data size of the video data 44, 46, and 48 of the P frame, that is, the predetermined data range, is predictive-coded by the inter-frame correlation between the P frame and the I frame in the time axis direction. , 43 is different from the predetermined data range. In FIG. 4, the Ch-1 P-frame video data 44 and 46 and the Ch-2 P-frame video data 48 have the same size, but they may have different sizes. Also, there are more cases where the sizes are different than when the sizes are equal. Therefore, as shown in FIG. 4, the predetermined data range of the video data 42, 43, 44, 46, 48 has an indefinite data length. As a result, the data packet 40 in which the access control header 30 having a predetermined data length is added to the video data 42, 43, 44, 46, 48 has an indefinite data length.

  Although the predetermined data range has an indefinite data length, the predetermined data range for a part of the recording data may have a constant data size. In the first embodiment, as shown in FIG. 4, the predetermined data range of the audio data 45 and 49 is set to a certain data size, for example, about 1 [KB], and the predetermined data of the external device data 47 and 50 is set. The range also shows a case where the data size is constant.

  Next, control information 31, 32,..., 35 stored in the access control header 30 and reading using the control information will be described. The control information stored in the access control header 30 is an ID for specifying whether the data packet 40 to which the control information is added is video data, audio data, other data, or external device data. Information 31 is included. The ID information 31 is, for example, information in which a unique value is assigned to each channel if the channel is different in the video data. In the external device data, the ID information 31 is information to which a unique value is assigned, for example, for each external device or each channel of the external device. In FIG. 4, when distinguishing each access control header 30, 30_1, 30_2,... Are used as codes indicating the access control header. In FIG. 4, in order to distinguish each mapping information footer 36, 36_1, 36_2,... Are used as codes indicating the mapping information footer.

  FIG. 5 is a diagram showing an example of assignment of ID information 31 in the recording / reproducing apparatus 1100 and the recording / reproducing method of the first embodiment. In this example, ID information “0x00” is assigned information indicating that the camera is channel number 1 (Ch−1), and ID information “0x01” is channel number 2 (Ch-2). Information indicating that the camera is the camera No. 1 is assigned to the ID information “0x10”. Further, ID information “0x20” is assigned information indicating data of an external device (referred to as external device A), and ID information “0x30” is assigned to another external device (external device B). Information indicating that it is data is assigned, information indicating that it is mapping data described later is assigned to ID information “0x50”, and information indicating that it is pointer data is assigned to ID information “0x80”. Information indicating that there is no data (No Data) is assigned to the ID information “0xFF”. FIG. 5 illustrates a case where information can be assigned to the ID information 31 from “0x00” to “0xFF” expressed in hexadecimal.

  When the ID information illustrated in FIG. 5 is used, “0x00” is assigned as the ID information 31 to all data packets 40 generated from the Ch-1 camera video. Similarly, “0x01” is assigned as the ID information 31 to all data packets 40 generated from the Ch-2 camera video. Also, “0x10” is assigned as the ID information 31 to all the data packets 40 generated from the Ch-1 microphone sound. Also, “0x20” is assigned as the ID information 31 to all data packets 40 generated from the external device A, and “0x30” is assigned as the ID information 31 to all data packets 40 generated from the external device B. Is done. Further, “0x50” is assigned to the mapping data packet 40 as the ID information 31, and “0x80” is assigned to the pointer data packet 40 as the ID information 31.

  FIG. 5 shows the case where one piece of ID information is assigned to each of the data of the external device A and the data of the external device B, but the data of the external device A includes a plurality of channels. For example, ID information may be assigned to each of a plurality of channels of data of the external device A.

  When reproducing the data packet 40 (for example, reference numeral 40_1 in FIG. 4), the control information reading unit 12 reads the ID information 31 of the access control header 30 (for example, reference numeral 30_1 in FIG. 4) of the data packet 40, If this matches the desired ID information, the data reading unit 13 reads another data packet 40 including the ID information 31 read by the control information reading unit 12. If the read ID information 31 does not match the desired ID information, the control information reading unit 12 reads the next data packet 40, for example, the figure until the ID information 31 that matches the desired ID information is read. 4, the control information of the right-side data packet 40 (for example, reference numeral 40_2 in FIG. 4) is read.

  Further, as shown in FIG. 4, the control information of the access control header 30 (for example, reference numeral 30_1 in FIG. 4) includes a data packet 40 (for example, reference numeral 40_1 in FIG. 4) including the control information in the data recording area 11c. Includes date and time information 32 indicating the date and time recorded in. When reproducing the data packet, the control information reading unit 12 reads the date information 32 of the data packet 40 (for example, reference numeral 40_1 in FIG. 4) that matches the desired date information. When the read date / time information 32 matches the desired date / time information, the data reading unit 13 reads another data packet 40 including the date / time information 32 read by the control information reading unit 12. If the read date and time information 32 does not match the desired date and time information, the data reading unit 13 reads the next data packet 40, for example, the adjacent data packet 40 (for example, the next data packet 40) (for example, , Control information 40_2) in FIG. 4 is read out.

  The control information of the access control header 30 includes data size information 33 indicating the data size of the data packet 40 (for example, reference numeral 40_1 in FIG. 4) including the control information. By reading the data size information 33, the control information reading unit 12 can know from which position in the data recording area 11c the recording of the adjacent data packet 40 (for example, reference numeral 40_2 in FIG. 4) is started. .

  FIG. 6 is a diagram illustrating an example of the structure of the mapping data 51 in the recording / reproducing apparatus 1100 and the recording / reproducing method of the first embodiment. First, mapping data in the case of associating external device data with an image will be described with reference to FIG. The mapping data packet designates video data to be associated with the external device data for one external device data. The list of mapping data constitutes one list for one piece of external device data, and a plurality of the lists is a mapping data packet. The list includes, for example, a list number, a list attribute, a data address of the external device data, ID information (corresponding image ID) of an image associated with the external device data, and address information (corresponding image) of the video data. Address). In the mapping data packet, together with this list information, the number M of lists (M is a natural number) indicating how many lists are included, and the maximum number of corresponding image information stored in one list are stored. Information of the maximum number N of associated images to be shown (N is a natural number) is included.

  In FIG. 6, the external device data corresponding to the list number “1” is stored in the data address “Dadd1”. The video data associated with the external device data is the data of the corresponding image 1 ID “0x00” (Ch-1 camera video data) stored in the corresponding image 1 address “Padd11” and the corresponding image x address “Padd1x”. The data of the corresponding image xID “0x01” stored and the data of the corresponding image NID “0x00” stored in the corresponding image N address “Padd1N” are included. Thus, the external device data is associated with a plurality of data. Thus, a plurality of data can be associated in detail with one external device data. The address information in the mapping data may be an absolute address on the recording medium or a relative address based on a specific position, but in general, it may be a relative address. This is desirable because the data size required to store the address information can be reduced. When using relative addresses, the reference position is not limited to one, and a plurality of reference positions may exist.

  The maximum number N of associated images in FIG. 6 is, for example, 8 or more when the maximum number of cameras is 8. The reason why the maximum number N of associated images is equal to or greater than the number of cameras is that the video data of one camera associated with one external device data is not necessarily one. This is because one external device data may be associated with a plurality of video data of one camera. For example, one external device data is generated per second, while if four pieces of camera video data are generated per second per camera, one external device data is generated in one second. It is desirable to associate the four pieces of image data to be associated. In this case, 32 may be designated as the maximum number N of associated images. When the maximum number N of associated images is designated as described above, there may occur a case where the associated data is less than the maximum number N of associated images depending on the situation. In such a case, the ID of the remaining part of the list is designated as “0xFF” to clearly indicate that there is no association data. Note that the maximum number N of associated images is not limited to 8 or 32 as illustrated, and the apparatus may be configured to set a required value in advance according to various conditions required for the apparatus. Alternatively, the device may be configured so that the user can make settings according to the environment in which the device is operated.

