JP2002015508A - Signal processor and transmission method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely perform copyright protection of audio and video contents data. SOLUTION: A disk player 100 which is a transmitter is connected to a recorder 300, being a receiver via two IEEE1394 standard serial interfaces 188-1 and 188-2, etc., for instance, a prescribed data stream including at least either audio data pack or video data pack is formed, at least a down-sampling flag and a down-mixing flag or a dequantizing flag are contained in a prescribed area in the data stream and transmitted to the recorder 300 via the IEEE1394 standard serial interfaces, so that recorder side checks the states of the flags to permit or prevent a secondary copy, and more meticulous copyright protection can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a packet signal processing device and a transmission method for transmitting a multiplexed data stream such as DVD audio via a serial interface.

[0002]

2. Description of the Related Art Conventionally, there has been known a technique for transmitting a data stream including video and audio such as MPEG via a serial interface. For example, one disclosed in JP-A-10-190705 is known. By the way, in recent years, it has been required to transmit high-quality, large-volume content data by high-sampling, high-bit, and multi-channel between devices at high speed. In the case of transferring such high-quality data, in particular, copyright management has become an important issue for copyright protection of content data (in particular, copied data is copied again). Copyright protection, such as whether or not to permit secondary copying, is an issue.)
In general, when copying is permitted, high-quality data is copied by converting the data to a sampling frequency (for example, 44.1 kHz or 48 kHz), a bit number (for example, 16), and 2-channel stereo comparable to a CD (compact disc). Granting is also an issue.
Another problem is to accurately indicate the number of sample bits to be transmitted and reproduce the data without error. In view of the above problems, the present invention provides a packet signal processing device and a data transmission method for transmitting an audio signal or the like that solves these problems via a digital serial interface. is there.

[0003]

The present invention comprises the following means 1) to 4) in order to achieve the above object. That is,

[0004] 1) A predetermined pack is formed from a data stream including at least one of audio data and video data, and at least a downsampling flag, a downmix flag, or a dequantize flag is provided in a predetermined area in the pack. A signal processing device comprising packetization processing means for storing a secondary copy permission or prohibition flag and packetizing the packet in a format of a predetermined protocol. 2) A predetermined pack is formed from a data stream including at least one of audio data and video data, and at least a downsampling flag, a downmix flag, or a dequantize flag and a secondary A transmission method comprising storing a copy permission or prohibition flag, converting the packet into a packet corresponding to a serial interface of a predetermined standard, and transmitting the packet through the serial interface of the predetermined standard. 3) A predetermined pack is formed from a data stream including at least one of audio data and video data, and a copy that is at least a downsampling flag, a downmix flag, or a dequantize flag is written in a predetermined area in the data stream. Decoding means for receiving and decoding data including the flag packetized in a format of a predetermined protocol by storing supplementary information, and control means for judging permission or prohibition of secondary copy by referring to the copy supplementary information; A signal processing device comprising: storage means for storing determination result information obtained by the control means; and recording means for recording data of the decoding means. 4) A predetermined data stream including audio data is formed, and in a predetermined area in the data stream,
At least a down sampling flag, a down mix flag, or a copy additional information that is a dequantize flag and a bit number flag of the sample data for each sample data are stored, converted to a serial interface of a predetermined standard, and passed through the serial interface of the predetermined standard A transmission method characterized by transmitting.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described below with reference to preferred embodiments. FIG. 1 is a block diagram showing a first embodiment of a signal processing device and a transmission method according to the embodiment, and FIG. 2 is a flowchart showing processing of the disc player of FIG.

In the example of FIG. 1, a disc player 100 as a transmitting device and a recording / reproducing device 300 as a receiving device are provided with a data transfer interface (I / F) 200a,
200b, and data transfer I / Fs 200a, 200b
Are connected via two IEEE 1394 standard serial interfaces 188-1 and 188-2. The disc player 100 reads, for example, the audio signal A and the still picture (still picture) signal SPCT recorded on the DVD audio disc, and transfers them to the data transfer I / F 200a and the serial interface 188-.
1, 188-2 to the recording device 300.

