JP4218736B2 - Video / audio data reproducing apparatus and video / audio data reproducing method - Google Patents

Description

The present invention relates to an apparatus for reproducing image and audio data from a recording medium on which image and audio signal data generated using high-efficiency encoding means are recorded.

The amount of image data is large. Therefore, when the image signal is digitally recorded on the medium, it is efficient to record the image and sound data compressed by the high-efficiency encoding means on the medium. The compression is performed by removing redundancy or the like. Such a recording medium reproducing apparatus is disclosed in, for example, Japanese Patent Laid-Open No. 6-165125. The outline of the reproducing apparatus disclosed in the publication will be described below.

The playback apparatus is configured to include a decoding means for compressed image and audio compressed data. The recording medium is a disc type.

The data read from the disk is supplied to the decoding means via the buffer means, where it is decrypted. The decoded image and audio signal are output to the outside. The reading of data from the disk is controlled based on the data occupancy rate in the buffer means.
As a result, the code amount per predetermined time is not constant, and can be applied to image data that has been subjected to variable rate encoding that varies in a partial portion.

JP-A-6-165125

However, in the conventional video, information equipment, etc., the data structure, storage method, etc. are different for each apparatus. Therefore, it is difficult to handle the same data between different types of devices. Now that multimedia is being integrated by integrating all media, a system configuration that can provide interoperability across recording media, broadcasting, communication, and the like is strongly desired for user convenience.

High-efficiency encoding is effective not only when information is recorded on the medium but also when an image signal is broadcast or communicated in a digital manner.

An object of the present invention is to provide a recording medium reproducing apparatus having interoperability with broadcasting and communication.

The present invention has been made to achieve the above object. As a first aspect of the present invention, the present invention includes a header having reproduction clock information indicating reproduction timing and bit rate information, and is encoded. In the playback device of the recording medium on which the video / audio data is recorded, data reading means for reading the video / audio data from the recording medium, memory means for temporarily storing the read playback data, and Memory control means for controlling readout of reproduction data from the memory means, and header information for analyzing the header included in the reproduction data read from the memory means and extracting the reproduction clock information and the bit rate information Analysis means and determination of timing for reading the video / audio data from the memory means Reference clock information generating means for generating quasi-reference clock information, clock information comparing means for comparing the recovered clock information extracted by the header information analyzing means and the reference clock information, and reading from the memory means Interface means for sending out the reproduced data to the outside of the reproducing apparatus, and the memory control means is based on the comparison result by the clock information comparison means and the bit rate information extracted by the header information analysis means. Also provided is a video / audio data reproducing apparatus which controls reading of reproduced data from the memory means.

The memory control means starts reading the reproduction data corresponding to the header included in the reproduction clock information from the memory means at the timing indicated by the reproduction clock information, and interrupts the reading according to the bit rate information. It is preferable that

It is preferable that transmission packet generation means for packetizing the reproduction data read from the memory means is provided, and the interface means sends out the reproduction data packetized by the transmission packet generation means.

It is preferable that the transmission packet generation means is configured to separate video data and audio data into separate packets.

The interface means preferably accepts an input of a command input from the outside.

Preferably, at least one of the header information analysis unit, the reference clock information generation unit, and the clock information comparison unit includes a microprocessor.

Preferably, the transmission packet generation means includes a microprocessor.

As a second aspect of the present invention, in a playback apparatus for a recording medium on which encoded video / audio data is recorded, a data reading means for reading video / audio data from the recording medium, and the data playback means Memory means for temporarily storing read data (hereinafter referred to as “reproduction data”), interface means for sending reproduction data to the outside of the reproduction apparatus, and receiving externally input commands and reproduction data request signals There is provided a video / audio data reproducing apparatus comprising memory control means for controlling reproduction data read from the memory means based on a reproduction data request signal received by the interface.

  The memory control means preferably includes a microprocessor.

It is preferable that transmission packet generation means for packetizing the reproduction data is provided, and the interface means transmits the reproduction data packetized by the transmission packet generation means.

Preferably, the transmission packet generation means includes a microprocessor.

