JP3126029U - Optical disc recording / reproducing apparatus - Google Patents

Abstract

An optical disc recording / reproducing apparatus capable of storing thumbnail image data and increasing the display speed of thumbnail images without providing a dedicated buffer memory for storing thumbnail image data.
When an optical disc is inserted and stopped, and a thumbnail saving flag is off, image data is read from the optical disc and thumbnail image data is generated. The thumbnail image data is stored together with the identification information in the recording buffer memory. When the storage of the thumbnail image data for all titles is completed, the flag is turned on. When the thumbnail list display request is received, the identification information in the memory matches the identification information of the optical disc, and when the flag is on, the thumbnail image data of the memory is sent to the display buffer memory, and the display A thumbnail image is displayed on the device.
[Selection] Figure 1

Description

  The present invention relates to an optical disc recording / reproducing apparatus that records information on an optical disc or reproduces information recorded on an optical disc, and more particularly, to processing for displaying a thumbnail image.

  2. Description of the Related Art Conventionally, there is known an optical disc recording / reproducing apparatus that is a DVD recorder that records video data such as a television program on a DVD (Digital Versatile Disc) or reproduces video data recorded on a DVD. . In such a conventional optical disc recording / reproducing apparatus, when, for example, a television program recorded on a DVD is reproduced, if there is a request for displaying a thumbnail list by operating an operation unit such as a remote controller, a digest of the recorded video data is A list of thumbnail images as screens is displayed on the display device.

  The thumbnail image is a still image in any one of a head screen for each title (program), a head screen for each chapter, and an arbitrary scene. The thumbnail list display screen displays a plurality of thumbnail images side by side on a display device, and can list a part of still images of video data by title and chapter recorded on a DVD. By referring to the thumbnail images displayed in the list and selecting a desired title or chapter, the video data is reproduced by jumping to a frame corresponding to the title or the chapter.

  Here, a procedure for displaying a thumbnail image on a display device by a conventional optical disc recording / reproducing apparatus will be described.

  Insert a DVD in which information to be reproduced is recorded into the apparatus. When the user operates the operation unit to display a menu screen on the display device and makes a thumbnail list display request by operating the operation unit in order to perform title selection, chapter selection, etc., it is recorded in a frame in a specific area of the DVD. Navigation information is loaded. The navigation information is also referred to as TOC (table of content) information, and is various information such as titles, chapters, recording times, and frame positions of video data such as programs and music recorded on a DVD. A thumbnail image is created based on the information.

In this optical disc recording / reproducing apparatus, image data is read for each title or chapter, decoded after arithmetic processing, creating still image data, and converting the still image data into thumbnail image data. The thumbnail image data is binary data stored in the memory. A thumbnail list display request and what is displayed on the display device based on the thumbnail image data is a thumbnail image. By displaying a plurality of thumbnail images on the display device, a thumbnail list display screen is displayed. When the user selects a thumbnail image such as a program that the user wants to watch with reference to the thumbnail image, the thumbnail image is linked to the navigation information, so the title or chapter video corresponding to the thumbnail image is read. The playback of the title or chapter is started.
JP 2004-228714 A JP 2005-5793 A

  In such a conventional optical disc recording / reproducing apparatus, whenever a thumbnail image display request is made, still image data is created from the inserted DVD and the thumbnail image is displayed on the display device. Since it takes time from reading the necessary image data to displaying the thumbnail images, it takes a long time to display a list of thumbnail images.

  Therefore, in order to solve the above problem, in the prior art of Patent Document 1, when reproducing a DVD, thumbnail image data is created and stored in a storage buffer, and the thumbnail image data for the DVD that has been reproduced once is stored in the storage buffer. Therefore, it is possible to display the thumbnail image immediately by reading the thumbnail image data from the storage buffer without acquiring the thumbnail image data from the DVD to be played back. . However, this conventional technique can display thumbnail images immediately by storing thumbnail image data for a DVD that has been reproduced once in a storage buffer and reading the thumbnail image data from the storage buffer. When the DVD information is reproduced for the first time after the information is recorded, the thumbnail image data is not stored in the storage buffer, so that the thumbnail image cannot be displayed immediately. . If a storage buffer having a large storage capacity is not prepared, there is a possibility that the capacity will be insufficient. If a storage buffer is newly provided, the cost will be increased accordingly.