  Next, a case where external device data associated with the video data is designated from the video data will be described. When designating external device data associated with video data from the video data, a mapping information footer 36 provided at the end of the video data is used. As described in FIG. 2, the mapping information footer 36 has a plurality of pairs of mapping IDs 38 and list numbers 39. The mapping ID 38 specifies the ID of the mapping data packet, and the list number indicates which external device data indicated by the mapping data packet is associated with the list number. The mapping data packet is generated for each external device data having a different ID. In the first embodiment, as shown in FIG. 5, the ID information of the mapping data packet (mapping data A) regarding the external device data of the external device A is “ 0x50 ”and the ID information of the mapping data packet (mapping data B) related to the external device data of the external device B is“ 0x51 ”. Therefore, when the ID of the external device data to be associated with the mapping information footer 36 added to the image is designated as “0x50”, the image is associated with the external device data of the external device A, and the ID of the associated external device data Can be associated with external device data of the external device B. For example, when the mapping information footer 36 includes mapping ID 38 “0x50”, list number “10”, mapping ID 38 “0x51”, and list number “5”, external device data generated by the external device A Are the external device data whose address is indicated by the mapping data packet list number “10” and the external device data which is generated by the external device B and whose address is indicated by the mapping data packet list number “5”. Associated.

  Further, as shown in FIG. 6, the list attribute of the mapping data 51 indicates whether or not the external device data exists. When the value of the list attribute is “0x1”, the external device data exists, and when the value of the list attribute is “0x0”, it indicates that the external device data does not exist. When data is recorded for the first time, this list attribute is set to “0x1”. However, for example, when a part of the recorded data for recording is taken out and copied to another recording medium, the selected data does not include the external device data. By setting the list attribute to “0x0”, it is indicated that the selected data is data in which a part of the original data including the external device data is deleted.

  In the example of FIG. 6, image data is illustrated as data associated with external device data. However, since all data is handled in a uniform packet format and ID information is given to them as an identifier, The object associated with the mapping data packet is not limited to image data, and may be, for example, audio data or other external device data. Even when the object to be associated is audio data or other external device data, the association with various data can be realized with the same configuration as the case where the object to be associated is image data.

  As described above, according to the recording / reproducing apparatus 1100 and the recording / reproducing method of the first embodiment, when referring to the retrieved external device data, the user can display an image related to the retrieved external device data. It can be automatically selected and displayed on the display device without being specified at any time. For this reason, the work of the viewer when viewing the recorded data can be greatly reduced, and necessary data can be confirmed in a short time.

  Further, by continuously recording the data packet 40 in the data recording area 11c of the recording medium 11a, the data packet 40, that is, video data, audio data, other data, and external device data have an indefinite data length. In addition, the unused area in the data recording area 11c can be reduced. Furthermore, since the mapping data 51 whose data size varies depending on the data recording conditions is simultaneously multiplexed and recorded as the data packet 40, it is not necessary to secure a large data recording area and management data area for the mapping data in advance. . Therefore, according to the recording / reproducing apparatus 1100 and the recording / reproducing method of the first embodiment, data can be efficiently recorded on the recording medium 11a, and as a result, recording can be performed for a longer time.

  In addition, when specifying external device data associated with the image data from the image data, it is not specified using the address of the external device data, but is specified by a number in the mapping data packet. The number of processing steps can be reduced in the recording process. That is, when the image data is associated with the external device data using the address information, it is necessary to create this address information at the stage where all the recording positions of the recording data are determined. In this case, since the related data can be designated even before the recording position of the recording data is determined, the recording process can be performed at a higher speed and the number of data that can be recorded can be increased. .

  Further, by continuously recording all the data packets 40 in the data recording area 11c of the recording medium 11a, various data such as external device data and video data can be recorded or read out at a high speed. Therefore, it is possible to realize a device with higher performance in terms of the number of data that can be recorded simultaneously than in the case where each is recorded in a separate area.

  In addition, when mapping data indicating an association with external device data is recorded as a data packet 40 at the same time as video data, audio data, etc., the mapping data position constraint is such that the mapping data is always placed at the head of the data. Since mapping data can be arranged at any position in the data recording area, mapping data can be written even after the positions of various data are determined. As a result, the recording area can be used effectively, and the process of rewriting the mapping data again after the data has been confirmed is unnecessary, so that recording / playback can be performed by a component with a lower processing capacity (for example, an arithmetic processing unit). A device can be realized.

  Since each mapping data list includes attribute information indicating whether or not the external device data exists, for example, a part of the recorded recording data is extracted and copied to another recording medium. In such a case, even when certain external device data is not included in the copy range, it is only necessary to rewrite only the attribute to clearly indicate that the data does not exist. For this reason, the processing step of reassigning the list number is reduced, and the recording / reproducing apparatus can be realized by a component (for example, an arithmetic processing unit) having a lower processing capability. In addition, when extracting and reconstructing data such as by copying data, the list number in the mapping data packet and the list number of external device data specified from video data or audio data are not reassigned. Since data can be easily reconstructed, data can be copied at a higher speed.

Embodiment 2. FIG.
FIG. 7 is a diagram showing an example of an installation situation of a camera that generates a video signal in the recording / reproducing apparatus and the recording / reproducing method according to the second embodiment of the present invention. In the second embodiment, the elevator control data sent from the elevator control device 136 and including the current position information of the elevator car 122 and the opening / closing information of the elevator doors, and the video of the camera 130 installed inside the elevator car 122 are shown. When the data and the video data of the cameras 131, 132,..., 135 provided on the elevator floor outside the elevator are dynamically associated based on the position information of the elevator car 122, and the association target is changed. explain.

  As shown in FIG. 7, in an elevator 121 provided in a building 120 such as a building, an elevator car 122 on which a person or a luggage is placed moves up and down in the range from the first floor to the fourth floor of the building 120. A camera 130 is installed inside the elevator car 122. A camera 131 is installed on the first floor, a camera 132 is installed on the second floor, a camera 133 is installed on the third floor, a camera 134 is installed on the fourth floor, and a camera 135 is installed on the roof. Cameras 130,..., 135 send video data to the recording / reproducing apparatus of the second embodiment. The configuration of the recording / reproducing apparatus of the second embodiment is the same as that of FIG. Therefore, the contents described with reference to FIGS. 1 to 6 are applied to the recording / reproducing apparatus and the recording / reproducing method of the second embodiment.

  In the recording / reproducing apparatus and recording / reproducing method of the second embodiment, the position information acquisition unit 113 acquires control information through the external information input unit 21, and from this control information, the floor or the passage where the elevator car 122 is currently stopped is passed. The information of the floor is acquired, and the camera associated with the control data is dynamically switched based on the information.

  FIG. 8 is a diagram illustrating dynamic data association in the recording / reproducing apparatus and the recording / reproducing method of the second embodiment. In FIG. 8, the lower line graph indicates on which floor the elevator car 122 exists. In the second embodiment, the position information acquisition unit 113 acquires the position information of the elevator car 122 from the elevator control data. The example of FIG. 8 illustrates a case where the elevator car 122 that has been stopped on the first floor rises from the first floor to the fourth floor, stops on the fourth floor, and then descends to the second floor. In addition, the horizontally long bar-shaped portion in the upper part of FIG. 8 indicates which camera is associated with the external device data. A period (horizontal axis) indicated by a horizontally long bar-shaped portion hatched by a vertical line indicates a period in which the cameras 130,..., 135 are associated with external device data. As shown by the horizontally long bar-shaped portion, the rooftop camera 135 is not associated with the external device data, while the video data of the camera 130 in the elevator car 122 is always associated with the external device data. When the elevator car 122 moves up from the first floor to the fourth floor, when the elevator car 122 is stopped on the first floor, the elevator car 122 is associated with the external device data and the video data of the camera 131 on the first floor, and the elevator car 122 When 122 is stopped on the 4th floor, the external device data is associated with the video data of the camera 134 on the 4th floor, and when the elevator car 122 passes the 2nd or 3rd floor, the external device data and the 2nd floor. Are associated with the video data of the camera 132 or the video data of the camera 133 on the third floor. Similarly, when the elevator car 122 descends from the fourth floor to the second floor, while the elevator car 122 is stopped on the fourth floor, the external equipment data and the video data of the camera 134 on the fourth floor are associated with each other. While passing the third floor, the external device data is associated with the video data of the camera 133 on the third floor, and when the elevator car 122 is stopped on the second floor, the external device data is associated with the video data of the camera 132 on the second floor. As in this example, the number of cameras associated with external device data is not limited to one, and can be dynamically associated with a plurality of cameras.