According to a third aspect of the present invention, there is provided a playback device for a recording medium on which encoded video / audio data is recorded, a decoding device having means for decoding the encoded video / audio data, audio And / or an output device capable of outputting an image, wherein the playback device includes a memory and stores the encoded video / audio data as the recording medium. Is read out from the memory, temporarily stored in the memory, and then sent to the decoding device at a predetermined timing. The decoder device includes a memory, and is encoded and sequentially sent from the reproducing device. Video / audio data is temporarily stored in the memory and then decoded and output as audio and / or video from the output device. The decoder device further sends an operation command signal to the playback device, and the playback device further operates according to the command signal sent from the decoder device. A video featuring
An audio data playback system is provided.

The first aspect will be described.
The data reading means reads the video / audio data from the recording medium and stores it in the memory means. The interface means sends the reproduction data read from the memory means to the outside. If the transmission packet generating means is provided, the interface means sends the reproduction data packetized by the transmission packet generating means. The transmission packet generation means is
When video data and audio data are made into separate packets, the transmission packet can be matched with a transmission method such as communication.

The header information analysis means analyzes a header included in the reproduction data read from the memory means, and extracts reproduction clock information and bit rate information. On the other hand, the reference clock information generating means generates reference clock information that is a reference for determining the timing of reading video / audio data from the memory means. The clock information comparison unit compares the recovered clock information extracted by the header information analysis unit with the reference clock information. The memory control unit controls reading of the reproduction data from the memory unit based on the comparison result by the clock information comparison unit and the bit rate information extracted by the header information analysis unit. In other words, the memory control means starts reading the reproduction data corresponding to the header including the reproduction clock information from the memory means at the timing indicated by the reproduction clock information. In this case, the reading is interrupted according to the bit rate information. As a result, the time interval of the reproduced clock information is maintained, and the bit rate to be transmitted is substantially matched with the reproduced bit rate information.

The interface unit may accept input of a command input from the outside.

If the circuit including the microprocessor is combined with the header information analysis means, the reference clock information generation means, the clock information comparison means, and the transmission packet generation means, the apparatus cost can be reduced.

The operation of the second aspect of the present invention will be described.
The data reading / reproducing means reads the video / audio data from the recording medium and stores it in the memory means.

The interface means sends the reproduction data read from the memory means to the outside. If the transmission packet generating means is provided, the interface means sends the reproduction data packetized by the transmission packet generating means. The interface means accepts an externally input command and reproduction data request signal.

The memory control means controls reading of the reproduction data from the memory means based on the reproduction data request signal received by the interface.

Note that if a circuit including a microprocessor is also used as a transmission packet generation unit and a memory control unit, the apparatus cost can be reduced.

A third aspect of the present invention will be described.
The playback device reads the encoded video / audio data from the recording medium, temporarily stores it in the memory, and then sends it to the decoding device at a predetermined timing. The decoder device temporarily stores the encoded video / audio data, which are sequentially transmitted from the playback device, in the memory. Then, this is decoded and output from the output device as sound and / or image.

Also, the decoder device sends an operation command signal to the playback device. The playback device operates in accordance with a command signal sent from the decoder device.

As described above, the video / audio data reproducing apparatus according to the present invention can transmit the encoded video / audio data. The decoder / display apparatus can decode the reproduction data of the video / audio data reproduction apparatus without data overflow or underflow, as in the case of decoding the reception data transmitted by the broadcast or communication data decoder.

As described above, according to the present invention, the video / uncoded video from the playback device of the recording medium is recorded.
Audio data can be output, and a system that can achieve interoperability with receivers such as broadcasting and communication can be realized. In addition, the cost of each playback device and system can be reduced.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

First Embodiment A digital video / audio data reproducing apparatus (video disc player) according to a first embodiment will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes an optical disc serving as a recording medium. Similarly, reference numeral 2 denotes a rotation driving unit of the optical disc 1, 3 denotes a pickup, 4 denotes a tracking control unit of the pickup 3, 5 denotes a reproduction signal processing circuit, 6 denotes a memory, 7 denotes a memory control circuit, Indicates a transmission packet generation circuit, 9 indicates a pack header analysis circuit, 10 indicates a comparison circuit, 11 indicates a reference clock generation circuit, and 12 indicates a transmission bus interface.