  In the prior art of Patent Document 2, information such as a TOC, a playlist, and metadata on a storage medium (optical disk) is copied and stored in a management recording medium (flash memory), thereby moving images and still images. Although it enables search of audio contents and simple list display, it does not increase the display speed of thumbnail images in this case.

  The present invention has been made to solve the above-described problems, and can save thumbnail image data without providing a dedicated buffer memory for storing thumbnail image data. An object of the present invention is to provide an optical disc recording / reproducing apparatus capable of increasing the speed of the recording medium.

  In order to achieve the above object, the invention of claim 1 is characterized in that flag off determination means for determining whether or not a thumbnail saving flag is off when an optical disc is inserted and in a stopped state, and the thumbnail saving flag includes Thumbnail generation instruction means for giving a thumbnail generation instruction to a thumbnail generation unit that reads image data from the optical disc and generates thumbnail image data when it is determined to be off, and the generation information together with identification information in the recording buffer memory Thumbnail storage means for storing the thumbnail image data, storage completion determination means for determining whether or not the thumbnail image data for all titles has been stored in the recording buffer memory, and storage in the recording buffer memory When it is determined that the thumbnail has been completed, the thumbnail saving flag is turned off. When the identification information is read from the inserted optical disk and a thumbnail list display request is received, it is determined whether the identification information in the recording buffer memory matches the identification information of the optical disk. Identification information determining means, flag on determining means for determining whether or not the thumbnail storage flag is on when it is determined that the identification information in the recording buffer memory matches the identification information of the optical disc, Thumbnail display processing means for displaying a thumbnail image on the display device by sending the thumbnail image data stored in the recording buffer memory to the display buffer memory when it is determined that the thumbnail storage flag is on. Light having a thumbnail control unit having To provide a disk recording and reproducing apparatus.

  In this configuration, when the optical disk is inserted into the apparatus and the apparatus is in a stopped state (a state in which no recording operation is performed or a state in which the finalizing operation is not performed), the flag-off determination unit has the thumbnail storage flag turned off. It is determined whether or not. When it is determined that the thumbnail saving flag is off, the thumbnail generation instruction means gives a thumbnail generation instruction to the thumbnail generation unit, whereby the thumbnail generation unit reads the image data from the optical disc, and the thumbnail image Generate data. Next, the thumbnail storage means stores the generated thumbnail image data together with the identification information in the recording buffer memory. When the storage completion unit determines that the storage of the thumbnail image data for all titles in the recording buffer memory is complete, the flag-on unit turns on the thumbnail storage flag.

  When the optical disk is inserted into the apparatus and a thumbnail list display request is received, the identification information determination unit determines whether or not the identification information in the recording buffer memory matches the identification information of the optical disk. When it is determined that the identification information in the recording buffer memory matches the identification information of the optical disc, the flag-on determination means determines whether or not the thumbnail storage flag is on. When it is determined that the thumbnail storage flag is on, the thumbnail display processing means sends the thumbnail image data stored in the recording buffer memory to the display buffer memory and displays the thumbnail image on the display device. Let

  According to this configuration, the thumbnail image data can be stored in the existing recording buffer memory without providing a dedicated buffer memory for storing the thumbnail image data. Even when the desired information is recorded on the optical disc and the information on the optical disc is reproduced for the first time after the desired information is recorded on the optical disc, the recording buffer memory has a thumbnail in the stop state. Since the image data is stored and the thumbnail image data is already stored, the thumbnail image can be displayed immediately by reading the thumbnail image data from the recording buffer memory.