[0007] The recording device 300 outputs the audio signal A
And the still image signal SPCT to the serial interface 188
-1, 188-2, received via the data transfer I / F 200b, and recorded on, for example, a DVD-RW disc (recordable disc). At this time, one serial interface 188-1 is selectively used for reception or transmission, and the other serial interface 188-2 is used exclusively for transmission.

Referring to FIG. 2, disc player 1 shown in FIG.
00 will be described. First, the data transfer I / F 200
a and one of the serial interfaces 188-1 are set to the reception mode (step S1).
/ F200a, two serial interfaces 188-
1 and 188-2 to perform bidirectional transmission with the recording apparatus 300 (step S2). Next, one of the serial interfaces 188-1 is set from the reception mode to the transmission mode (step S3), and the signal having a relatively high transfer rate is dispersed via the two serial interfaces 188-1 and 188-2. The data is transmitted to the playback device 300 (step S4). That is, in this example, the other serial interface 188-2 is always set to the transmission mode.

As a specific example of the transmission data, a real-time information signal RTI (for example, text data) and a still picture signal SPCT are recorded in addition to the audio signal A on the DVD audio disk. -1 and the real-time information signal RT
I and the still picture signal SPCT through the serial interface 18
A method of transmitting data via 8-2 is conceivable. By dispersing in this manner, the former audio signal A, the latter real-time information signal RTI, and the still picture signal SPCT can be transmitted at high speed. Note that specific examples of communication performed in step S1 in which one is set to the reception mode are a designation (request) of a disc from a reproduction terminal and an operation instruction such as a play command.

Although two serial interfaces have been described, the present invention is not limited to this. For example, as shown in FIGS. 3 and 4, four serial interfaces 188-1 to 188-18
8-4 (and the data transfer interface I / F 200a)
', 200b'). That is, first, one of the serial interfaces 188-1 to 188-4
The book is set to the reception mode (step S11),
Two serial interfaces 188-1, 188-2
Bidirectional transmission with the recording device 300 via the PC (step S12). Next, the interface 188-1 in the reception mode is set to the bidirectional mode (step S1).
3), then three serial interfaces 188-2
188-4, the signal having a relatively high transfer rate is dispersed and transmitted to the recording device 300 (step S1).
4).

That is, in this case, for example, two serial interfaces 188-1 to 188-2 are selectively used for reception or transmission, and the other two serial interfaces 188-3 to 188-4 are dedicated to transmission. May be used. In this case, for example, the audio signal A, the real-time information signal RTI, and the still image signal SPCT are transmitted via three serial interfaces 188-2 to 188-4, respectively, and one of them is transmitted.
Authentication of copy management and data on the number of copies after the end of accounting are mutually transmitted for confirmation via the serial interface 188-2, and data relating to operation with the receiving terminal is transmitted to one serial interface. A method of mutual transmission via the interface 188-1 is conceivable.

In this embodiment, the present invention can be applied to an audio-compatible format of the IEC958 standard instead of the transmission system of the IEEE1394 standard. IEC958
The standard differs from the bidirectional transmission system like the IEEE 1394 standard of the present embodiment in that it is a transmission system in only one direction. In the case of bidirectional transmission using a plurality of serial interfaces as in the present embodiment, Is easy to apply. Further, the audio-compatible format of the IEC958 standard is the IEC9 standard in the IEEE1394 standard.
It may be a 58 mode audio compatible format, and can be applied to various modes of the IEEE 1394 standard. The flag is recorded in a user code by setting the IEC958 standard to a specific use mode and in an identifiable state.