On the optical disc 1, image data, audio data, and their additional data (for example, directory information such as audio data) are integrated and recorded. These data are
It is recorded in a state where the code amount is compressed by high efficiency coding. A recording track is formed in a spiral shape on the optical disc 1, and the above-described data is recorded according to the recording track.

  The rotation drive unit 2 rotates the optical disc 1 so that the linear velocity is constant, for example.

The pickup 3 reads the data recorded on the optical disc 1 by irradiating the optical disc 1 with laser light and detecting the reflected light. At this time, the tracking control unit 4 causes the pickup 3 to irradiate the track on which desired data is recorded with the laser beam.
Is controlling the position.

The reproduction signal processing circuit 5 is configured to include an error correction circuit, performs error correction on the reproduction data read by the pickup 3, and sends it to the memory 6. Memory 6 of this reproduction data
Is transmitted in response to a data request (request) from the memory control circuit 7. The reproduction signal processing circuit 5 manages the continuity of the reproduction data to be transmitted, and outputs reproduction track information to be traced to the tracking control unit 4 so that desired reproduction data can be transmitted.

The memory 6 is a first-in first-out (FIFO) type memory. The memory 6 outputs the stored reproduction data to the transmission packet generation circuit 8 and the pack header analysis circuit 9 in accordance with an instruction from the memory control circuit 7.

By the way, the reproduction data read from the optical disc 1 and stored in the memory 6 is shown in FIG.
As shown to a), it is comprised from the pack header, the video packet comprised by video data, the audio packet comprised by audio data, and the additional data packet comprised by additional data. The pack header includes header information that integrates reproduction clock information, bit rate information, and the like. Furthermore, one or more packets of each of these data are collected to form a pack. FIG. 2A shows reproduction data in time series. In FIG. 2A, the data located on the left side is the data read first from the disk 1, and is also read from the memory 6 first.

The transmission packet generation circuit 8 converts the reproduction data sent from the memory 6 into a transmission packet, and sends out the transmission packet to the transmission bus via the transmission bus interface 12. FIG. 2B shows the output state of the transmission packet generation circuit 8 together with the reading time. FIG.
(C) is an enlarged view of the time axis of FIG. 2 (b).

The transmission bus (see FIG. 1) has bidirectionality, receives not only playback data but also various commands (for example, playback and stop commands for the optical disc 1) sent from the outside, and Used to send status information back to these commands.

On the other hand, the pack header analysis circuit 9 analyzes clock information (reproduction clock information) and bit rate information included in the pack header in the reproduction data input from the memory 6. Then, the analysis result of the recovered clock information is sent to the comparison circuit 10. Also, the analysis result of the bit rate information is sent to the memory control circuit 7. Note that the pack header analysis circuit 9 regards the maximum bit rate as the bit rate information for the reproduction data encoded by the variable rate.

The comparison circuit 10 compares the above-described recovered clock information with the reference clock information generated by the reference clock generation circuit 11 including the self-running oscillator, and outputs the result to the memory control circuit 7. That is, in the initialization operation performed after power-on (or after returning from the other mode to the normal reproduction mode), the comparison circuit 10 displays the reproduction clock information contained in the pack header read first at that time. The preset value of the reference clock information is used. Thereafter, the preset value of the reference clock information is compared with the regenerated clock information sent sequentially. The comparison circuit 10 outputs the comparison result to the memory control circuit 7.

The memory control circuit 7 controls reading from the memory 6 and the like based on the bit rate information and the comparison result input from the comparison circuit 10. The control is performed so that the average transmission bit rate for each predetermined section (for example, the section from T1 to T2 in FIG. 2B) substantially matches the bit rate information on the output of the transmission packet generation circuit 8. Is. For example, consider a case where the time indicated by the reproduction clock information is T1. At this time, if the time indicated by the reference clock information has not yet reached T1, the memory control unit 7 stops reading the reproduction data from the memory 6. Further, from time T1, reading of reproduction data for one pack to which the pack header including the reproduction information belongs is started. In this case, reading is intermittently performed according to the bit rate information. Thereby, the reproduction data is divided into a size corresponding to one transmission packet and read from the memory 6 (FIG. 2B).
), (C)).

An example of a digital video / audio data reproduction system including the video disc player of this embodiment is shown in FIG.