  In this example, the case where the camera image close to the position where the elevator car 122 is present and the control data (external device data) of the elevator 121 are associated with each other has been described as an example. Control data may be associated. For example, when the elevator car 122 ascends from the first floor to the fourth floor, the camera on the fourth floor, which is the destination, may be associated with the control data.

  As described above, according to the recording / reproducing apparatus and the recording / reproducing method of the second embodiment, in the usage environment in which the data that needs to be associated dynamically changes as the position of the external device data dynamically changes. When viewing recorded data, the user does not have to manually switch the camera channel frequently according to the position information of the external device data, and the necessary camera video is automatically switched and displayed on the display device. Can be made.

  For example, as a specific example, in a 15-story building, a camera is installed on each floor, a camera is installed in the elevator car 122, and an image of the floor camera when the elevator door is opened and closed on the stop floor And a case where the camera images in the elevator car 122 are simultaneously confirmed. In the second embodiment, for example, the video of the camera in the elevator car 122 and the video of the camera on the stop floor can be automatically selected, and the two camera videos can be displayed largely on the screen of the display device.

  On the other hand, in the conventional device, it is possible to display 16 images on the display device simultaneously on the screen, but in this case, the images of each camera are displayed in a small size, so detailed confirmation is performed. I can't. Therefore, it is necessary to perform an operation of switching the camera number by using a button provided on the recording device or a menu screen according to the stop floor. For example, the conventional example and the second embodiment are compared in the case where 60 stops occur in the range of one hour and the stop time per one is 30 seconds. In the conventional device, the video is paused for each stop floor, and when the video is paused, the video is too far from the desired position. Therefore, the video is rewinded slightly, and the video is switched to the camera in the elevator car 122 and reproduced again. And then perform a number of operations such as rewinding to check the floor image, pausing again, pausing, and switching the camera image to the stop floor camera for playback. Such a series of manual operations requires a long time (for example, about 2 hours 30 minutes). In contrast, in the second embodiment, the video in the elevator car 122 and the floor video in which the screen automatically switches can be switched and displayed at the same time, so that the desired video and data associated with each other can be displayed in one hour. Can be viewed. As described above, in the second embodiment, in the conventional example, the viewing time, which is about 2 hours 30 minutes, which is 2.5 times the recording time, can be reduced to about 1 hour. .

Embodiment 3 FIG.
FIG. 9 is a diagram showing an example of an installation situation of a camera that generates a video signal in the recording / reproducing apparatus and the recording / reproducing method of Embodiment 3 according to the present invention. FIG. 9 shows one floor of a building, and an area 151 in this floor is an area for data recording. The external device 152 moves within the area 151. Cameras 153,..., 156 installed in the area 151 capture a predetermined portion in the area 151. The camera 153 captures the first area portion 151a in the area 151, the camera 154 captures the second area portion 151b in the area 151, and the camera 155 captures the third area portion 151c in the area 151. The camera 156 captures the fourth area portion 151d in the area 151. The cameras 153,... 156 send video data to the recording / reproducing apparatus of the third embodiment. The configuration of the recording / reproducing apparatus of the third embodiment is the same as that of FIG. For this reason, the contents described with reference to FIGS. 1 to 6 are applied to the recording / reproducing apparatus and the recording / reproducing method of the third embodiment.

  In the third embodiment, when the position of the external device 152 is within the first area portion 151a, the external device data is associated with the video data of the camera 153, and the position of the external device 152 is the second area portion. If the position of the external device 152 is within the third area portion 151c, the external device data is associated with the video data of the camera 155. When the position of the external device 152 is within the fourth area portion 151d, the external device data is associated with the video data of the camera 156. Note that the position information of the external device 152 can be generated using, for example, position information using GPS (Global Positioning System), position information using RFID (Radio Frequency IDentification), and the like. The position information of the external device 152 generated by some means is extracted by the position information acquisition unit 113 of the recording / playback apparatus, and the mapping data generation unit 111 performs dynamic association.

  Here, an example in which one video data is associated with the external device data according to the area is shown, but two video data may be associated with the data of the external device 152. For example, the external device 152 is the first device. In this case, the images of both the camera 153 and the camera 154 may be associated with each other.

  As described above, according to the recording / reproducing apparatus and the recording / reproducing method of the third embodiment, the usage environment in which the data that needs to be associated dynamically changes as the position of the external device data dynamically changes. In order to view recorded data on the display device, the user automatically switches the necessary camera image without frequently switching the camera channel manually by the user according to the position information of the external device data. Can do.

Embodiment 4 FIG.
FIG. 10 is a diagram showing an example of an installation situation of a camera that generates a video signal in the recording / reproducing apparatus and the recording / reproducing method according to the fourth embodiment of the present invention. FIG. 10 shows one floor of a building, and an area 141 in this floor is an area for data recording. External devices 143, 144, and 145 that generate external device data move within the area 141. The camera 142 for image shooting is a pan / tilt zoom camera capable of dynamically changing the shooting direction and zoom, and the cameras 146, 147, and 148 respectively capture images of the external devices 143, 144, and 145. The pan / tilt zoom camera 142 shoots the floor 141 widely while periodically changing the shooting direction. The pan / tilt zoom camera 142 and the cameras 143, 144, and 145 send video data to the recording / reproducing apparatus of the fourth embodiment. The configuration of the recording / reproducing apparatus of the fourth embodiment is the same as that of FIG. Therefore, the contents described with reference to FIGS. 1 to 6 are applied to the recording / reproducing apparatus and the recording / reproducing method of the fourth embodiment.

  In the fourth embodiment, when the shooting direction of the camera 142 is at an angle at which the first range 141a shown in FIG. 10 is shot, the video data of the pan / tilt zoom camera 142 is associated with the external device data of the external device 143. I do. When the shooting direction of the camera 142 is at an angle at which the second range 141b shown in FIG. 10 is shot, the video data of the pan / tilt zoom camera 142 is associated with the external device data of the external device 144. When the shooting direction of the camera 142 is at an angle at which the third range 141c shown in FIG. 10 is shot, the video data of the pan / tilt zoom camera 142 is associated with the external device data of the external device 145. The angle information of the pan / tilt / zoom camera 142 may be input from the video input units 2 and 3 while being superimposed on the video data, or may be input from the external information input unit 21. The direction information of the pan / tilt / zoom camera 142 input by any means is extracted by the position information acquisition unit 113, and the mapping data generation unit 111 performs the dynamic association as described above, for example. .

  As described above, according to the recording / reproducing apparatus and the recording / reproducing method of the fourth embodiment, recording is performed in a usage environment in which the data that needs to be associated dynamically changes as the position of the video changes dynamically. When viewing data, the necessary camera images can be automatically switched and displayed on the display device without frequently switching the camera channel manually by the user according to the position information of the video data.

Embodiment 5 FIG.
FIG. 11 is a diagram showing dynamic data association in the recording / reproducing apparatus and the recording / reproducing method according to the fifth embodiment of the present invention. Note that FIG. 7 (Embodiment 2) is also referred to in the description of Embodiment 5. Further, the contents described with reference to FIGS. 1 to 6 are applied to the recording / reproducing apparatus and the recording / reproducing method of the fifth embodiment. In the fifth embodiment, the association between external device data and video data is dynamically changed based on date / time information (time information).

  In FIG. 11, the lower line graph indicates on which floor the elevator car 122 exists. In the fifth embodiment, the position information acquisition unit 113 acquires elevator car position information from the elevator control data. In the building 120 of FIG. 7, when associating the control data of the elevator with the video of each camera, for example, the third floor where the video is being shot by the camera 133 is within a certain time range, for example, from 20:00 to the next day. Even if the elevator car 122 passes through the third floor when the lights are off until 8:00 in the morning and no people enter or leave, the video data from the camera 133 on the third floor is associated with the control data of the elevator. Not performed.