  According to a second aspect of the present invention, when an optical disc is inserted and stopped, image data is read from the optical disc, thumbnail image data is generated, and the generated thumbnail image data is stored in a recording buffer memory. A thumbnail control unit is provided for displaying a thumbnail image on a display device by sending thumbnail image data stored in the recording buffer memory to the display buffer memory when a list display request is received. An optical disc recording / reproducing apparatus is provided.

  In this configuration, when an optical disc is inserted and in a stopped state, image data is read from the optical disc, thumbnail image data is generated, and the generated thumbnail image data is stored in a recording buffer memory. When the thumbnail list display request is received, the thumbnail image data stored in the recording buffer memory is sent to the display buffer memory, so that the thumbnail image is displayed on the display device.

  According to this configuration, the thumbnail image data can be stored in the existing recording buffer memory without providing a dedicated buffer memory for storing the thumbnail image data. Even when the desired information is recorded on the optical disc and the information on the optical disc is reproduced for the first time after the desired information is recorded on the optical disc, the recording buffer memory has a thumbnail in the stop state. Since the image data is stored and the thumbnail image data is already stored, the thumbnail image can be displayed immediately by reading the thumbnail image data from the recording buffer memory.

  According to a third aspect of the present invention, in the second aspect of the invention, the thumbnail control unit reads the image data from the optical disc and generates thumbnail image data when the optical disc is inserted and in a stopped state. A thumbnail generation instruction means for giving a thumbnail generation instruction; a thumbnail storage means for storing the generated thumbnail image data together with identification information in the recording buffer memory; and storing thumbnail image data for all titles in the recording buffer memory. And a storage completion judging means for judging whether or not the recording is completed, and when reading the identification information from the inserted optical disk and receiving a thumbnail list display request, the identification information in the recording buffer memory is the identification information of the optical disk. Identification information format that determines whether or not the information matches And a display device by sending thumbnail image data stored in the recording buffer memory to the display buffer memory when it is determined that the identification information in the recording buffer memory matches the identification information of the optical disk. And thumbnail display processing means for displaying thumbnail images.

  Therefore, the thumbnail control unit can realize thumbnail generation processing, thumbnail storage processing, storage completion determination processing, identification information determination processing, and thumbnail display processing, thereby eliminating the need for a dedicated buffer memory for storing thumbnail image data. However, the thumbnail image data can be stored in the existing recording buffer memory, and even after the desired information is recorded on the optical disc, the recording buffer memory is stopped even when the information on the optical disc is reproduced for the first time. The thumbnail image data is saved in the state, and the thumbnail image can be displayed immediately.

  In the invention of claim 4, in the invention of claim 2, the thumbnail control unit, flag off determination means for determining whether or not the thumbnail storage flag is off when the optical disk is inserted and is in a stopped state; When it is determined that the thumbnail saving flag is off, a thumbnail generation instructing unit that gives a thumbnail generation instruction to a thumbnail generation unit that reads image data from an optical disc and generates thumbnail image data is identified by a recording buffer memory Thumbnail storage means for storing the generated thumbnail image data together with information, storage completion determination means for determining whether or not the thumbnail image data for all titles has been stored in the recording buffer memory, and the recording When it is determined that saving to the buffer memory is completed, The flag-on means for turning on the thumbnail saving flag and the identification information in the recording buffer memory match the identification information of the optical disc when receiving the thumbnail list display request after reading the identification information from the inserted optical disc Identification information determination means for determining whether or not the thumbnail storage flag is on when it is determined that the identification information in the recording buffer memory matches the identification information of the optical disc. A thumbnail that causes the display device to display a thumbnail image by sending the thumbnail image data stored in the recording buffer memory to the display buffer memory when it is determined that the thumbnail storage flag is on; Display processing means.

  Therefore, the thumbnail control unit can implement flag-off determination processing, thumbnail generation processing, thumbnail storage processing, storage completion determination processing, identification information determination processing, flag-on determination processing, and thumbnail display processing, thereby storing thumbnail image data. Even if a dedicated buffer memory is not provided, thumbnail image data can be stored in an existing recording buffer memory, and after the desired information is recorded on the optical disc, the information on this optical disc is reproduced for the first time. In the recording buffer memory, thumbnail image data is stored in the stop state, and the thumbnail image can be displayed immediately. The thumbnail control unit determines whether to generate thumbnail image data and save the thumbnail image data in the recording buffer memory by turning on / off the thumbnail saving flag, and whether to send the thumbnail image data to the display buffer memory. The determination can be performed specifically.