This system is configured by integrating a video disc player 500, a broadcast receiver 200, a communication receiver 300, a video tape recorder 400, a video camera 600, and a decoder / display device 100.

The decoder / display apparatus 100 includes a pointing device 101, a decryption card 102, a transmission bus interface 103, buffers 104 and 105, a video decoder 106, an audio decoder 107, a pointing device interface 108, I
A C card interface unit 109, a display, a display unit 110 including a speaker, and a transmission bus terminator 601 are included.

The transmission bus starting from the decoder / display device 100 is connected to the video disc player 500 in a daisy chain via the broadcast receiver 200, the communication receiver 300, and the video tape recorder 400. Further, the video disc player 500 is also connected to the video camera 600. Note that the connection order of these devices 100 to 600 is not limited to this figure.

When the broadcast receiver 200, the communication receiver 300, the video tape recorder 400, the video disc player 500, the video camera 600, and the like receive or reproduce the audio and video data, they are encoded and output to the transmission bus.

The transmission bus transmits audio and video data to the decoder / display device 100. Data input through the transmission bus is input to the video decoder 106 and the audio decoder 107 via the transmission bus interface 103 and the buffers 104 and 105.
The video decoder 106 and the audio decoder 107 decode the encoded data and display them on the display unit 110 as image data and audio data.

Data such as audio and video may be scrambled for concealment. The decryption card 102 is used to release this concealment. The decryption card 102 stores information for releasing the scramble. By inserting this into the IC card interface 109, the scramble is released.

A user command instructed by using the pointing device 101 is sent via the pointing device interface 108, the transmission bus interface 103, and the transmission bus.
The data is transmitted to a predetermined device among the broadcast receiver 200 to the video camera 600. Thus, for example, the user can instruct the broadcast receiver 200 to receive a specific channel, or can instruct the video disc player 500 to perform operations such as play and stop. As a result, there is no need to prepare a control device such as a remote controller for each device. In addition, one pointing device 10 can be used without manually switching the audio and video output of each device.
1 can control all devices.

In this system, since it is not necessary to provide the video decoder 106 and the audio decoder 107 in each apparatus, the total cost of the system can be reduced.

In addition, if video and audio data stored on the optical disc 1 is scrambled, it cannot be displayed without the decryption card 102. Thereby, even if the data stored on the optical disc 1 is illegally copied using the video tape recorder 400, the copied data can be made substantially meaningless.

  A second embodiment of the present invention will be described.

Similar to the playback device of the first embodiment (FIG. 1), the playback device of the second embodiment is also assumed to be used by being connected to the transmission bus of the system of FIG.

The configuration of the digital video / audio data reproducing apparatus of the second embodiment is shown in FIG. Blocks having the same functions as those in the first embodiment (FIG. 1) are assigned the same numbers. A portion denoted by reference numeral 13 is an additional data extraction / transmission packet generation circuit. Similarly, reference numeral 14 denotes an audio data extraction / transmission packet generation circuit, 15 denotes a video data extraction / transmission packet generation circuit, 16 denotes a pack header analysis / transmission packet generation circuit, and 17 denotes a remultiplexing circuit.

The pickup 3, the reproduction signal processing circuit 5, etc. read the data recorded on the disk 1 in accordance with instructions from the memory control unit 7. The read data is stored in the memory 6 as reproduction data. Further, the reproduction data is appropriately read in accordance with an instruction from the memory control unit 7, and a pack header analysis / transmission packet generation circuit 16, an additional data extraction / transmission packet generation circuit 13, an audio data extraction / transmission packet generation circuit 14. , And sent to the video data extraction / transmission packet generation circuit 15. The instruction that the memory control unit 7 outputs to the reproduction signal processing circuit 5 and the memory 6 includes the bit rate information input from the pack header analysis / transmission packet generation circuit 16 and the reference clock input from the comparison circuit 10 and the reproduction. This is determined according to the comparison result with the clock.

Each of the circuits 13 to 16 extracts only data having a specific content (type) from the reproduction data, and generates a transmission packet including only the extracted data. For example, the additional data extraction / transmission packet generation circuit 13 extracts only the additional data from the data sent from the memory 6. Further, the additional data transmission packet is generated by appropriately collecting the extracted additional data. Then, the additional data transmission packet is output to the remultiplexing circuit 17 .

