JPH09214889A - Recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain quickly a reproduced image even from a boundary of consecutive shots by multiplexing clock information on a part of data for special reproduction after control information at the start of recording of the data. SOLUTION: Data for usual reproduction in a usual reproduction data buffer 109 are stored in a recording area for usual reproduction data. Then the end of the usual reproduction area is monitored and when the storage is finished, a succeeding recording area is discriminated. When an area is a recording area for data for special reproduction 1, a PAT.PMT(program association table.program map table) indispensable of data decoding is sequentially recorded and a time reference PCR(Program Clock Reference) is recorded. Then the data for special reproduction 1 in an I picture buffer 123 are recorded, the end of this area is monitored and when the recording is finished, a succeeding recording area is discriminated. Thus, in the case of making consecutive shot by generating data for special reproduction in this way, the PCR is multiplexed on data after a PSI (Program Specific information).

Description

Detailed Description of the Invention

[0001]

The present invention relates to a recording apparatus,
In particular, it relates to a device for recording encoded data.

[0002]

2. Description of the Related Art In recent years, digital processing of data has been actively studied. In particular, for high-efficiency coding for compressing image data, various methods have been proposed for standardization.
It is under deliberation, and among them, M is a general-purpose encoding method.
The PEG (Moving Picture Coding Expert Group) 2 system is ATV (Ad
Has been attracting attention, such as being adopted as vanced Television).

The MPEG2 system is a motion compensation type predictive coding system which compresses the amount of information by utilizing the correlation between screens and codes data. In FIG. 8, the arrow indicates the direction of prediction in encoding. Also. FIG. 9 shows MPEG2
It is a figure which shows the encoding process in a system, the arrangement | sequence of the data on a medium, and the order of the image data in a decoding process.

In MPEG2, G is used for a predetermined number of frames.
It constitutes OP (Group Of Pictures). And
Each GOP includes at least one intraframe-coded image.

The intra-frame coded image (hereinafter I image) is
It is an image encoded using only image data in one frame by DCT / quantization. The image data of each frame of every predetermined N frames from this I image is coded by interframe predictive coding (hereinafter referred to as P image). Further, the image data of each frame between the I image, the P image, and the P image is encoded by bidirectional predictive encoding using the image data of the front and rear frames (hereinafter, B image).

As shown in FIGS. 8 and 9, first, an I image is formed. As described above, the I image is encoded only by the image data in one frame, and the prediction operation using the data of other frames is not performed. Next, a P image is formed,
The B image is formed after the I image or the P image. Then, the I, P, and B images are transmitted in this order.

In MPEG2, encoded image data / sound data or other data stream is called an elementary stream. Further, as a structure for transmitting an elementary stream, PES (Packetized
Elementary Stream) packet is defined. This is PES header followed by PES payload (data section)
Has a structure followed by. In MPEG2, a set of elementary streams having a common time axis is called a program.

Two formats are defined in the MPEG2 multiplexing system. One is the transport stream,
The other is the program stream.

The definitions of both the transport stream and the program stream include the necessary and sufficient syntax for decoding the video and audio and synchronizing them during reproduction. Further, the program stream is one or more PES packets having a common time axis combined into a single data string, and the transport stream is one or more programs having one or more time axis combined. It is a single data string. In the above-mentioned ATV method, a transport stream is used.

In the transport stream, data such as image and audio is divided and transmitted in a transport unit of a fixed length of 188 bytes called a transport packet.

[0011] In such a transport stream, a PCR (Program
Clock Reference) and PSI (Program Specific Infor)
Information such as various identifiers called "mation" is appropriately incorporated, and the encoded data can be accurately decoded by detecting these data at the time of decoding.

In the PSI, PAT (Program Associ
ation table), PMT (Program Map Table) and other information for identifying PID (Packet ID), etc. are included. Using this information, the packet containing the target program and data is detected and decoded. Turn into.

As described above, since the I image is encoded only by the image data in one frame, the encoded data can be decoded alone. On the other hand, the P image and the B image are encoded using the image data of another frame, and therefore cannot be decoded by the encoded data alone.

The data length of each of the I, P and B image data is variable. Therefore, when it is considered to record the image data encoded by MPEG2 on a recording medium such as a magnetic tape, it is impossible to specify at which position on the medium the I image is recorded.

For example, when the data encoded by MPEG2 is recorded / reproduced on / from a magnetic tape by a device such as a digital VTR, when reproduced at the same speed as at the time of recording, the recording order, that is, the encoding The original image data can be reproduced accurately because they are reproduced in the order of reproduction.

However, during special reproduction such as high-speed search,
Since the head traces across the tape, each coded image I, P, B is not reproduced in the coded order. Moreover, each head traces only a part of each track,
Since the recording position of the image is not specified on the tape as described above, the I image is not always reproduced reliably. Therefore, image data cannot be accurately reproduced during special reproduction.

Therefore, when recording such MPEG2 coded data, it is conceivable to record the I image at a specific position on the tape in order to enable special reproduction. This will be described with reference to FIGS.

In FIG. 10, the ATV transport stream input to the input terminal 401 takes out the target transport packet in the packet detection circuit 403 and outputs it to the memory 405 as normal reproduction data.
Also, it outputs to the trick play data forming circuit 407.