  As described above, according to the present invention, when the optical disc is inserted and in a stopped state, the flag off determination means for determining whether or not the thumbnail storage flag is off, and the thumbnail storage flag is determined to be off. The thumbnail generation instruction means for reading the image data from the optical disc and giving a thumbnail generation instruction to the thumbnail generation unit for generating the thumbnail image data, and the generated thumbnail image data together with the identification information in the recording buffer memory. Thumbnail storage means for saving, storage completion determination means for determining whether or not the thumbnail image data for all titles has been stored in the recording buffer memory, and determination that storage in the recording buffer memory has been completed Flag on to turn on the thumbnail save flag when And identification information for determining whether or not the identification information in the recording buffer memory matches the identification information of the optical disc when receiving a thumbnail list display request after reading the identification information from the inserted optical disc A determination unit; a flag-on determination unit that determines whether or not the thumbnail storage flag is on when it is determined that the identification information in the recording buffer memory matches the identification information of the optical disc; and the thumbnail storage flag Thumbnail display processing means for displaying thumbnail images on a display device by sending thumbnail image data stored in the recording buffer memory to the display buffer memory when it is determined that is turned on. To save thumbnail image data Even without providing a dedicated buffer memory, thumbnail image data can be stored in the existing recording buffer memory, which can suppress the cost increase due to the addition of memory and increase the display speed of thumbnail images. Moreover, even when the information on the optical disc is reproduced for the first time after the desired information is recorded on the optical disc, the thumbnail image data is stored in the recording buffer memory in the stopped state, and the thumbnail image data has already been stored. Therefore, if the thumbnail image data is read from the recording buffer memory, the thumbnail image can be displayed immediately.

  Further, according to the present invention, when an optical disc is inserted and in a stopped state, image data is read from the optical disc, thumbnail image data is generated, and the generated thumbnail image data is stored in a recording buffer memory, When the thumbnail list display request is received, the thumbnail image data stored in the recording buffer memory is sent to the display buffer memory so as to display the thumbnail image on the display device. Even without providing a dedicated buffer memory for storing image data, thumbnail image data can be stored in an existing recording buffer memory, which can suppress the cost increase due to the addition of memory and reduce the display speed of thumbnail images. It can be faster and more Even when the information on the optical disc is reproduced for the first time after the information is recorded, the thumbnail image data is stored in the recording buffer memory in the stop state, and the thumbnail image data is already stored. Therefore, if the thumbnail image data is read from the recording buffer memory, the thumbnail image can be displayed immediately.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing the configuration of an optical disc recording / reproducing apparatus according to an embodiment of the present invention.

  The optical disc recording / reproducing apparatus includes an optical reading unit 1, a video stream input unit 2, a thumbnail generation unit 3, a video output unit 4, a video stream control unit 5, a thumbnail control unit 6, a display buffer control unit 7, an operation unit 8, A display buffer memory 9, a recording buffer memory 10, an input signal processing unit 11, an optical writing unit 12, and a system controller 13 are provided.

  The optical reading unit 1 optically reads video data (image data) from an optical disc 14 such as a DVD (Digital Versatile Disc) using an optical pickup (not shown). The video stream input unit 2 includes an MPEG decoder and the like, and decodes video data read by the optical reading unit 1. The video data is subjected to signal processing by the video stream control unit 5 and output from the video output unit 4 to a display device 15 such as a television receiver or a monitor device.

  The thumbnail generation unit 3 processes a part of the video data output from the video stream input unit 2 into still image data to create thumbnail image data. The display buffer memory 9 is a memory such as a RAM, and temporarily stores thumbnail image data for displaying thumbnails. In response to a command from the display buffer control unit 7, thumbnail image data is output from the display buffer memory 9 to the video output unit 4.