  In the example of FIG. 11, the elevator car 122 that has been stopped on the first floor is lifted from the first floor to the fourth floor, stopped on the fourth floor, and then lowered to the second floor. In addition, the horizontally long bar-shaped portion in the upper part of FIG. 11 indicates which camera is associated with the external device data. A period (horizontal axis) indicated by a horizontally long bar-shaped portion hatched by a vertical line indicates a period in which the camera is associated with external device data. As shown by the horizontally long bar-shaped portion, the rooftop camera 135 and the third-floor camera 133 are not associated with the external device data, while the video data of the camera 130 in the elevator car 122 is always the same as the external device data. Is associated. When the elevator car 122 moves up from the first floor to the fourth floor, when the elevator car 122 is stopped on the first floor, the elevator car 122 is associated with the video data of the camera 131 on the first floor, and the elevator car 122 is moved to the fourth floor. Is associated with video data of the camera on the fourth floor, and when the elevator car 122 is passing through the second floor, it is associated with the video data of the camera 132 on the second floor. Even when 122 passes through the third floor, it is not associated with the video data of the camera 133 on the third floor. Similarly, when the elevator car 122 descends from the fourth floor to the second floor, when the elevator car 122 is stopped on the fourth floor, the elevator car 122 is associated with the video data of the camera 134 on the fourth floor, and the elevator car 122 passes the third floor. Even when the elevator car 122 is passing the second floor, it is associated with the video data of the second-floor camera 132 while the elevator car 122 is passing the second floor. As in this example, the number of cameras associated with external device data is not limited to one, and can be dynamically associated with a plurality of cameras.

  As described above, according to the recording / reproducing apparatus and the recording / reproducing method of the fifth embodiment, when recording data is viewed in a usage environment in which data that needs to be associated dynamically changes according to the recording time. This prevents unnecessary images from being displayed and allows efficient viewing. In other words, since it is possible to dynamically associate data based on the date and time information, it is possible to automatically exclude useless videos and view them according to time.

Embodiment 6 FIG.
FIG. 12 is a diagram for explaining the forward direction pointer 34 and the backward direction pointer 45 in the recording / reproducing apparatus and the recording / reproducing method according to the sixth embodiment of the present invention.

  In the sixth embodiment, address information indicating a relative positional relationship indicating another data packet generated at the next time point from a data packet as a starting point is indicated by the forward direction pointer 34 (arrows 34_1, 34_2,... In FIG. 6). Show. That is, in the sixth embodiment, the data packet that is the starting point is the starting point of the other data packets that include ID information that matches the ID information (reference numeral 31 in FIG. 2) of the data packet that is the starting point in the access control header 30. Address information indicating the position of the data packet generated at the next time of the next data packet relative to the position of the starting data packet is held as the forward direction pointer 34.

  For example, the forward direction pointer 34_1 of the data packet 40 (reference numeral 40_1 in FIG. 12) includes ID information of “video Ch-1” and is generated at the next time point of the own data packet 40 (reference numeral 40_1 in FIG. 12). The head position of the data packet 40 (reference numeral 40_3 in FIG. 12) is shown. The forward direction pointer 34_2 of the data packet 40 (reference numeral 40_3 in FIG. 12) includes ID information of “video Ch-1” and is generated at the next time point of the own data packet 40 (reference numeral 40_3 in FIG. 12). The head position of the packet 40 (reference numeral 40_5 in FIG. 12) is shown. The forward direction pointer 34_3 of the data packet 40 (reference numeral 40_5 in FIG. 12) includes ID information of “video Ch-1” and is generated at the next time point of the own data packet 40 (reference numeral 40_5 in FIG. 12). The head position of the packet 40 (reference numeral 40_8 in FIG. 12) is shown. The forward direction pointer 34_4 of the data packet 40 (reference numeral 40_8 in FIG. 12) includes ID information of “video Ch-1”, and is generated at the next time point of the own data packet 40 (reference numeral 40_8 in FIG. 12). The head position of the packet 40 (reference numeral 40_9 in FIG. 12) is shown.

  Similarly, the forward direction pointer 34_5 of the data packet 40 (reference numeral 40_2 in FIG. 12) includes the ID information of “video Ch-2” and is generated at the next time point of the own data packet 40 (reference numeral 40_2 in FIG. 12). The head position of the received data packet 40 (reference numeral 40_7 in FIG. 12) is shown.

  Similarly, the forward direction pointer 34_6 of the data packet 40 (reference numeral 40_4 in FIG. 12) includes ID information of “voice Ch-1” and is generated at the next time point of the own data packet 40 (reference numeral 40_4 in FIG. 12). The head position of the received data packet 40 (reference numeral 40_10 in FIG. 12) is shown. The forward direction pointer 34_7 of the data packet 40 (reference numeral 40_10 in FIG. 12) includes the ID information of “voice Ch-1”, and is generated at the next time point of the own data packet 40 (reference numeral 40_10 in FIG. 12). The head position of the packet 40 (reference numeral 40_12 in FIG. 12) is shown.

  Similarly, the forward direction pointer 34_8 of the data packet 40 (reference numeral 40_6 in FIG. 12) includes ID information of “external device A” and is generated at the next time point of the own data packet 40 (reference numeral 40_6 in FIG. 12). The leading position of the data packet 40 (reference numeral 40_11 in FIG. 12) is shown.

  In the sixth embodiment, the address information indicating the relative positional relationship indicating another data packet generated at the previous time point from the data packet serving as the starting point is indicated by the backward pointer 35 (arrows 35_1, 35_2,... In FIG. 6). Shown with arrows. That is, in the sixth embodiment, the data packet serving as the starting point is the other data packet including the ID information matching the ID information (reference numeral 31 in FIG. 2) of the data packet serving as the starting point in the access control header 30. Address information indicating the position of the data packet generated at the time before the starting data packet relative to the position of the starting data packet is held as the backward pointer 35.

  For example, the backward pointer 35_1 of the data packet 40 (reference numeral 40_3 in FIG. 12) includes the ID information of “video Ch-1”, and is generated at a time point before the own data packet 40 (reference numeral 40_3 in FIG. 12). The leading position of the data packet 40 of the I-frame data packet 40 (reference numeral 40_1 in FIG. 12) that can be independently decoded is shown. The backward pointer 35_2 of the data packet 40 (reference numeral 40_5 in FIG. 12) includes ID information of “video Ch-1”, and is generated at the time point before the own data packet 40 (reference numeral 40_5 in FIG. 12). The head position of the packet 40 (reference numeral 40_1 in FIG. 12) is shown. The reverse forward direction pointer 35_3 of the data packet 40 (reference numeral 40_8 in FIG. 12) includes the ID information of “video Ch-1” and is generated at a time point before the own data packet 40 (reference numeral 40_8 in FIG. 12). The head position of the data packet 40 (reference numeral 40_1 in FIG. 12) is shown. The backward pointer 35_4 of the data packet 40 (reference numeral 40_9 in FIG. 12) includes ID information of “video Ch-1”, and is generated at a time point before the data packet 40 (reference numeral 40_9 in FIG. 12). The head position of the packet 40 (reference numeral 40_1 in FIG. 12) is shown.

  Similarly, the backward pointer 35_5 of the data packet 40 (reference numeral 40_7 in FIG. 12) includes the ID information of “video Ch-2” and is generated at a time point before the own data packet 40 (reference numeral 40_7 in FIG. 12). The head position of the independently decoded I-frame data packet data packet 40 (reference numeral 40_2 in FIG. 12) is shown.

  Similarly, the backward pointer 35_6 of the data packet 40 (reference numeral 40_12 in FIG. 12) includes ID information of “voice Ch-1”, and is generated at a time point before the own data packet 40 (reference numeral 40_12 in FIG. 12). The head position of the received data packet 40 (reference numeral 40_10 in FIG. 12) is shown. The backward pointer 35_7 of the data packet 40 (reference numeral 40_10 in FIG. 12) includes ID information of “voice Ch-1”, and is generated at the time point before the own data packet 40 (reference numeral 40_10 in FIG. 12). The head position of the packet 40 (reference numeral 40_4 in FIG. 12) is shown.

