JP3561029B2 - Video recording and playback device - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a video recording / reproducing apparatus, and more particularly to a video recording / reproducing apparatus suitable for editing work such as editing a video signal for television broadcasting.
[0002]
[Prior art]
Conventionally, in the case of cutting and editing an arbitrary video of a plurality or one material, at least two VTRs for reproduction / recording are prepared, cue reproduction is sequentially performed by the VTR for reproduction, and the reproduced video signal is output. Recording is performed by a recording VTR. In such an editing operation, it takes a long time to search for a position, and the recording VTR must be set to a pause state each time the search is performed, so that the operation is complicated.
[0003]
On the other hand, for example, in an editing apparatus for editing a video signal for television broadcasting, an audio signal is handled completely separately from a video signal. For this reason, when audio is handled together with video, an audio recording / reproducing device is required separately from the video recording / reproducing device, and there has been a problem that the cost is high.
[0004]
[Problems to be solved by the invention]
As described above, in the conventional video recording / playback apparatus, when it is necessary to continuously play back any video of any material in cut editing or the like, a cueing time is required for each video, and The operation was complicated on both sides. Further, since audio is handled separately from video, when audio is handled together with video, an audio recording / reproducing device is required separately from the video recording / reproducing device.
[0005]
The present invention has been made in order to solve the above-mentioned problems, and in the case of continuously playing back any video of any material, the start of each video can be instantaneously performed. It is a first object of the present invention to provide a video recording / reproducing apparatus which is easy to operate, and which can handle audio together with video, thereby facilitating video and audio editing work. It is a second object to provide a device.
[0006]
[Means for Solving the Problems]
A video recording / reproducing apparatus according to the present invention includes a semiconductor memory for recording video data, processing instructions including recording, reproduction, and stop of the video data, a recording material number, a reproduction material number, a reproduction start field number, and a reproduction end field number. And an operation input device for inputting video designation information including: a semiconductor memory, wherein write / read addresses for the semiconductor memory are sequentially generated from a given start address value to an end address value or until a stop command is given; An address generation unit for recording / reproducing input video data to / from a memory, and managing the generation address of the address generation unit based on a processing command and video designation information from the operation input device, thereby enabling arbitrary input video data Record from the field to semiconductor memory, and from this semiconductor memory, video data of any material And a controller that reproduces the video data from any field to any field. The controller manages a material number of video data recorded in the semiconductor memory, a field number, and a start address and an end address of each field. A map storage unit for storing a map, and when a recording command is received from the operation input device, the address generation unit refers to the map and instructs a start address value corresponding to the head of an empty area, and When a stop command is received from the device, a recording processing function for instructing an address generation stop is specified, and when a reproduction command is received from the operation input device, the recording process function is specified by video designation information from the operation input device with reference to the map. Start address value of playback start field number and playback end field of material number A first feature that it has to include a reproduction processing function for instructing the end address value of the item.
[0007]
The controller further includes: a video designation information recording unit that stores a plurality of pieces of video designation information input from the operation input device; and, when receiving a reproduction command from the operation input device, sequentially stores the video designation information from the video designation information recording unit. A chain playback processing function is provided for reading the designated information and performing chain playback by designating the start address value of the playback start field number and the end address value of the playback end field number of the material number designated for each piece of video designation information. This is a second feature.
[0008]
An audio compression multiplexing means provided before the input of the semiconductor memory, for compressing the time axis of audio data input together with the video data, multiplexing the input video data, and sending the multiplexed video data to the semiconductor memory; An audio separation / expansion means provided at a subsequent stage for separating time-axis-compressed audio data from video data read from the semiconductor memory, and extending the time axis to restore the original data, and handling the audio data as video data. This is a third feature.
[0009]
The audio compression and multiplexing unit multiplexes the audio data into a blanking period of the video data, and the audio separation and expansion unit separates the audio data from a blanking period of the video data read from the semiconductor memory. This is the fourth feature.