Next, a copy flag, copy supplementary information (downsampling flag Fa, downmix flag Fb, dequantize flag Fc), charging flag, zero flag, mute flag, and pack flag will be described with reference to FIG. First, the transmission side sends a copy flag to the reception side. When copying is possible, if the receiving device is a valid device, the receiving device has the user ID.
Request D. As a result, if it is determined that the device is legitimate,
Next, authentication data is transmitted, and after waiting for a response, it is checked whether or not the receiving side is eligible to copy, and if the check conditions are satisfied, the process is started. The transmitting side receives the copy supplementary information indicating the processing applied to the content in advance, that is, converts it to, for example, a サ ン プ リ ン グ sampling frequency. If the down-sampling process has been performed, the downmix flag Fb is set to 1, and if the original bit (for example, 20 bits) has been dequantized from 16 bits, the demix flag Fc has been set.
Is set to 1 to receive the copy supplementary information.

The receiving side looks at the copy supplementary information (step S21) and determines whether the secondary copy is prohibited (step S2).
2) If the recording mode is set (step S2
5 or Y in step S23), "Secondary copy permitted" or "Secondary copy prohibited" is recorded in the management area of the recording area shown in FIG. 15, for example, in the storage memory provided in the apparatus (step S23). S24, 26). When the playback mode is set (N in step S25, or step S23
N) does not perform this recording. That is, if any one of the copy supplementary information (the downsampling flag Fa, the downmix flag Fb, and the dequantize flag Fc) is set and the copy is permitted, “secondary copy prohibited” is set (step S24). If the copy is permitted without setting any of the supplementary information on the copy (the downsampling flag Fa, the downmix flag Fb, and the dequantize flag Fc), "secondary copy is permitted" (step S26).

Next, the ID and each flag are checked (step S27), and a charging process is performed from the charging flag. Next, when some of the serial interfaces are not used or the data is “0”, a zero flag is transmitted from the transmitting side to the receiving side via the serial interface. The receiving side looks at this flag (step S27), and if Y, does not perform the receiving process (step S29), and transmits data other than the audio signal A, for example, the still image signal SPCT and the real-time information RTI to a serial interface. When transmitting via D / D on the receiving side,
The transmitting side transmits a mute flag to the receiving side via the serial interface so that noise is not generated by the A-converter, and the receiving side looks at this flag (step S30), and if Y, performs mute processing. (Step S31).

The audio signal A, the still picture signal SPCT,
Real-time information RTI, video signal V
When transmitting over a certain serial interface, a signal type flag is transmitted from the transmitting side to the receiving side via the serial interface so that the receiving side can immediately decode the signal and synchronize. The receiving side sees this flag and receives it. If it is in the recording mode, it records, and if it is in the reproducing mode, it reproduces it (step S32).
If completed (Y in step S33), the process ends. When the reception is in the recording mode and a “secondary copy prohibited” or “secondary copy permitted” flag is recorded on the recording medium, the copyright is protected by this flag.

FIG. 6 shows a specific example in the case where the reception step 32 is the reproduction mode. That is, when the data identification flag indicates that the audio signal (A
(Data of the pack) (step S41), and
If it is, supply it to the A pack buffer (step S4).
2) It is checked whether the data identification flag is a video signal (data of a video pack of a DVD audio disk) (step S43). If Y, the data is supplied to a V pack buffer (step S44). (Data of RTI pack of DVD audio disc)
(Step S45), and if Y, the data is supplied to the RTI pack buffer (Step S46), and the pack flag is set to the SPCT signal (SPC of DVD audio disc).
T-pack data) (step S47),
If it is Y, it is supplied to the SPCT pack buffer (step S48), otherwise, it is supplied to the decoder buffer (step S49). The copy flag need not always be sent as in the case of the reproduction mode.

The above-mentioned charging flag, zero flag, mute flag, and / or signal type identification flag (also referred to as data identification flag) are stored in the following data array and transmitted.

FIG. 7 shows IEEE1 for performing the transmission.
FIG. 7A is a diagram for explaining the isochronous (Isochronous) transfer method of the 394 standard, and FIG.
Indicates a stream. The transport stream is 1
It is a fixed packet of 88 bytes. Here, a bit string of audio data according to the DVD audio standard (A pack)
And image data and audio data according to the DVD video standard (V pack) are arranged.