  The thumbnail control unit 6 controls the thumbnail generation unit 3 to create thumbnail image data under the control of the system controller 13 that operates in accordance with a thumbnail list display request input from the operation unit 8 such as a remote controller or a main body operation panel. The display buffer control unit 7 is controlled to output thumbnail image data to the video output unit 4, and the video output unit 4 is controlled to display a thumbnail list display screen composed of a plurality of thumbnail images. .

  In addition, the thumbnail control unit 6 determines that the thumbnail storage flag is off when the optical disk 14 is inserted and is in a stopped state, flag off determination means for determining whether or not the thumbnail storage flag is off. The thumbnail generation instruction means for reading the image data from the optical disc 14 and generating a thumbnail image data and giving a thumbnail generation instruction to the thumbnail generation unit 3; and the generated thumbnail image together with the identification information in the recording buffer memory 10. Thumbnail storage means for storing data, storage completion determination means for determining whether or not storage of thumbnail image data for all titles in the recording buffer memory 10 has been completed, and storage in the recording buffer memory 10 has been completed. When it is determined that the thumbnail saving flag is on A flag-on means for determining whether or not the identification information in the recording buffer memory 10 matches the identification information of the optical disc 14 when receiving a thumbnail list display request after reading the identification information from the inserted optical disc 14. Identification information determination means for determining, and flag on determination means for determining whether or not the thumbnail storage flag is on when it is determined that the identification information in the recording buffer memory 10 matches the identification information of the optical disc 14; When it is determined that the thumbnail storage flag is ON, thumbnail display for displaying thumbnail images on the display device 15 by sending the thumbnail image data stored in the recording buffer memory 10 to the display buffer memory 9 And processing means.

  The recording buffer memory 10 is a memory such as an SDRAM, and is used for storing thumbnail image data when the apparatus is in a steady state (the optical disk 14 is inserted and stopped), in addition to being used during recording. The In an optical disk recording / reproducing apparatus (DVD recorder), since a recording operation is also performed, a recording buffer area is secured in the recording buffer memory 10 by several tens of MB. During the recording operation, the recording buffer memory 10 is used, but during the reproducing operation, the recording buffer memory 10 is not used at all, so that it can be used to store thumbnail image data.

  The thumbnail image data acquired from the optical disk 14 is stored by the command from the thumbnail control unit 6, and the thumbnail image data is output to the display buffer memory 9. Identification information for identifying the optical disk 14 is added to the thumbnail image data, and this identification information is linked to navigation information of the optical disk 14.

  Examples of identification information for discriminating individual optical disks include total recording time, title, chapter, time information of each title and chapter, and the like. One or more of these pieces of information are combined to form identification information, which is stored in the recording buffer memory 10 together with thumbnail image data. The thumbnail control unit 6 confirms whether the identification information of the thumbnail image data stored in the recording buffer memory 10 matches the identification information of the inserted optical disk 14, and determines whether or not the thumbnail image data is stored. Make a decision. In this way, it is possible to determine which optical disk the thumbnail image data is based on the identification information. Therefore, thumbnail image data for a plurality of optical disks can be stored in the recording buffer memory 10.

  Although not shown, the input signal processing unit 11 performs A / D conversion for converting an analog video / audio signal of a television broadcast selected by a tuner or a video / audio signal from another video / audio output device into digital video / audio data. It has a circuit and an encoder that encodes the video / audio data in the MPEG system, and performs the preceding signal processing necessary for recording the video / audio signal input to the apparatus on the optical disk 14. The recording buffer memory 10 receives the encoded video / audio data from the input signal processing unit 11 during recording and temporarily stores a predetermined amount thereof. The stored encoded video / audio data is output to the optical writing unit 12. The

  The optical writing unit 12 is a recording data modulation circuit (not shown) that modulates the encoded video / audio data from the recording buffer memory 10 to record it on the optical disc 14, and an optical pickup based on the modulated data. A laser modulation circuit (not shown) for outputting a laser modulation signal for modulating laser light emitted from (not shown) to the optical pickup is provided, and video / audio data is optically recorded on the optical disk 14.