[0010]
[Action]
In the video recording / reproducing apparatus according to the first aspect of the present invention, a processing command including recording, reproduction, and stop of video data, a recording material number, a reproduction material number, a reproduction start field number, and a reproduction end field number are transmitted from the operation input device. When the video specifying information including the video data is input, the address generation unit sequentially generates write / read addresses for the semiconductor memory from a given start address value to an end address value or until a stop command is given. The input video data is recorded / reproduced. At this time, the controller manages the generation address of the address generation section based on the processing command from the operation input device and the video designation information, so that the input video data is recorded in the semiconductor memory from an arbitrary field, and Is reproduced from any field to any field. In particular, in the controller, the memory management map including the material number, the field number, the start address and the end address of each field of the video data recorded in the semiconductor memory is stored in the map storage unit, and the operation is performed by the recording processing function. When a recording command is received from the input device, the start address value corresponding to the head of the empty area is instructed with reference to the map to the address generation unit, and when a stop command is received from the operation input device, the address generation is stopped. When a playback command is received from the operation input device by the playback processing function, the start address of the playback start field number of the material number specified by the video designation information from the operation input device with reference to the map The value and the end address value of the reproduction end field number are designated.
[0011]
In the invention according to the second aspect, the controller further stores a plurality of pieces of video designation information input from the operation input device in a video designation information recording unit, and when a reproduction command is received from the operation input device, the video The chain reproduction can be performed by sequentially reading the video designation information from the designated information recording unit and designating the start address value of the reproduction start field number and the end address value of the reproduction end field number of the material number designated for each video designation information. Like that.
[0012]
In a video recording / reproducing apparatus according to a third aspect of the present invention, an audio compression / multiplexing unit is provided before an input of a semiconductor memory, and an audio separation / expansion unit is provided after an output of the semiconductor memory. The audio data is treated as video data by multiplexing the input video data and writing it to the semiconductor memory, separating the time-axis-compressed audio data from the video data read from the semiconductor memory, expanding the time axis, and restoring the original data. Like that.
[0013]
In the invention according to the fourth aspect, the audio compression / multiplexing means and the audio separation / expansion means use the blanking period of the video data to multiplex the audio data during the blanking period of the video data during recording, and the video data during the reproduction. By separating audio data from the blanking period, audio data can be recorded / reproduced together with video data.
[0014]
【Example】
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS.
FIG. 1 is a block diagram showing the configuration of a video recording / reproducing apparatus according to the present invention. In FIG. 1, reference numeral 11 denotes a video recording RAM (semiconductor memory) serving as a recording medium. A control signal for switching the write / read mode of the RAM 11 and a write / read address are generated by an address generator 12. The address generator 12 is managed by a controller including a CPU (Central Processing Unit) 13, a program memory (ROM) 14, a working memory (RAM) 15, an operation input device 16, and a display device 17.
[0015]
The operation input device 16 is provided with a mode processing command including recording, reproduction, chain reproduction, and stop of video data, a recording material number, a reproduction material number, a reproduction start field number, and a reproduction end field number. Is used for discriminating input.
[0016]
The program memory 14 stores an address management program for each mode such as a recording mode and a reproduction mode in a table form. That is, when receiving a mode command from the operation input device 16, the CPU 3 reads an address management program of a corresponding table from the program memory 14 and executes an address management process.
[0017]
The working memory 15 includes a memory management table storage unit 151 and a chain reproduction table storage unit 152.
The memory management table storage unit 151 converts the material number, field number, start address and end address of each field of the video data recorded in the video recording RAM 11 into a table as shown in FIG. Each material table is created and updated based on a command and information from the CPU 13.
[0018]
In the chain playback mode, the chain playback table storage unit 152 stores the chain playback information in a table by arranging the material numbers for chain playback together with the designated start field and end field in the playback order. is there.
[0019]
The display device 17 functions as a man-machine interface under the control of the CPU 13, and appropriately displays a message instructing an operation input method to an operator, information recorded in the image recording RAM 11, and the like.
[0020]
Video data input to the video recording RAM 11 is performed via a video signal input interface unit 18, and video data output is performed via a video signal output interface unit 19.
[0021]
The input interface unit 18 takes in the video signal on a field basis, converts it into data in a predetermined format, discards data during the blanking period, and sends only valid data to the video recording RAM 11. The output interface unit 19 adds a blanking period to the video data read from the video recording RAM 11, returns the video signal to the original video signal, and sends it to a subsequent processing device (for example, a VTR).
[0022]
Here, the field timing signal obtained by the video signal input interface section 18 is sent to the address generation section 12, and the address generation section 12 responds to the input of this timing signal to output the end address of each field and the next field. Determine the start address.
[0023]
In the above configuration, the processing operation for each mode will be described below.
First, when a recording mode command and a material number are input from the operation input device 16, a material table storage area is secured in the memory management table storage unit 151 of the working memory 15, and the material number, field number, and start address of each field are set. At the same time, the start address and the recording start command are sent to the address generator 12.