Similarly, the audio data extraction / transmission packet generation circuit 14 extracts audio data to generate an audio data transmission packet, and outputs this to the remultiplexing circuit 17 . Also, the video data extraction / transmission packet generation circuit 15 extracts video data to generate a video data transmission packet, and outputs this to the remultiplexing circuit 17 .

The structure of the reproduction data in this embodiment is the same as that in the first embodiment (FIG. 2).
(See (a)).

The remultiplexing circuit 17 remultiplexes the additional data, audio data, video data, and pack header information that are packetized in transmission packets in units of transmission packets. Then, the signal obtained by the remultiplexing is transmitted via the transmission bus interface 12.

On the other hand, the pack header analysis / transmission packet generation circuit 16 extracts clock information and bit rate information from the pack header in the same manner as the pack header analysis circuit 9 (see FIG. 1) shown in the first embodiment. The clock information is sent directly to the comparison circuit 10 and the bit rate information is sent directly to the memory control circuit 7.

In the present embodiment, since the transmission packet is generated separately for each type of data (audio data, video data, pack header), the configuration of the transmission packet to be generated is changed to the transmission format of broadcasting or communication. It can be changed to suit. For example, the transmission packet length can be determined, or a transmission packet header can be added to each transmission packet. Therefore, a bit stream having the same format as the broadcast or communication reception data (eg, Tr in MPEG)
output Stream) can be output. As a result, the decoder / display device 100 obtains the data input through the transmission bus from the origin of the data (for example, data obtained by reproducing a recording medium or by receiving a broadcast or the like). The video data and audio data can be decoded by the same method and means (decoders 106 and 107). Therefore, it helps to simplify the decoder / display device 100.

  A third embodiment of the present invention will be described.

The reproducing apparatus of the third embodiment is characterized in that the data reading operation from the disk is controlled in accordance with an instruction (request) from the outside.

The configuration of the digital video / audio data reproducing apparatus of this embodiment is shown in FIG. Reference numeral 18 denotes a reproduction data request detection circuit. Blocks having the same functions as those in the first embodiment (FIG. 1) are assigned the same numbers.

Reading of data from the disk 1 is performed by the pickup 3, the reproduction signal processing circuit 5 and the like in accordance with an instruction from the memory control circuit 7 ′. And the read data is
Stored in the memory 6. However, the memory control circuit 7 ′ of this embodiment operates according to a request input from the outside.

The reproduction data read from the memory 6 in accordance with the instruction from the memory control circuit 7 ′ is the first
As in the first embodiment, the data is sent to the external transmission bus via the transmission packet generation circuit 8 and the transmission bus interface 12.

On the other hand, a request signal for reproduction data is sent from the transmission bus in addition to a general command.

The data request detection circuit 18 detects the request signal and transmits it to the memory control circuit 7. The memory control circuit 7 reads the reproduction data from the memory 6 only when the request signal is in a transmission request state.

When the playback device of the present embodiment is connected to the transmission bus of the decoder / display device 100 (see FIG. 2), a part of the decoder / display device 100 (video decoder 102, audio decoder 104, etc.) is used. ) Need to be changed. In other words, broadcast receiver 2
It is necessary to change a part of the decoding procedure between decoding 00 and the data received by the communication receiver 300 and decoding decoding data such as a video disc player.

A decoder / display apparatus 100 'corresponding to the third embodiment is shown in FIG. Compared to the decoder / display apparatus 100 (see FIG. 3), the decoder / display apparatus 100 ′ is provided with a buffer occupancy rate check circuit 111.
The buffer occupancy rate check circuit 111 monitors the availability of the buffers 104 and 105. When there is room to write new data in the buffers 104 and 105, the above-described request signal is transmitted via the transmission bus interface 103.

The reproducing apparatus of the third embodiment includes a pack header analysis circuit 9 and a clock information comparison circuit 12.
Etc. are unnecessary, and cost reduction is possible.

  A fourth embodiment of the present invention will be described.