  FIG. 2 is a flowchart for explaining processing until the optical disc recording / reproducing apparatus of this embodiment stores thumbnail image data in the recording buffer memory in a steady state. With reference to this flowchart and FIG. 1, description will be given of processing until the optical disc recording / reproducing apparatus stores thumbnail image data in the recording buffer memory in a steady state.

  First, the system controller 13 determines whether or not the optical disk 14 is inserted into the apparatus and the apparatus is in a stationary state where the apparatus is in a stopped state (a state where no recording operation or a finalizing operation is performed) ( Step S1). When it is determined that the optical disk 14 is inserted into the apparatus and is in the stopped state, the flag-off determination unit of the thumbnail control unit 6 determines whether or not the thumbnail storage flag is off (step S2). The thumbnail storage flag is set in, for example, a register. If the value of the flag is logic “1”, it indicates ON, and if the value is logic “0”, it indicates OFF.

  When it is determined that the thumbnail saving flag is off, the thumbnail generation instruction means of the thumbnail control unit 6 gives a thumbnail generation instruction to the thumbnail generation unit 3, whereby the thumbnail generation unit 3 causes the optical disc 14 to Thus, the image data is read to generate thumbnail image data (step S3). Next, the thumbnail storage means of the thumbnail controller 6 stores the generated thumbnail image data together with the identification information in the recording buffer memory 10 (step S4). In the processes of steps S3 and S4, when information is recorded on the optical disc 14, the recording buffer memory 10 is used at this time, so the thumbnail image data stored in the recording buffer memory 10 is Although it is overwritten and erased by the recording information, thumbnail image data is generated again by the thumbnail generation unit 3 after the recording is stopped, and the thumbnail image data is stored in the recording buffer memory 10 by the thumbnail storing means.

  When the processing of step S3 and step S4 is repeated and the storage completion unit of the thumbnail control unit 6 determines that the storage of the thumbnail image data for all titles in the recording buffer memory 10 is complete (step S5), the thumbnail control unit 6 The flag on means turns on the thumbnail storage flag when it is determined that the storage of the thumbnail image data for all the titles in the recording buffer memory 10 has been completed (step S6).

  FIG. 3 is a flowchart for explaining processing for displaying a thumbnail image when the optical disc recording / reproducing apparatus of the present embodiment receives a thumbnail list display request. A process for displaying a thumbnail image when the optical disc recording / reproducing apparatus receives a thumbnail list display request will be described with reference to this flowchart and FIG.

  First, when the optical disk 14 whose information is to be reproduced is inserted into the apparatus, the identification information determination unit of the thumbnail control unit 6 reads the identification information of the inserted optical disk 14 via the optical reading unit 1 and the video stream input unit 2. (Step N1) After that, when a thumbnail list display request is received (Step N2), it is determined whether or not the identification information at a predetermined position in the recording buffer memory 10 matches the identification information on the optical disk 14. (Step N3).

  When it is determined that the identification information of the predetermined position in the recording buffer memory 10 matches the identification information of the optical disc 14, the flag-on determination unit of the thumbnail control unit 6 determines whether or not the thumbnail storage flag is on. (Step N4). When it is determined that the thumbnail storage flag is on, the thumbnail display processing means of the thumbnail control unit 6 stores the thumbnail image data stored at a predetermined position in the recording buffer memory 10 in the display buffer memory 9. (Step N5) and temporarily stored in the display buffer memory 9. Thereafter, the thumbnail image data is read from the display buffer memory 9 and output to the video output unit 4.

  As a result, the video output unit 4 converts the input thumbnail image data into a display video signal and supplies the video signal to the display device 15 to display the thumbnail image on the display device 15 (step N6). . The processes of Step N5 and Step N6 are repeated until a predetermined number of thumbnail images are displayed on the display device 15. When the predetermined number of thumbnail images are displayed on the display device 15, this process ends.