FIGS. 11 to 14 show the data structures of the A pack, V pack, RTI pack and SPCT pack arranged here. The PCM A pack shown in FIG.
This is recorded in the data area of the VD audio disc. The PCM A-pack is composed of 2048 bytes or less, and is composed of a 14-byte pack header and an A packet. The A packet includes a packet header of 17, 9, or 14 bytes, a private header, and audio data of 1 to 2011 bytes.

The private header includes: an 8-bit substream ID; a 3-bit reserved area in UPC, EAN, and ISRC; and a 5-bit UPC / E in UPC, EAN, and ISRC.
An 8-bit UPC / E in UPC, EAN, and ISRC
AN / ISRC data; 8 bits of private header length; 16 bits of first access unit pointer; 8 bytes of audio data information (ADI); and 0 to 7 bytes of stuffing bytes. Have been.

The ADI (audio data information section) includes: 1-bit audio emphasis flag; 1-bit reserved area; 1-bit stereo playback mode; 1-bit downmix code validity; A 4-bit downmix code; and a 4-bit quantization word length "1" of group "1".
And the quantization word length “2” of the 4-bit group “2”
A 4-bit audio sampling frequency fs1 of group "1"; a 4-bit audio sampling frequency fs2 of group "2"; a 4-bit reserved area; and a 4-bit multi-channel type. A 3-bit group "2" bit shift; 5-bit channel assignment information; 8-bit dynamic range control information; and a 16-bit reserved area.

The V pack shown in FIG. 12 is recorded in the data area of a DVD video disk.
This V-pack is composed of 2048 bytes or less, and is composed of a 14-byte pack header and a user data packet. The pack header consists of a 4-byte pack start, a 6-byte SCR, and a 3-byte MU.
It is composed of an X rate (multiple transfer rate) and 1-byte stuffing.

The RTI pack shown in FIG. 13 is recorded in the data area of a DVD audio disc. This RTI pack is made up of 2048 bytes or less, which includes a 14-byte pack header and an RTI pack.
It is composed of packets. RTI packet is 1
It consists of a packet header of 7, 9, or 14 bytes, an RTI private header, and RTI data of 1 to 2015 bytes.

The RTI private header includes: an 8-bit substream ID, a 2-byte reserved area, an 8-bit private header length, a 4-bit reserved area, and a 4-bit RTI information ID. , And a stuffing byte of 0 to 7 bytes.

The SPCT pack shown in FIG. 14 is recorded in the data area of a DVD audio disc. This SPCT pack is composed of 2048 bytes or less, which is composed of a 14-byte pack header and S bytes.
It is composed of PCT packets. The SPCT packet includes a packet header of 22, 19, or 9 bytes and SPCT data of 1 to 2025 bytes.

Referring again to FIG. 7, the above-mentioned fixed packet of 188 bytes is prefixed with a time stamp called a source packet header [FIG.
(B)]. On the receiving side, audio and moving images are reproduced according to the time of the time stamp. Then, these data are divided into a plurality of data blocks each of 48 bytes [FIG. 7 (c)]. There are four division methods: 192 bytes × 1 block, 96 bytes × 2 blocks, 48 bytes × 4 blocks, and 24 bytes × 8 blocks.

Next, a plurality of data blocks are put together to form one isochronous transfer packet.
This grouping is performed in such a way that 125 μs is defined as one cycle, and the number of copies is sequentially reduced to the number that can be accommodated in each cycle, and a packet header for IEEE1394 described later is added to the head of the block. FIG. 7D shows a state in which data divided into 48-byte units are combined into three blocks and two blocks.

When performing this data transfer, as shown in FIG. 8, arbitration is added to the head, a cycle start packet is arranged following this, and a predetermined interval is added following the cycle start packet. Each time, the packets 500 of 125 μs are repeatedly arranged and transferred.

The packet 500 every 125 μs is
It comprises a packet header, a data field, and a 32-bit data error detection code. The packet header includes: 16-bit data length information; 2-bit CIP (Common Isochronous Pac described later)
ket) a tag indicating presence / absence of a header, channel assignment information for transmitting a 6-bit packet, a transaction code indicating a 4-bit processing code, a 4-bit synchronization code, and a 32-bit packet header. And an error detection code.