In the fourth embodiment, transmission packet generation, pack header analysis, and the like are performed using a microprocessor. That is, in this embodiment, the microprocessor 2 described later.
0 performs the functions of the memory control circuit 7, the transmission packet generation circuit 8, the pack header analysis circuit 9, and the comparator 10 in the first embodiment.

The configuration of the playback apparatus of the present embodiment is as shown in FIG. The part denoted by reference numeral 19 is second.
Memory. Similarly, reference numeral 20 denotes a microprocessor, and 21 denotes a system interface. The blocks having the same functions as those in the first embodiment (FIG. 1) are given the same numbers. In the following description, for the sake of convenience, the memory 6 is referred to as “first memory 6”.

The microprocessor 20 obtains a reference clock from the reference clock generation circuit 11 in addition to its own operation clock (for example, 27 MHz). Therefore, the microprocessor 20
Reference clock information is held internally. The microprocessor 20 uses the reference clock information and the like to basically perform read data read control from the memory 6 by the same method as in the first embodiment.

The microprocessor 20 outputs the address designation to the first memory 6 through the address bus. The first memory 6 reads the data stored at the address and outputs it to the data bus. The microprocessor 20 converts the data output to the data bus into
Store in the second memory 19. In this case, the microprocessor 20 discriminates video data, audio data, additional data, and a pack header included in the data, and makes it easy to distinguish them on the second memory 19. . For example, these are divided for each type of data (video data, audio data, pack header) and stored in different storage areas.

Further, when the data read from the first memory 6 is a pack header, the microprocessor 20 analyzes the reproduction clock information and the bit rate information included in the pack header, and the data is obtained from the obtained address. Is read.

When the microprocessor 20 reads out each data stored in the second memory 19, the microprocessor 20 converts these data into transmission packets. The microprocessor 20 sends the transmission packet to the transmission bus via the transmission bus interface 12.

The system controller interface 21 includes a transmission bus and a transmission bus interface 12.
Is sent to the system controller (not shown) of the playback apparatus. Conversely, status information sent from the system controller is sent to the transmission bus via the transmission bus interface 12.

In this embodiment, the microprocessor 20 performs read control of the first memory 6 and transmission packetization of all data. Therefore, the cost can be significantly reduced as compared with the first embodiment (see FIG. 1).

  A fifth embodiment of the present invention will be described.

  The configuration of the digital video / audio data reproducing apparatus of this embodiment is shown in FIG.

Blocks having the same functions as those in the first embodiment (FIG. 1) and the fourth embodiment (FIG. 7) are assigned the same numbers.

The fifth embodiment is different from the fourth embodiment in that the rotation drive unit 2, the tracking control unit 4, and the reproduction signal processing circuit 5 are connected to the address bus and data bus of the microprocessor 20. Different. Another difference is that the second memory 19 is not provided. Here, the first memory 6 is simply referred to as “memory 6”.

In this embodiment, the microprocessor 20 stores the reproduction data from the reproduction signal processing circuit 5 directly in the memory 6. In this case, the reproduction data can be restored as it is in the time order.

Thereafter, the microprocessor 20 reads the reproduction data from the memory 6. The reproduction data is packetized at the time of reading. If the read data is a pack header, the microprocessor 20 compares the reference clock information with the recovered clock information included in the pack header. Then, reading from the memory 6 is controlled based on the comparison result and the bit rate information.

The microprocessor 20 also monitors the data occupation rate in the memory 6. And
If there is room to write data in the memory 6, the microprocessor 20 instructs to read new data. That is, the tracking control unit 4 is instructed to indicate information (reproduction track information) indicating a track in which data to be read by the pickup 3 is written, and new data is written from the reproduction signal processing circuit 5 to the memory 6.

The microprocessor 20 is also connected to the rotation drive unit 2. Therefore, the microprocessor 20 also serves as a system controller that controls each unit based on commands such as start and stop input via the transmission bus interface 12.

In the present embodiment, a memory corresponding to the memory 19 in the fourth embodiment is not necessary. Further, since read data read control, transmission packetization, and system control are performed by a single microprocessor, the cost can be further reduced as compared with the fourth embodiment (FIG. 7).