  If it is determined in step N3 that the identification information at the predetermined position in the recording buffer memory 10 does not match the identification information on the optical disc 14, or in step N4, it is determined that the thumbnail storage flag is off. In this case, the image data is read from the optical disc 14 by the optical reading unit 1 as usual, and the video stream input unit 2, the thumbnail generation unit 3, the display buffer memory 9, and the video output unit 4 perform the above-described operations. A thumbnail image is displayed on the display device 15 (step N8).

  FIG. 4 is a flowchart for explaining conditions for turning off the thumbnail saving flag at the start of recording in the present embodiment. A condition for turning off the thumbnail saving flag at the start of recording will be described with reference to this flowchart and FIG.

  When the recording key of the operation unit 8 is pressed after the optical disk 14 is inserted into the apparatus or when the recording start time by the recording reservation is reached, the system controller 13 sets the apparatus to the recording mode and recording is performed. When started (step A1), in response to this, the thumbnail controller 6 turns off the thumbnail storage flag (step A2). Therefore, in step S2 shown in FIG. 2, it is determined that the thumbnail saving flag is off, and the thumbnail saving flag is turned on through the processing of steps S3 to S5 (step S6).

  FIG. 5 is a flowchart for explaining a condition for turning off the thumbnail saving flag at the start of finalization in the present embodiment. The conditions for turning off the thumbnail saving flag at the start of finalization will be described with reference to this flowchart and FIG.

  After the optical disk 14 is inserted into the apparatus, when the operation unit 8 performs an operation to start finalizing the optical disk 14, the system controller 13 starts finalizing the optical disk 14 (step B1), and in response, a thumbnail is displayed. The control unit 6 turns off the thumbnail saving flag (step B2). Therefore, also in this case, in step S2 shown in FIG. 2, it is determined that the thumbnail saving flag is off, and the thumbnail saving flag is turned on through the processing of steps S3 to S5 (step S6).

  As described above, according to the present embodiment, the thumbnail image data can be stored in the existing recording buffer memory 10 without providing a dedicated buffer memory for storing the thumbnail image data. The display speed of thumbnail images can be increased, and even when desired information is recorded on the optical disc, the information on the optical disc is reproduced for the first time in the recording buffer memory 10. Since the thumbnail image data is saved in the stop state and the thumbnail image data is already saved, when the thumbnail image data is read from the recording buffer memory 10, the thumbnail image is immediately displayed on the display device. 15 can be displayed. In the conventional optical disc recording / reproducing apparatus, the display of thumbnail images on an optical disc (DVD) takes a long time to display because the transfer speed is lower than that of a hard disk. Then, it is possible to increase the display speed of thumbnail images.

  The present invention provides a single DVD recorder (optical disc recording / reproducing apparatus) for recording / reproducing information on / from an optical disc such as a DVD, or a VCR (video cassette) for recording / reproducing information on a video cassette tape. The present invention can be used for a composite recording / reproducing apparatus of a recorder and a DVD recorder, and can increase the display speed of thumbnail images displayed when reproducing information on a DVD.

It is a block diagram which shows the structure of the optical disk recording / reproducing apparatus which concerns on one Embodiment of this invention. 4 is a flowchart for explaining processing until the optical disc recording / reproducing apparatus of the embodiment stores thumbnail image data in a recording buffer memory in a steady state. 6 is a flowchart for explaining processing for displaying a thumbnail image when the optical disc recording / reproducing apparatus of the embodiment receives a thumbnail list display request; 6 is a flowchart for explaining a condition for turning off a thumbnail saving flag at the start of recording in the embodiment. 6 is a flowchart for explaining a condition for turning off a thumbnail saving flag at the start of finalization in the embodiment.