  Similarly, the backward pointer 35_8 of the data packet 40 (reference numeral 40_11 in FIG. 12) includes the ID information of “external device A” and is generated at a time point before the own data packet 40 (reference numeral 40_11 in FIG. 12). The start position of the data packet 40 (reference numeral 40_6 in FIG. 12) is shown.

  As described above, according to the recording / reproducing apparatus and the recording / reproducing method of the sixth embodiment, the forward pointer 34 and the backward pointer 35 are used as the access control header for each ID assigned to each data type. Because it is provided, the desired data position can be known instantly, and only the necessary data associated with the recorded data in which the data of many channels are multiplexed is selected at high speed and displayed on the display device. Can be made. For this reason, when the associated data is selectively read out, desired data can be easily read out, and the time until the data is displayed on the display device can be shortened.

Embodiment 7 FIG.
In the third prior art, it is possible to search for data based on date and time information (for example, time information of a radio clock) commonly assigned to video data and other data, but the data is generated. Data could not be retrieved based on the unique date and time information possessed by the device. For example, for external device data for monitoring purposes, etc., the external device that generates the external device data has date / time information, for example, as metadata, and this date / time information is added to the data recorded in the recording device. It does not always match the date information. For this reason, when it is necessary to search for data using date / time information unique to the external device (for example, date / time information based on metadata), for example, video data is searched based on the date / time information assigned to the video data. This data needs to be searched based on the time unique to the external device, which is troublesome. The recording / reproducing apparatus and recording / reproducing method of the seventh embodiment can also solve such problems.

  FIG. 13 shows the data structure and pointer packet of the data recording area 11c in the recording / reproducing apparatus and recording / reproducing method of the seventh embodiment according to the present invention. As shown in FIG. 13, the data recording area 11c of the recording medium 11a (shown in FIG. 3) includes a plurality of divided data recording areas 89_1, 89_2, 89_3,... (Or 89) divided at regular data intervals. May be included. Pointer packets 80_1, 80_2, 80_3,... (Or 80) are provided for each of the divided data recording areas 89_1, 89_2, 89_3,. In FIG. 13, the cross-hatched part indicates pointer packets 80_1, 80_2, 80_3,. In the seventh embodiment, the constant data interval of the divided data recording areas 89_1, 89_2, 89_3,... Is an integer multiple of the recording unit of the recording medium 11a, and the pointer packet 80 is a recording unit of the recording medium 11a. The case where it is provided at intervals of an integer multiple of is described.

  Each pointer packet 80 includes start pointers 81, 82, 83, end pointers 84, 85, 86, divided section minimum date information 101 based on common date information, and divided section maximum date information 102 based on common date information. And divided section minimum information 103, 104, 105 based on individual date information, and divided section maximum date information 106, 107, 108 based on individual date information. Each pointer packet 80 has an access control header 30 at the head, as with other data packets (as shown in FIG. 2). The common date / time information is, for example, date / time information acquired by the control information generation unit 9 (for example, generated by a clock built in the recording / reproducing apparatus or received from the outside). The individual date / time information is date / time information specific to the external device that generates the external device data.

  The head pointers 81, 82, and 83 record the ID information (reference numeral 31 in FIG. 2) of the data packet 40 recorded in the divided data recording area 89 provided with the pointer packet 80 in the divided data recording area 89. The position of the data packet that is read first among the data packets 40 including the ID information (reference numeral 31 in FIG. 2) is stored as address information that is relatively indicated from the position of the pointer packet 80. In the following description, a case where the data packet 40 including ID information (reference numeral 31 in FIG. 2) from “0x00” to “0xFF” can be recorded in the divided data recording area 89 is illustrated. The head pointer 82 indicates one or a plurality of pointers.

  FIG. 14 is a diagram showing a pointer packet 80_1 in the recording / reproducing apparatus and recording / reproducing method of the seventh embodiment. In FIG. 14, the cross-hatched part shows a pointer packet 80.

  The head pointer 81 of the pointer packet 80 is provided with the pointer packet 80 among the data packets whose ID information (reference numeral 31 in FIG. 2) is “0x00” (that is, any of the data packets 40_21,..., 40_35). In the divided data recording area 89, the address of the data packet read out first is stored. In FIG. 14, the data packet with “No. 1” (that is, one of the data packets 40_21, 40_22, 40_23, 40_26, and 40_35) is a data packet that is read first in the divided data recording area 89_1. Indicates.

  In addition, the pointer packet 80 includes a pointer packet 80 among the data packets whose ID information (reference numeral 31 in FIG. 2) is “0xFF” (that is, one of the data packets 40_21,..., 40_35). Is stored in the divided data recording area 89 where the data packet is read out first.

  Similarly, in the head pointer 82 of the pointer packet 80, the data packet whose ID information (reference numeral 31 in FIG. 2) is any one from “0x01” to “0xFE” (that is, any of the data packets 40_21,..., 40_35). )), The address of the data packet to be read first is stored in the divided data recording area 89 in which the pointer packet 80 is provided.

  Thus, the pointer packet 80 stores the address of the data packet that is read first for each ID information. When there is no data packet of ID information corresponding to the divided data recording area 89, for example, “0” is stored in the head pointer (that is, one of the head pointers 81, 82, and 83). .

  The pointer packet 80 stores end pointers 84, 85, and 86. Each of the end pointers 84, 85, 86 has ID information of a data packet (that is, one of the data packets 40_21,..., 40_35) recorded in the divided data recording area 89 in which the pointer packet 80 is provided. On the other hand, the position of the last read data packet among the data packets recorded in the divided data recording area 89 and including the ID information (that is, any of the data packets 40_21,..., 40_35) is indicated by the pointer packet 80. The address information shown relative to the position of is stored. The end pointer 85 indicates one or a plurality of pointers.

  In the end pointer 84 of the pointer packet 80, among the data packets whose ID information is “0x00” (that is, any one of the data packets 40_21,..., 40_35), the divided data recording area 89 provided with the pointer packet 80 is provided. The address of the data packet read last is stored. In FIG. 14, the data packet 40 to which “No. k”, “No. l”, “No. m”, “No. n” (k, l, m, n are natural numbers) is assigned to the divided data record. This indicates that the data packet 40 is read last in the area 89.

  Further, in the end pointer 86 of the pointer packet 80, among the data packets whose ID information is “0xFF” (that is, any one of the data packets 40_21,..., 40_35), the divided data recording in which the pointer packet 80 is provided. The address of the data packet read last in the area 89 is stored.

  Similarly, in the end pointer 85 of the pointer packet 80, the data packet whose ID information (reference numeral 31 in FIG. 2) is any one from “0x01” to “0xFE” (that is, any of the data packets 40_21,..., 40_35). The address of the data packet read last is stored in the divided data recording area 89 where the pointer packet 80 is provided. When there is no corresponding ID information data packet in the divided data recording area 89, for example, “0” is stored as the end pointer.

  Further, in FIG. 14, when there is only one piece of ID information data in the divided data recording area as in the entry data, the head pointer and the terminal pointer point to the same position.

  Note that the data sizes of the start pointers 81, 82, and 83 and the data sizes of the end pointers 84, 85, and 86 are determined according to the size of the divided data recording area 89, and are within the range of the divided data recording area 89. A data size capable of relatively expressing the address is secured.

  As shown in FIG. 13, in the pointer packets 80_1, 80_2,... (Or 80), data packets (in the divided data recording areas 89_1, 89_2, 89_3,. That is, the data packet 40_21,..., 40_35) is recorded in the divided data recording area 89 provided with the date and time information at which the data packet 40 was first recorded, that is, the common minimum date and time information 101 and the pointer packet 80. Stored is information on the date and time when the data packet 40_21,..., 40_35 was last recorded, that is, common maximum date and time information 102.