The data field is a 32-bit CIP
It is composed of a header, a header 400 of 64-bit real data, and other real data. The real data header 400 includes a 32-bit content ID, an 8-bit ID, 16-bit application information, and 8-bit copy supplementary information. 32-bit content I
D is constituted by ISRC or a symbol assigned to the content. ISRC (International Standard Recording Code)
Is copyright information for specifying internationally managed content. The 8-bit ID is composed of: a total number of 4-bit serial interfaces; and a 4-bit serial interface number. The 16-bit application information includes: a 4-bit data identification flag, a 1-bit zero flag, a 1-bit mute flag, a 6-bit accounting flag, a 2-bit copy flag, and a 2-bit. And a holding area of. The copy flag is set to “0” when copying is possible, and is set to “1” when copying is not possible.

The 8-bit copy supplementary information includes: 1-bit downsampling flag Fa, 1-bit downmix flag Fb, 1-bit dequantize flag Fc, and 5-bit reserved area. Be composed.

FIG. 9 shows a specific embodiment of the disc player 100, in which a DVD audio disc and a DV
1 shows a universal player capable of reproducing a D video disc or the like. In the universal player, the control unit 14
DVD audio disk, DVD video disk, D
Data recorded on a disk 1 such as a VD-RW disk is reproduced by a drive device 2 and demodulated by a demodulation circuit 2B.
Is demodulated. DVD audio disc, DVD
A video (V) pack reproduced from a video / video disk or a DVD-RW disk and a still image pack reproduced from a DVD audio disk or a DVD-RW disk are DVD-decoded by a still image / V-pack decoder 3 and decoded into a video stream. Is converted to Note that this video stream is originally scrambled by the CSS (content scramble system) method.

When the video stream is to be displayed on an external display (not shown) via the monitor output terminal 55 shown in FIG. 1, the video stream is expanded and descrambled by the expansion / image converter 4. Then, the V pack is output as a video signal / sub-picture signal via the D / A converter 5, and the still picture SPCT pack is output as a video signal. On the other hand, there are two cases of transferring to the recording device 300 shown in FIG.
The data decompressed and descrambled by the image conversion unit 4 is re-formatted into a pack by the pack generation 6, and then the data is transferred via two data transfer I / Fs 7-1 and 7-2 and a serial interface of IEEE 1394 or IEC958. The data is transferred to the recording device 300. In the second method, the scramble-free video stream decoded by the still image / V-pack decoder 3 is transferred to the data transfer I / Fs 7-1 and 7-2 and the IEEE 1394 or I / F.
The data is transferred to the recording device 300 via the EC958 serial interface.

Also, a DVD audio disk, DVD
An audio A pack played from a RW disc,
The RTI pack is DVD-decoded by the A-pack / RTI-pack decoder 8 and converted into a DVD audio stream, and further converted into character information / real-time text information RTI via the display signal generation unit 11. This DVD audio stream is originally a CPTM
Although it is scrambled by the C2 method based on (copy protection method), it is not scrambled.

When an audio signal is taken out through the output terminal 55 of FIG. 1 and supplied to an external speaker (not shown), this audio stream is converted by the PCM conversion / audio signal processing section 9 into PCM conversion and descrambling. Is converted to a PCM signal, and then D / A
It is output via the converter 17. When the RTI is displayed on an external display (not shown), the output signal converted by the display signal generator 18 is supplied. On the other hand,
There are two types of transfer to the recording device 300 shown in FIG. 1, as in the case of video. In the first method, PCM data subjected to PCM conversion and descrambling by the PCM conversion / audio signal processing unit 9 is down-converted. Sampling unit 1
At 0, the sampling frequency is reduced to ２, and at the downmix section 11, the multi-channel signal is downmixed to a 2-channel stereo signal, and the 958 mode generation section 12 outputs the 958 mode as shown in FIGS. 18 (AM824 standard), and then two data transfer I / Fs 13-1 and 13-2
The data is transferred to the recording apparatus 300 via a serial interface of IEEE 1394 or IEC 958.