In the fourth and fifth embodiments, similarly to the first embodiment, the reproduction data read from the memory 6 (or the memory 19) is controlled by the comparison result between the reproduction clock information and the reference clock information and the bit rate information. However, as in the third embodiment (FIG. 5), the reproduction data read out may be controlled in accordance with an externally input request, which is the same as the reproduction data input from the transmission bus. The request can be easily realized by causing the microprocessor 20 to detect the request.

Further, the first to fifth embodiments described above are video disk players using a disk as a recording medium. However, the scope of application of the present invention is not limited to this. The present invention can also be applied to a video tape reproducing apparatus using a tape medium.

1 is a block diagram showing a configuration of a video / audio data reproducing apparatus according to a first embodiment of the present invention; FIG. It is a figure which shows an example of the reproduction | regeneration data transmission method of the reproducing | regenerating apparatus of the video / audio data of this invention. It is a block diagram which shows the example of the reproduction | regeneration system of video / audio data of this invention. It is a block diagram which shows the structure of the reproducing apparatus of the video / audio data which is the 2nd Example of this invention. It is a block diagram which shows the structure of the reproducing apparatus of the video / audio data which is the 3rd Example of this invention. It is a block diagram which shows the example of the decoder display apparatus in the reproduction | regeneration system of video / audio data of this invention. It is a block diagram which shows the structure of the reproducing apparatus of the video / audio data which is the 4th Example of this invention. It is a block diagram which shows the structure of the reproducing apparatus of the video / audio data which is the 5th Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Disk, 5 ... Reproduction signal processing circuit, 6 ... Memory, 7 ... Memory control circuit, 8 ... Transmission packet generation circuit, 9 ... Pack header analysis circuit, 10 ... Comparison circuit, 11 ... Reference clock generation circuit, 12 ... Transmission Bus interface circuit 13 Additional data extraction / transmission packet generation circuit 14 Audio data extraction / transmission packet generation circuit 15 Video data extraction / transmission packet generation circuit 16 Pack pack analysis / transmission packet generation circuit 18 Request detection circuit, 19 ... memory, 20 ... microprocessor, 100 ... decoder / display device, 500 ... video disc player

Claims (6)

A playback device for a recording medium on which video data and audio data are multiplexed and recorded,
Data reading means for reading multiplexed video data and audio data from the recording medium;
By separating the multiplexed video data and audio data read by the data reading means, generating a video data transmission packet and an audio data transmission packet from the separated video data and audio data, and remultiplexing, Transmission packet generation means for generating a bit stream;
Output means for outputting the bitstream generated by the transmission packet generation means,
The transmission packet generation means converts the packet structure of video / audio data read from the recording medium into a bit stream having a packet structure suitable for an external transmission destination transmitted by the output means,
The bit stream is obtained by multiplexing a video data transmission packet composed of the video data and an audio data transmission packet composed of the audio data, and the video data transmission packet and the audio data transmission packet. Is a transmission packet of a predetermined packet length that is generated separately for each data type, whether it is video data or audio data, and a transmission packet header is added to each transmission packet. A video / audio data reproducing apparatus having a packet configuration suitable for an external destination sent by the output means. 2. The video / audio data reproducing apparatus according to claim 1 , wherein the video data and the audio data recorded on the recording medium form a pack by a video packet, an audio packet, and a pack header. . A method of reproducing a recording medium in which video data and audio data are multiplexed and recorded,
In order to convert the packet configuration of multiplexed video data and audio data read from the recording medium into a packet configuration suitable for the transmission destination,
Read multiplexed video data and audio data from the recording medium,
After the read multiplexed video data and audio data are separated, the video data transmission packet constituted by the video data and the audio data transmission packet constituted by the audio data are multiplexed. The video data transmission packet and the audio data transmission packet are separately extracted for each type of data such as video data or audio data, and a transmission packet header is added to each transmission packet. Generate a bitstream that is a transmission packet,
A method for reproducing video / audio data, wherein the bit stream is output. 4. The video / audio data reproducing method according to claim 3 , wherein the video data and audio data recorded on the recording medium form a pack by a video packet, an audio packet and a pack header. . The bit stream is video and audio data reproducing apparatus according to claim 1 or 2 characterized in that it is a Transport Stream. The bitstream, the method of reproducing video and audio data according to claim 3 or 4, characterized in that it is a Transport Stream.

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