  FIG. 15 is a diagram showing individual divided section minimum date and time information and divided section maximum date and time information in the recording / reproducing apparatus and recording / reproducing method of the seventh embodiment. In the pointer packet 80, for each ID information, the data packet of the ID information is first recorded in the divided data recording area 89 provided with the pointer packet 80 based on the individual date and time information of the external device. Date and time information, that is, information on the date and time when the data packet 40 of the ID was last recorded in the divided data recording area 89 provided with the individual divided section minimum date and time information 103, 104 and 105 and the pointer packet 80. That is, individual divided section maximum date and time information 106, 107, 108 is stored. An example in which individual divided section minimum date information 103, 104, 105 and individual divided section maximum date information 106, 107, 108 are recorded as shown in FIG. 14 will be described with reference to FIG. To do. As shown in FIG. 15, as the individual divided section minimum date / time information 103 for the ID information “0x00”, the date / time information of the external device included in the “No. 1” data of “Video Ch-1” is stored. To do. Further, as the individual divided section maximum date / time information 106 for the ID information “0x00”, the date / time information held by the external device included in the “No. m” data of “Video Ch-1” is stored. In addition, when the data does not have individual date information, a case where information based on the common time is described is illustrated.

  FIG. 16 is a diagram showing grouped divided recording areas in the recording / reproducing apparatus and recording / reproducing method of the seventh embodiment. As shown in FIG. 16, in the data recording area 11c, a plurality of divided data recording areas 89 can be divided (grouped) into a plurality of groups. In the data recording area 11c, a predetermined number (for example, 16) of divided data recording areas 89 may be managed as one group area 90. In this case, a group number is given along the address of the data recording area 11c, and a divided data recording area number (for example, # 0,..., # 15) is assigned to each group along the address of the data recording area 11c. ) Is given.

  FIG. 17 is a diagram for explaining data search in the data management area in the recording / reproducing apparatus and recording / reproducing method of the seventh embodiment. FIG. 17 shows an example of a data search table provided in the data management area 11b. In the data search table 109 of FIG. 17, for each group area number, data presence / absence information (“data_exist0”, “data_exist1”,...) For each ID and individual group area minimum / group based on individual date / time information for each ID. Area maximum date / time information (“TLmin000 / TLmax000” to “TLmin0FF / TLmax0FF”, “TLmin100 / TLmax100” to “TLmin1FF / TLmax1FF”,...)) And group area minimum / group area maximum date / time information (“ TImin0 / TImax0 "," TImin1 / TImax1 ", ...).

  “Data presence / absence information for each ID” clearly indicates whether there is data of each ID in the group area. Here, in order to clearly indicate the presence / absence of data for 256 IDs, 32-byte data Consists of size. The 32 bytes are 256-bit information, and each bit indicates the presence / absence of data of one ID.

  “Group area minimum date / time information based on individual date / time information” is the date / time information of data first recorded in the group area for each ID, and this time is the time that the external device that generated the data had It is based on. For example, the external device data of the elevator control data is not based on the date / time information that the recording / reproducing apparatus of the seventh embodiment has but based on the date / time information that the elevator control apparatus has. Similarly, “group area maximum date and time information based on individual date and time information” is the date and time information of the data recorded last in the group area for each ID, and this time is held by the external device that generated the data. It is based on the time that had been spent.

  “Group area minimum date / time information based on common date / time information” is the date / time information of data first recorded in the group area. Similarly, “Group area maximum date / time information based on common date / time information” is the group area The date / time information of the last recorded data is based on the date / time information of the recording / reproducing apparatus.

  FIG. 18 is a diagram showing pointer information to the management data area mapping data in the recording / reproducing apparatus and recording / reproducing method of the seventh embodiment. FIG. 18 shows a pointer information table 110 to the mapping data packet provided in the management data area 11b. This management information indicates the position information of the mapping data in the data recording area. This management information is generated for each group, and the divided data recording area number (“nn1”, “nn2”, “nn3”,...) In the group and the relative address information (“ MpAdd1 ”,“ MpAdd2 ”,“ MpAdd3 ”,... Since the data size of one group area is a fixed size and the number of groups is determined once the size of the recording medium is determined, the data size of this management information is a fixed size.

  In the recording / reproducing apparatus of the seventh embodiment, when performing reproduction, the control information reading unit 12 refers to the information of the pointer packet 80, and thereafter, the divided data recording area 89 based on the information of the head pointers 81, 82, and 83. The data packet 40 to be read first is read out. The recording / reproducing apparatus of the seventh embodiment reads the data packet 40 to be read last in the divided data recording area 89 based on the information of the end pointers 84, 85, 86 when performing reverse reproduction. If the data packet 40 including the desired ID information 31 is not recorded, the next pointer packet 80 is read.

  The control information reading unit 12 first reads the common divided section minimum date information 101 and the common divided section maximum date information 102 before reading the start pointers 81, 82, 83 and the end pointers 84, 85, 86. Alternatively, individual divided section minimum date information 103, 104, 105 and individual divided section maximum date information 106, 107, 108 are read. Then, the control information reading unit 12 has a desired date / time of the common divided section minimum date / time information 101 and the common divided section maximum date / time information 102, or individual divided section minimum date / time information 103, 104, 105 and individual divided sections. It reads out whether it exists between the section maximum date information 106, 107, 108. If the desired date and time is within this range, the control information reading unit 12 continues to read the start pointers 81, 82, 83 or the end pointers 84, 85, 86. If the desired date / time is not within this range, the control information reading unit 12 reads the next pointer packet 80.

  Furthermore, before referring to the information of the pointer packet 80, the management information reading unit 28 refers to the data search table provided in the data management area 11b. The management information reading unit 28 reads common group area minimum / group area maximum date / time information or individual group area minimum / group area maximum date / time information for each group area, and determines whether a desired date / time is included. If it is included, the data presence / absence information for each ID is read, and it is determined whether or not the desired data is included in the group.

  Further, when it is determined that the desired data is included in the group, the management information reading unit 28 can know the address information of the association data from the pointer information table 110 to the mapping data, and based on the information , Mapping information can be referenced instantly.

  In the seventh embodiment, an example in which a plurality of divided data recording areas divided at regular data intervals and a group of a predetermined number of divided recording areas are provided is shown. The number of groups is not necessarily plural. When the size of the recording area is small, one divided recording area may be configured as one group.

  Further, the management data provided in the management data area 11b is not limited to only the position information of the mapping data, and other management information may be stored simultaneously with the position information of the mapping data. For example, entry information for other specific packets may be stored as management data provided in the management data area 11b.

  Further, although the data search table 109 provided in the data management area 11b and the pointer table 110 to the mapping data are described separately, these tables may be constructed as one table.

  As described above, according to the recording / reproducing apparatus and recording / reproducing method of the seventh embodiment, the search table provided in the management data area and the pointer packet of the data area include the minimum / maximum date / time information and data presence / absence of individual external devices. By holding the information and the pointer information to the mapping data, it is possible to search for desired data at high speed using the date / time information unique to the external device and access the associated data.

  Further, by reading the pointer packet 80 before reading the data packet 40, it is possible to instantaneously search whether or not the data packet 40 including the desired ID information is recorded in the corresponding divided data recording area 89. it can. In this way, when the control information reading unit 12 reads the desired control information, the desired control information can be retrieved efficiently, so that the data packet 40 can be read at high speed.

  Further, since the pointer packet 80 is provided at intervals of an integral multiple of the recording unit of the recording medium 11a, the pointer packet 80 can be efficiently read from the recording medium 11a.

Embodiment 8 FIG.
FIG. 19 is a diagram showing a data structure of the data recording area 11c in the recording / reproducing apparatus and the recording / reproducing method according to the eighth embodiment of the present invention. 19, elements that are the same as or correspond to those shown in FIG. 4 (Embodiment 1) are assigned the same reference numerals.

  19, S1, S2,..., S10 indicate the data sizes of the data packets 40_1, 40_2,..., 40_10 (or 40). In the eighth embodiment, the data packets 40_1, 40_2,..., 40_10 are configured such that the data sizes S1, S2,. The discrete indefinite data length is, for example, a data length that is an integral multiple of a data transfer unit (for example, 32 bytes). When the data size of the recording data 41 shown in FIG. 2 is not an integer multiple of 32 bytes, stuffing for data alignment is performed at the end of the recording data 41, and the recording data 42, 43,. Is made an integer multiple of 32 bytes.