In the second method, audio data is not decoded by the A-pack / RTI-pack decoder 8 and the audio data is transferred in the data transfer I / F 1 in a packet state without scrambling.
3-1 and 13-2 and IEEE1394 or IEC95
8 is transferred to the recording device 300 via the serial interface. In the data transfer I / F, the header described with reference to FIG. 8 is stored in real data. In the embodiment shown in FIG. 18, the number of bits of each channel data such as Lf, Rf, Ls, Rs, C arranged in a predetermined order is designated by a code for each channel.

FIG. 10 shows another example of the receiving apparatus 300, which shows a reproducing apparatus for reproducing the data transferred by the universal player 100 shown in FIG. 9, wherein the data transferred by the universal player 100 via the serial interface. Are the data transfer I / Fs 21-1 and 21
-2. Data transfer I / F 21-1,
21-2, the DVD is controlled by the control unit 32 based on the flag of the header transferred by the universal player 100.
The buffer 22V of the decoder 22, the buffer 23V of the A-pack reproducing unit 23, and the buffer 24 of the V-pack reproducing unit 24
V, buffer 25V of the RTI pack reproducing unit 25, and S
The data is distributed to one of the buffers 26V of the PCT pack reproducing unit 26. That is, when the A-pack is identified by the 4-bit data identification flag of the 16-bit application information of the real data shown in FIG. 7, the buffer 23V of the A-pack reproducing unit 23 identifies the V-pack. Is stored in the buffer 24V of the V pack playback unit 24 as an RTI pack, the buffer 25V of the RTI pack playback unit 25 is read as an SPCT pack,
The data is distributed to the buffers 26V of the CT pack reproducing unit 26, respectively. If the 4-bit pack ID of the 16-bit application information of the real data header is not added (unused), it is supplied to the buffer 22V of the DVD decoder 22.

If any one of the transmitted supplementary information (downsampling flag Fa, downmix flag Fb, dequantize flag Fc) is set and the copy is permitted in the control section 32, "Secondary copy prohibition is performed." Is stored in the storage memory 40, and if the copy is permitted without setting any of the supplementary information (downsampling flag Fa, downmix flag Fb, dequantize flag Fc), "secondary copy permitted"
Is stored in the storage memory 40, and when there is a request for a secondary copy, control corresponding to this information is performed. In this case, a flag for permitting / prohibiting the secondary copy is stored and transmitted in the 2-bit reserved area in the 16-bit application information, and this flag is recorded in the storage memory 40. The same control as described above may be performed.

The operation section 33 is for performing operations such as play. Also, header 4 of real data
The content is identified by the content ID of 00, and the charging management unit 34 performs a charging process with reference to an internal charging table. In this way, the charging fee for each content can be set.

By providing a pack ID in the real data header 400, the audio signal A and the still image signal S
When receiving the PCT, the real-time information RTI, and the video signal V, the receiving side can immediately decode it.
Therefore, it is not necessary to take in a large amount of still image signals into the still image buffer in advance in order to achieve synchronization, and the limitation on synchronous reproduction of still images, which has been conventionally limited by the buffer capacity, is reduced. In addition, the video moving image V (with audio) and the audio A can be taken out at the same time and can be reproduced at the same time. Further, the total number of used serial interfaces is detected by the 8-bit ID, and the number used by the serial interface number is continuously received. Further, a zero flag, a mute flag, and a billing flag are referred to. The accounting flag is processed by the accounting management unit 34. The copy flag is not used in this case.

Each flag such as the downsample flag in the above-described embodiment is not only stored in the header in the real data shown in FIG. May be stored in a management pack or the like (not shown) that manages the data.
It may be stored in an EEE1394 header or the like. Furthermore, the interface in the above-described embodiment is an interface that can be connected to a plurality of interfaces, and has been described with a configuration in which a plurality of interfaces are connected in consideration of transferring a large amount of data at higher speed. If it is not desired to transfer data at high speed, one interface of the IEEE 1394 standard capable of bidirectional transfer may be used. The disk player is not limited to an optical disk, but may be a recording medium such as a hard disk (HDD).