[0024]
The address generation unit 12 sets the video recording RAM 11 to the write mode in response to the recording start command, and supplies the write addresses sequentially from the given start address. As a result, the video data from the input interface unit 18 is sequentially written into the video recording RAM 11.
[0025]
That is, when the normal recording mode is designated through the operation input device 16, the CPU 13 receives the recording mode processing program from the program memory 14 and executes the processing. In this mode, the CPU 13 refers to the address management map stored in the working memory 15 to identify a vacant area of the video recording RAM 11 and gives the head address value to the address generation circuit 12 together with a recording mode command.
[0026]
Upon receiving this command, the address generation circuit 12 sets the video recording RAM 11 to the recording state by the write control signal, then generates a write address in order from the top address value, and supplies the write address to the RAM 11 to record the input video data. . At the end of the recording, the CPU 13 updates the address management map of the working memory 15.
[0027]
When the normal playback mode is specified through the operation input device 16 and the target material number and field are specified, the CPU 13 receives the processing program in the normal playback mode from the program memory 14 and executes the processing. In this mode, the CPU 13 refers to the address management map stored in the working memory 15 to read the head address value of the field of the target material, and supplies the value to the address generation circuit 12 together with the normal reproduction mode command.
[0028]
At this time, the address generation circuit 12 sets the video recording RAM 11 to a read state by a read control signal, generates a read address sequentially from the top address value given from the CPU 3, and gives the read address to the RAM 11. As a result, video data can be read from the RAM 11 in order from an arbitrary field.
[0029]
On the other hand, when the chain playback mode is specified through the operation input device 16 and the target material number and field are specified, the CPU 13 receives the processing program in the chain playback mode from the program memory 14 and executes the processing. In this mode, the CPU 13 refers to the address management map stored in the working memory 15 to read the start address value of the field of the target material, and to specify the material number for performing the chain reproduction together with the designated start field and end field. The chain reproduction information is arranged in a table in the reproduction order and stored in the chain reproduction table storage unit 152. Subsequently, chain reproduction information is sequentially read from the storage unit 152, and the start address value of the start field of each material number is supplied to the address generation circuit 12 together with a chain reproduction mode command.
[0030]
At this time, the address generation circuit 12 sets the video recording RAM 11 to a read state by a read control signal, generates a read address in order from the top address value given from the CPU 13, and gives this to the RAM 11. As a result, the video data can be read from the RAM 11 in the designated order from the designated field.
[0031]
As an example, a cut editing operation in which the material B shown in FIG. 3B is inserted into the 100th and 101st fields of the material A shown in FIG. 3A will be described. In this case, as shown in FIG. 3 (b), the material is written into the video recording RAM 11, a material table is created, and an address chain table indicating the playback order of the material is created as shown in FIG. 3 (c). Keep it.
[0032]
By specifying an address chain table at the time of reproduction, as shown in FIG. 3D, reproduction can be performed with the material B inserted between the 100th and 101st fields of the material A. If this reproduced image is recorded using the VTR used at the time of material registration, editing work by one VTR becomes possible.
[0033]
Therefore, the video recording / reproducing apparatus having the above configuration can instantly search for each video even when it is necessary to continuously reproduce any video of any material, for example, by cut editing or the like. Operation can be facilitated on both sides. In addition, the edited video can be recorded and reproduced using the VTR used at the time of recording. In particular, since reproduction is performed from the memory, work such as rewinding in the VTR is not required, so that the efficiency of editing work can be significantly improved.
[0034]
FIG. 4 shows, as a second embodiment, a configuration of a video recording / reproducing apparatus capable of simultaneously recording a video signal and an audio signal. In FIG. 4, the same parts as those in FIG. 1 are denoted by the same reference numerals, and different parts will be mainly described here.
[0035]
First, an audio signal input interface unit 20 is provided separately from the video signal input interface unit 18 described above. The audio signal input interface unit 20 converts an input audio signal into, for example, AES format data, extracts only the effective data, and converts it into a video signal quantization bit number (for example, 8 bits). The output data is sent to the time axis compression unit 21.
[0036]
The time axis compression section 21 performs time axis compression on the input audio data in accordance with the format of the video signal. The output is sent to the multiplexing circuit section 22 and output from the video signal input interface section 18. After being multiplexed with the video data (for example, a blanking period of the video data), it is sent to the video recording RAM 11. That is, the audio data is treated as a part of the video data, and is recorded in the video recording RAM 11 according to the address control of the address generation unit 12.