  The values of the data size information 33, the forward direction pointer 34, and the backward direction pointer 35 stored in the access control headers 30_1, 30_2,..., 30_10 (or 30) are based on, for example, 32 bytes as a data transfer unit. It expresses with the value. When the size of the data packet 40 is 3072 bytes and the reference value is 32 bytes, the values of the data size information 33, the forward direction pointer 34, and the backward direction pointer 35 are data transfer units. It is expressed as an integer multiple of 32 bytes, for example, 96 (= 3072/32).

  As described above, according to the recording / reproducing apparatus and the recording / reproducing method of the eighth embodiment, the top positions of the data packets 40_1, 40_2,. The address of the head position can be expressed by a value that is an integral multiple of the data transfer unit. Therefore, the data size information 33, the forward direction pointer 34, and the backward direction pointer 35 can be expressed as data having a smaller data size, and the data size of the access control header 30 can be reduced. When the data size of the access control header 30 is reduced, the recording area of the recording data 41 is increased, so that the recording efficiency of the recording medium 11a can be improved.

  Further, the start pointers 81, 82, and 83 and the end pointers 84, 85, and 86 of the pointer packet 80 described in the first embodiment are expressed by values that are integral multiples of the data transfer unit. Recording efficiency can be further improved.

  Further, by expressing the address information of the mapping data provided in the management data area 11b described in the seventh embodiment by a value that is an integral multiple of the data transfer unit, the recording efficiency of the recording medium 11a can be further improved. it can.

Embodiment 9 FIG.
FIG. 20 is a block diagram schematically showing a configuration of a recording / reproducing apparatus 1900 according to the ninth embodiment (that is, an apparatus capable of performing the recording / reproducing method according to the ninth embodiment) according to the present invention. 20, the same reference numerals are given to the same or corresponding components as those in FIG. In the recording / reproducing apparatus 1900 of the ninth embodiment, the external information input unit 21 and the external information encoding unit 22 of the first embodiment are replaced with the network receiving unit 25, and the external information decoding unit 23 and the external information output of the first embodiment are replaced. It differs from the recording / reproducing apparatus 1100 of Embodiment 1 in that the unit 24 is replaced with the network transmission unit 26. Note that FIG. 20 shows only a main configuration among the configurations provided as part of the recording / reproducing apparatus 1900.

  A video signal output from a video signal generation unit (not shown) such as a camera is input to each of the video input units 2 and 3. The video input unit 2 receives the Ch-1 video signal, and the video input unit 3 receives the Ch-2 video signal. Each of the video encoding units 4 and 5 receives the video signal input to each of the video input units 2 and 3, and encodes the received video signal to generate video data. An audio signal output from an audio signal generator (not shown) such as a microphone is input to the audio input unit 6. The audio encoding unit 7 receives the audio signal input from the audio input unit 6, encodes the received audio signal, and generates audio data. These configurations are the same as those in the first embodiment. Therefore, the configuration of the recording / reproducing apparatus and the recording / reproducing method of the second to eighth embodiments can be applied to the recording / reproducing apparatus 1900 of the ninth embodiment.

  An external device (not shown in FIG. 20) such as an elevator control device and a network camera (encoding device) is connected to the network reception unit 25 via a network such as a wired LAN or a wireless LAN. The network receiving unit 25 receives recording data 41 (shown in FIG. 2) from an external device via the network. The recording data 41 received by the network receiver 25 may be any of video data, audio data, or other data obtained by encoding a signal other than the video signal and the audio signal.

  The mapping data generation unit 111 generates mapping data based on any of the video data generated by the encoding unit 1901, the audio data generated by the encoding unit 1901, and the external device data received by the network receiving unit 25. To do.

  The data multiplexing unit 8 adds, to the recording data 41 (shown in FIG. 2), a common access control header 30 having the same information item for each predetermined data range regardless of the type of data. A mapping information footer 36 is added to generate a data packet having an indefinite data length, and the generated data packet is multiplexed. Here, the recording data 41 includes at least one of video data obtained by encoding a video signal, audio data obtained by encoding an audio signal, data received by the network receiving unit 25, and mapping data.

  The management information generation unit 27 generates management information related to data recorded in the data recording area 11c (shown in FIG. 3) in the recording medium 11a.

  The information item of the access control header 30 of the data packet 40 includes control information used for control of reading the media packet. The contents of this control information may be given by the data multiplexing unit 8 or may be given by the control information generating unit 9. Thereafter, the data recording unit 10 continuously records the data packets 40 (shown in FIG. 2) generated by the data multiplexing unit 8 in the data recording area 11c.

  When reproducing the data packet 40 recorded in the data recording area 11c in the recording medium 11a, a data extraction unit 29 including the control information reading unit 12, the data reading unit 14, and the management information reading unit 28 is provided. Based on the control information in the access control header 30, the data packet 40 is read. In the ninth embodiment, the control information reading unit 12 searches the control information of the data packet 40 recorded in the data recording area 11c for the control information that matches the desired control information, and reads the read data packet 40. Identify.

  The recording data 41 read by the data reading unit 13 is separated by the data separation unit 14 and sent to any one of the video decoding units 15 and 16, the audio decoding unit 19, and the network transmission unit 26. The network transmission unit 26 transmits the data packet 40 read based on the control information to, for example, an external device via the network.

  As described above, according to the recording / reproducing apparatus 1900 and the recording / reproducing method of the ninth embodiment, the data packet is obtained by adding the access control header 30 and the mapping information footer 36 to the recording data 41 received via the network. 40 can be recorded on the recording medium 11a. Therefore, according to the ninth embodiment, data sent from a remote device can be recorded by the recording / reproducing device 1900, and the recording data 41 recorded on the recording / reproducing device 1900 can be recorded on the network. Can be transmitted to a remote location through a remote device and played back by a remote device.

  The recording / reproducing apparatus 1900 has the same configuration as the recording / reproducing apparatus 1100 of the first embodiment except for the network receiving unit 25 and the network transmitting unit 26. Therefore, not only one external device data and one video data are associated with each other but also one external device data and a plurality of video data are associated with each other, a plurality of external devices. Data and one video data can be associated with each other, and a plurality of external device data and a plurality of video data can be associated with each other. Thus, when referring to the external device data to be searched, the image data related to the external device data to be searched is automatically selected and displayed by the display device (if the user does not designate it at any time). (Not shown). Therefore, according to the recording / reproducing apparatus 1900 and the recording / reproducing method of the ninth embodiment, the user's work can be greatly reduced when viewing the recording data recorded on the recording medium 11a, and the recording data can be shortened. The necessary data can be confirmed in time.

  In the above description, the recording data 41 received by the network receiving unit 25 and recorded in the data recording area 11c is read by the data reading unit 13, and the read recording data 41 is read by the network transmitting unit 26. The configuration for transmitting to the outside has been described. However, the recording data 41 received by the network receiving unit 25 and recorded in the data recording area 11 c is decoded by the decoding unit 1902, and the video output units 17 and 18, the audio output unit 20, and the external information output unit 24. It is also possible to output from either. In this way, for example, the user can view or browse the recording data 41 encoded by a remote device on a display device connected to the recording / playback device 1900.

  Further, in the ninth embodiment, the recording data 41 encoded by the encoding unit 1901 and recorded in the data recording area 11c of the recording medium 11a is read by the data reading unit 13, and the read recording data 41 is read. The network transmission unit 26 may transmit the data to the outside. In this way, a remote user can view or browse the recording data 41 recorded on the recording medium 11a with a remote device connected to the network.