[0043]

As described above, according to the present invention,
In particular, at least a downsampling flag, a downmix flag,
Alternatively, a dequantize flag and a secondary copy permission or prohibition flag are stored, or the downsampling flag, downmix flag, or dequantize flag is stored, and the secondary copy permission or prohibition flag is set on the receiving side. Since it is generated, the copyright protection on the receiving side becomes easier. In addition, since a flag for identifying the number of bits of the sample data is stored for each sample data,
Reproduction is possible without error for each sample.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a transmission method and a signal processing device (transmitting device, receiving device) according to the present invention.

FIG. 2 is a flowchart showing a process of the disc player of FIG. 1;

FIG. 3 is a block diagram illustrating a transmission method and a signal processing device (a transmission device and a reception device) according to a second embodiment;

FIG. 4 is a flowchart showing processing of the disc player of FIG. 3;

FIG. 5 is a flowchart showing a process of the receiving device of FIGS. 1 and 3;

FIG. 6 is a diagram showing details of a part of the flowchart in FIG. 5;

FIG. 7 is a diagram for explaining an isochronous transfer system in the IEEE 1394 standard.

FIG. 8 is a detailed diagram of a data array at the time of transfer.

FIG. 9 is a block diagram showing another example of the player shown in FIGS. 1 and 3;

FIG. 10 is a block diagram illustrating another example of the receiving unit in FIGS. 1 and 3;

FIG. 11 shows a data structure of an A-pack of linear PCM of audio data according to the DVD audio standard.

FIG. 12 shows a data structure of data according to the DVD video standard.

FIG. 13 is a data structure of an RTI pack according to the DVD audio standard.

FIG. 14 shows a data structure of an SPCT pack according to the DVD audio standard.

FIG. 15 is a diagram showing a recording area in a storage memory.

FIG. 16 is a specific data structure of AM824.

FIG. 17 is a specific example of the code in FIG. 16;

FIG. 18 is a specific example of real data using FIGS. 16 and 17;

[Explanation of symbols]

32 control means 40 storage memory 100 disk player (transmitting device) 200 reproducing device (receiving device) 188-1 to 188-4 serial interface 7-1 to 7-2, 13-1 to 13-2, 200a, 20
0a 'Data transfer interface (transmission means) 21-1 to 21-2, 200b, 200b' Data transfer interface (reception means)

Claims (4)

[Claims] A predetermined pack is formed from a data stream containing at least one of audio data and video data, and at least a downsampling flag, a downmix flag,
Alternatively, a signal processing device comprising packetization processing means for storing a dequantize flag and a secondary copy permission or prohibition flag and packetizing the packet in a format of a predetermined protocol. 2. A predetermined pack is formed from a data stream containing at least one of audio data and video data, and at least a downsampling flag, a downmix flag,
Alternatively, a transmission method comprising storing a dequantize flag and a secondary copy permission or prohibition flag, converting the packet into a packet corresponding to a serial interface of a predetermined standard, and transmitting the packet through the serial interface of the predetermined standard. . 3. A predetermined pack is formed from a data stream containing at least one of audio data and video data, and at least a downsampling flag, a downmix flag, or a dequantize flag is provided in a predetermined area in the data stream. Decoding means for receiving and decoding the data including the flag packetized in a format of a predetermined protocol by storing the copy additional information, and referring to the copy additional information.
A signal comprising: control means for judging next copy permission or prohibition; storage means for storing judgment result information obtained by the control means; and recording means for recording data of the decoding means. Processing equipment. 4. A predetermined data stream including audio data is formed, and in a predetermined area in the data stream, at least copy additional information, which is a downsampling flag, a downmix flag, or a dequantize flag, and each sample data. A transmission method, wherein a bit number flag of sample data is stored every time, converted to a serial interface of a predetermined standard, and transmitted through the serial interface of the predetermined standard.