[0037]
On the other hand, the read data from the video recording RAM 11 is sent to the separation circuit section 23 and separated into video data and audio data. The separated video data is sent to the video signal output interface unit 18 described above. Further, the audio data is subjected to time-axis expansion reverse to that at the time of recording by the time-axis expansion unit 24 to be converted into continuous data, and then returned to the original audio signal by the audio signal output interface unit 25, and the video signal The video signal is sent together with the video signal from the interface unit 18 to a subsequent processing device (for example, a VTR).
[0038]
That is, in the video recording / reproducing apparatus having the above configuration, an audio signal is taken together with the video signal, and the audio signal is multiplexed with the video data in accordance with the format of the video data. Thus, the audio data is handled as a part of the video data, and the audio data can be recorded when the video data is recorded. Also, audio data is reproduced at the same time as the reproduction of the video data. After the data is separated, the data is converted back to continuous data, converted into an analog signal, and reproduced and output.
[0039]
Accordingly, the video recording / reproducing apparatus can further handle audio together with video, so that the efficiency of video and audio editing operations can be significantly improved, and the operations can be performed easily.
[0040]
【The invention's effect】
As described above, according to the present invention, in the case of continuously reproducing any video of any material, it is possible to instantly search for each video, and a video that is easy to operate on both the playback side and the recording side It is possible to provide a recording / reproducing apparatus, and further provide a video recording / reproducing apparatus capable of handling audio and video together, thereby facilitating editing work of video and audio.
[Brief description of the drawings]
FIG. 1 is a block circuit diagram showing a configuration of a first embodiment of a video recording / reproducing apparatus using a semiconductor memory according to the present invention.
FIG. 2 is a diagram showing a format of a material table stored in a memory management table storage unit of the embodiment.
FIG. 3 is a diagram showing a state of a cut editing operation of the apparatus of the embodiment.
FIG. 4 is a block circuit diagram showing a configuration of a second embodiment of a video recording / reproducing apparatus using a semiconductor memory according to the present invention.
[Explanation of symbols]
11 RAM for video recording
12: address generator 13: CPU (central processing unit)
14 Program memory 15 Working memory 151 Memory management table storage 152 Chain playback table storage 16 Operation input device 17 Display 18 Video signal input interface 19 Video signal output interface 20 Audio signal Input interface section 21 Time axis compression section 22 Multiplex circuit section 23 Separation circuit section 24 Time axis expansion section 25 Video signal output interface section

Claims (2)

A semiconductor memory for recording video data,
Recording and playback of the video data, processing input including stop, playback material number, playback start field number, operation input device for inputting video designation information including playback end field number,
An address generator for controlling write / read setting of the semiconductor memory and generating a write / read address;
The input video data is recorded in the semiconductor memory by managing the generation address of the address generation unit based on the processing command and the video designation information from the operation input device, and the video data of any material is arbitrarily stored from the semiconductor memory. With a controller to play from the field to any field,
The controller is
A material number of video data recorded in the semiconductor memory, a field number, a map storage unit that stores a memory management map including a start address and an end address for each field,
When receiving a recording command from the operation input device, the address generation unit, by referring to the map, indicating a start address value corresponding to the beginning of the empty area, when receiving a stop command from the operation input device, A recording processing function for instructing to stop address generation,
When receiving a reproduction command from the operation input device, the address generation unit, with reference to the map, the start address value of the reproduction start field number of the material number specified by the video specification information from the operation input device A reproduction processing function for designating an end address value of a reproduction end field number ;
A video designation information recording unit that stores a plurality of video designation information input from the operation input device,
When receiving a playback command from the operation input device, the video designation information is sequentially read from the video designation information recording unit, and a start address value and a playback end field of a playback start field number of a material number designated for each video designation information are read. A chain playback processing function of performing chain playback by sequentially instructing the address generation unit of an end address value of a number,
At the input stage of the semiconductor memory, there is provided audio compression multiplexing means for compressing the time axis of the audio data input together with the video data, multiplexing the input video data, and sending the multiplexed video data to the semiconductor memory,
Video recording characterized in that at a later stage of the output of the semiconductor memory, audio separation / expansion means for separating time-axis-compressed audio data from video data read from the semiconductor memory, expanding the time axis, and restoring the original data is provided. Playback device. The audio compression multiplexing means multiplexes the audio data in a blanking period of the video data,
The audio multiplex decompression means, video recording and reproducing apparatus according to claim 1, characterized in that so as to separate the audio data from the blanking period of the video data read from the semiconductor memory.

Images