  2,3 video input unit, 4,5 video encoding unit, 6 audio input unit, 7 audio encoding unit, 8 data multiplexing unit, 9 control information generation unit, 10 data recording unit, 11 data storage unit, 11a recording Medium, 11b management data area, 11c data recording area, 12 control information reading section, 13 data reading section, 14 data separation section, 15, 16 video decoding section, 17, 18 video output section, 19 audio decoding section, 20 audio output Unit, 21 external information input unit, 22 external information encoding unit, 23 external information decoding unit, 24 external information output unit, 25 network receiving unit, 26 network transmitting unit, 27 management information generating unit, 28 management information reading unit, 29 Data extraction unit, 30 access control header, 31 ID information, 32 date and time information, 3 34, 34_1,..., 34_8 forward pointer, 35, 35_1,..., 35_8 backward pointer, 36 mapping information footer, 40 data packet, 41 recording data, 42 I-frame video with channel number 1 Data, 43 I-frame video data with channel number 2 44, 46 P-frame video data with channel number 1 45, 49 Audio data with channel number 1 47, 50 External device data 48 Channel number 2 Video data of number P frame, 51 mapping data, 80 pointer packet, 81, 82, 83 start pointer, 84, 85, 86 end pointer, 89 divided data recording area, 90 group area, 101 divided section minimum date and time information (common) ) , 102 Divided section maximum date / time information (common), 103, 104, 105 Divided section minimum date / time information (individual), 106, 107, 108 Divided section maximum date / time information (individual), 109 Data search table, 110 Pointer to mapping data Table, 111 mapping data generation unit, 112 output timing control unit, 113 position information acquisition unit, 114 individual time information extraction unit, 120 building, 121 elevator, 122 elevator car, 130,..., 135 camera, 141 room, 142 pan tilt zoom Camera, 143, 144, 145 External device, 146, 147, 148 Camera, 151 area, 152 External device, 153, ..., 156 Camera, 1100, 1900 Recording / playback device, 1101, 1901 Encoding unit, 1102, 1902 Decoding unit.

Claims (21)

A control information generation unit that acquires encoded data and common date and time information, and generates control information related to the data;
A first data processing unit that adds a header having the control information to the data for each predetermined data range and generates a plurality of first packets of indefinite data length;
A second data processing unit that generates mapping data indicating an association between the plurality of first packets, adds a header having the control information to the mapping data, and generates a second packet;
A management information generating unit that generates management information of a plurality of data packets including the plurality of first packets and the second packet;
A recording unit for recording the plurality of data packets and the management information on a recording medium having a data recording area for recording the plurality of data packets and a management data area for recording the management information;
A data extraction unit that reads the plurality of data packets recorded in the data recording area based on the control information and the management information;
A decoding unit for decoding the plurality of read data packets,
Each of the control information of the plurality of data packets includes ID information for specifying a type of data included in the data packet including the control information, and date / time information indicating a date / time when the data packet including the control information is recorded. And a size information indicating a data size of a data packet including the control information.   The recording / reproducing apparatus according to claim 1, further comprising an encoding unit that generates the encoded data from an input signal.   Each of the plurality of data packets includes one of video data, audio data, external device data generated by an external device, and the mapping data as the data included in the data packet. The recording / reproducing apparatus according to claim 1 or 2. The second packet including the mapping data is:
A plurality of lists that store recording position information of one piece of external device data on the recording medium and that store one or more pairs of ID information and address information of data associated with the external device data are collected. A mapping data packet to be configured,
4. The recording / reproducing apparatus according to claim 1, wherein each of the lists includes a unique list number in the same mapping data packet. 5. The data packet including video data or the data packet including audio data includes ID information of the mapping data packet and a list number indicating the list in the mapping data packet. Item 5. The recording / reproducing apparatus according to Item 4. A position information acquisition unit that extracts position information indicating position information and / or state information of a plurality of external devices that have generated the data or the input signal from the encoded data or the input signal;
6. The association between video data and external device data using the mapping data packet is dynamically changed based on position information of each of the plurality of external devices. Recording and playback device. A position information acquisition unit that extracts position information indicating position information and / or state information of a plurality of external devices that have generated the data or the input signal from the encoded data or the input signal;
6. The association between video data and external device data using the mapping data packet is dynamically changed based on date and time information of each of the plurality of external devices. 2. The recording / reproducing apparatus according to item 1.
6. The recording / reproducing apparatus according to claim 4 or 5, wherein an association target of the video data and the external device data using the mapping data packet is dynamically changed based on. 8. The recording / reproducing apparatus according to claim 4, wherein the list information of the mapping data packet includes attribute information indicating whether or not the data exists for each list. The control information is
Address information relatively indicating the position of the data packet generated immediately after the generation time of the data packet including the control information among the data packets including the ID information that matches the ID information of the control information; ,
Address information relatively indicating the position of the data packet generated before the generation time of the packet including the control information among the data packets including the ID information that matches the ID information of the control information. The recording / reproducing apparatus according to claim 1, comprising: An individual time information extraction unit that extracts individual date and time information from the encoded data or the input signal;
The data recording area has a plurality of divided data recording areas divided at regular data intervals,
The management information generating unit generates group management information for each group including a plurality of continuous divided data recording areas,
The recording unit records the group management information in the management information recording unit;
The group management information is
About the data recorded in the group, data presence / absence information for each ID information,
Common minimum date information and common maximum date information based on the common date information;
The recording / reproducing apparatus according to claim 1, comprising: individual minimum date information and individual maximum date information based on the individual date information extracted by the individual time information extraction unit. . The recording / reproducing apparatus according to claim 10, wherein ID information of the mapping data and recording position information of the mapping data are stored in the group management information. The top data packet of the divided data recording area is:
For each ID, head address information indicating a position where a data packet having the ID first appears in the divided data recording area;
End address information indicating a position at which the data packet having the ID appears last in the divided data recording area;
The minimum date and time information based on the common date and time information for each data included in the range of the divided data recording area; and
The maximum date and time information based on the common date and time information regarding each data included in the range of the divided data recording area,
The recording / reproducing apparatus according to claim 10 or 11, including the individual minimum date information and the individual maximum date information of each ID information included in the range of the divided data recording area. The recording / reproducing apparatus according to any one of claims 1 to 12, wherein the data size of each of the data packets is a discrete value. The recording / reproducing apparatus according to any one of claims 1 to 13, further comprising a network receiving unit that receives the encoded data from outside via a network. The recording / reproducing apparatus according to claim 1, further comprising a network transmission unit configured to transmit the data packet read from the recording medium to the outside via a network. A recording / reproducing method executed by the recording / reproducing apparatus,
Obtaining encoded data and common date and time information;
Generating control information relating to the data;
Adding a header having the control information to the data for each predetermined data range, and generating a plurality of first packets of indefinite data length;
Generating mapping data indicating an association between the plurality of first packets, adding a header having the control information to the mapping data, and generating a second packet;
Generating management information of a plurality of data packets comprising the plurality of first packets and the second packets;
Recording the plurality of data packets and the management information on a recording medium having a data recording area in which the plurality of data packets are recorded and a management data area in which the management information is recorded;
Reading the plurality of data packets recorded in the data recording area based on the control information and the management information;
Decoding the plurality of read data packets; and
Each of the control information of the plurality of data packets includes ID information for specifying a type of data included in the data packet including the control information, and date / time information indicating a date / time when the data packet including the control information is recorded. And a size information indicating a data size of a data packet including the control information. The second packet including the mapping data is:
A plurality of lists that store recording position information of one piece of external device data on the recording medium and that store one or more pairs of ID information and address information of data associated with the external device data are collected. A mapping data packet to be configured,
The recording / reproducing method according to claim 16, wherein each of the lists includes a unique list number in the same mapping data packet. The data packet including video data or the data packet including audio data includes ID information of the mapping data packet and a list number indicating the list in the mapping data packet. Item 18. The recording / reproducing method according to Item 17. A step of extracting, from the encoded data, position state information indicating position information and / or state information of a plurality of external devices that have generated the data;
The association between the video data and the external device data using the mapping data packet is dynamically changed based on position information of each of the plurality of external devices. Recording and playback method. A step of extracting, from the encoded data, position state information indicating position information and / or state information of a plurality of external devices that have generated the data;
The association between video data and external device data using the mapping data packet is dynamically changed based on date and time information of each of the plurality of external devices. Recording and playback method. Extracting individual date and time information from the encoded data;
Generating group management information for each group including a plurality of divided data recording areas divided at regular data intervals in the data recording area;
Recording the group management information in the management information recording unit;
The group management information is
About the data recorded in the group, data presence / absence information for each ID information,
Common minimum date information and common maximum date information based on the common date information;
21. The recording / reproducing method according to claim 16, further comprising: individual minimum date information and individual maximum date information based on the individual date information extracted by the individual time information extraction unit. .

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