Explanation of symbols

3 Thumbnail generation unit 6 Thumbnail control unit (flag off determination unit, thumbnail generation instruction unit, thumbnail storage unit, storage completion determination unit, flag on unit, identification information determination unit, flag on determination unit, thumbnail display processing unit)
9 buffer memory for display 10 buffer memory for recording 14 optical disk 15 display device

Claims (4)

In an optical disc recording / reproducing apparatus for recording information on an optical disc or reproducing information recorded on an optical disc,
Flag off determination means for determining whether or not the thumbnail saving flag is off when the optical disc is inserted and in a stopped state;
Thumbnail generation instruction means for giving a thumbnail generation instruction to a thumbnail generation unit that reads image data from an optical disc and generates thumbnail image data when it is determined that the thumbnail storage flag is off;
Thumbnail storage means for storing the generated thumbnail image data together with identification information in a recording buffer memory;
Storage completion determination means for determining whether or not the storage of the thumbnail image data for all titles in the recording buffer memory is completed;
Flag on means for turning on the thumbnail storage flag when it is determined that the storage in the recording buffer memory is completed;
Identification information determination means for determining whether or not the identification information in the recording buffer memory matches the identification information of the optical disc when receiving a thumbnail list display request after reading the identification information from the inserted optical disc; ,
Flag on determination means for determining whether or not the thumbnail storage flag is on when it is determined that the identification information in the recording buffer memory matches the identification information of the optical disc;
Thumbnail display processing means for displaying thumbnail images on a display device by sending thumbnail image data stored in the recording buffer memory to the display buffer memory when it is determined that the thumbnail storage flag is on; An optical disc recording / reproducing apparatus comprising: a thumbnail control unit including: In an optical disc recording / reproducing apparatus for recording information on an optical disc or reproducing information recorded on an optical disc,
When an optical disc is inserted and stopped, image data is read from the optical disc, thumbnail image data is generated, the generated thumbnail image data is stored in a recording buffer memory, and a thumbnail list display request is received An optical disc recording / reproducing apparatus comprising: a thumbnail control unit for displaying thumbnail images on a display device by sending thumbnail image data stored in the recording buffer memory to a display buffer memory.   The thumbnail control unit includes a thumbnail generation instruction unit that reads image data from the optical disc and generates thumbnail image data when the optical disc is inserted and in a stopped state, and gives a thumbnail generation instruction to the thumbnail generation unit; Thumbnail saving means for saving the generated thumbnail image data together with identification information in a buffer memory; and a storage completion judging means for judging whether or not the thumbnail image data for all titles has been saved in the recording buffer memory; Identification information determination means for determining whether or not the identification information in the recording buffer memory matches the identification information of the optical disc when receiving a thumbnail list display request after reading the identification information from the inserted optical disc And the knowledge in the recording buffer memory Thumbnail display processing means for displaying a thumbnail image on a display device by sending thumbnail image data stored in the recording buffer memory to the display buffer memory when it is determined that the information matches the identification information of the optical disc The optical disc recording / reproducing apparatus according to claim 2, comprising:   The thumbnail control unit includes a flag-off determination unit that determines whether or not a thumbnail storage flag is off when the optical disc is inserted and is in a stopped state, and when the thumbnail storage flag is determined to be off. A thumbnail generation instruction unit that reads image data from an optical disc and generates a thumbnail image data and gives a thumbnail generation instruction to a thumbnail generation unit; and a thumbnail storage that stores the generated thumbnail image data together with identification information in a recording buffer memory Means for determining whether or not the storage of the thumbnail image data for all titles in the recording buffer memory is complete, and when it is determined that the storage in the recording buffer memory is complete , Flag on hand to turn on the thumbnail save flag And an identification information determination that determines whether or not the identification information in the recording buffer memory matches the identification information of the optical disk when receiving a thumbnail list display request after reading the identification information from the inserted optical disk Means for determining whether or not the thumbnail storage flag is on when it is determined that the identification information in the recording buffer memory matches the identification information of the optical disc, and the thumbnail storage flag Thumbnail display processing means for displaying a thumbnail image on the display device by sending the thumbnail image data stored in the recording buffer memory to the display buffer memory when it is determined to be on. The optical disc recording / reproducing apparatus according to claim 2.

Images