The trick play data forming circuit 407 is
The PES header, sequence header, picture header, and intra slice streams to be recorded for special reproduction are taken out from the input transport stream, and PSI that is changed or newly generated is added. And
The header of each layer and the I image data are multiplexed for special reproduction and output to the multiplexer 409. The multiplexer 409 time-division-multiplexes these normal reproduction data and special reproduction data and outputs them to the magnetic head 411. The magnetic head 411 forms a large number of helical tracks on the tape 413 and records the data from the multiplexer 409.

Here, the multiplexer 409 switches between the normal reproduction data and the special reproduction data, and records the special reproduction data at a fixed place on the track. This situation will be described with reference to FIG.

As shown at 501 in FIG. 11A, two types of tracks having different azimuth angles are formed on the tape.

Reference numeral 503 indicates a trace miracle of the head when the tape is conveyed at a speed five times that of normal reproduction. FIG. 11 shows the reproduction envelope during this 5 × speed reproduction.
(B). Here, by recording the special reproduction data for 5 × speed reproduction in the shaded portion of the trace miracle 503, it is possible to stabilize the reproduced image during 5 × speed reproduction.

Similarly, by recording the image data for other reproduction speeds at positions that can be surely reproduced at the respective reproduction speeds, it is possible to obtain stable reproduced images at the other reproduction speeds.

[0024]

In the transport stream used in the above-mentioned ATV, P of PAT is used.
The ID is a fixed value of 0x000, and the PMT can be extracted by detecting this PAT.
The packet containing the target image or audio data can be detected by checking

Here, considering the case where the data stream for special reproduction is recorded in an area different from the data for normal reproduction as described above, the I image for special reproduction is extracted from the input transport stream. However, it is necessary to convert the data stream for special reproduction into a format that can be decoded by the ATV decoder.

For normal reproduction data, the terminal 40 shown in FIG. 10 is used.
When ATV data is input to 1, PAT, PMT,
Although PCR is properly incorporated, it is necessary to add necessary information to the code for special reproduction data as well.

Then, these PAT, PMT and PCR
When not considering the timing of multiplexing information such as
When recording data on a magnetic tape following recording by the device No. 0, that is, when performing so-called joint shooting, PCR of special reproduction data may be recorded before PSI packets such as PAT and PMT. is there.

That is, since the PSI necessary for PCR extraction cannot be obtained, if the PSI is recorded in this way, the next PC
There is a problem that the clock information cannot be obtained until R is obtained, and the reproduction image is delayed.

The present invention aims to solve the above problems.

Another object of the present application is to provide an apparatus capable of rapidly reproducing data from a recording medium.

[0031]

SUMMARY OF THE INVENTION In order to solve the conventional problems and to achieve the above-mentioned object, the present invention is for normal reproduction including encoded image data and decoding control data and clock data, respectively. A device for recording data and trick play data independently on a recording medium in a time series, wherein the control data and clock data for the trick play data are generated using input encoded data. Means, multiplexing means for generating the special reproduction data by multiplexing the control data, clock data and image data from the generating means, the normal reproduction data, and the special reproduction data from the multiplexing means. Recording means for recording on the recording medium, and the recording means for multiplexing the clock data after the control data in response to the start of recording the special reproduction data. It is constituted by a control means for controlling the load means.

[0032]

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

In this embodiment, the present invention is applied to an apparatus for recording / reproducing an MPEG2 transport stream (TS) or ATV bit stream.

In FIG. 1, the TS input to the input terminal 101 is the transport packet sync detection circuit 10.
4, input to the packet buffer 105. The transport packet sync detection circuit 104 detects sync_byte etc. in the transport header and controls the operation timing of the packet buffer 105 and each circuit of FIG.

The transport stream output from the packet buffer 105 is input to the switch 106, the PCR detection circuit 108, and the normal reproduction buffer 109, respectively.

FIG. 2 is a diagram showing an operation of selecting a desired program by the apparatus of FIG.

First, the PID detection circuit 107 detects a transport packet including PAT, that is, a transport packet having a transport header PID of 0x0000, and when this transport is detected, the switch 106 is connected to the end a. .

The input signal of the switch 106 is output from the a terminal and input to the PAT buffer 110.

Then, the transport packet having the PID of 0x0000 is downloaded to the PAT buffer 110. P downloaded to PAT buffer 110
AT is PAT selector 111 and PAT convert 141
Is input to The PAT selector 111 detects a program_map_PID that matches the recorded program number. The program_map_PID is a PID (element) of a transport packet containing a program to be decoded / recorded.
This is the PID of the transport packet in which the entry_PID) is described.

The PAT selector 111 detects the detected prog.
The ram_map_PID is input to the PID detection circuit 107.

Then, the PID detection circuit 107 receives the program received from the PAT selector 111 from the TS.
The transport packet having the PID that matches the _map_PID is detected, and the transport packet including the PAT is also detected at the same time as described above.

The PID detection circuit 107 is a program
When a transport packet having a PID that matches _map_PID is detected, the switch 106 is connected to the end b. The transport packet output from the end of the switch 106b is input to the PMT buffer 112, and the transport packet having the PID that matches the program_map_PID is downloaded to the PMT buffer 112. The PMT buffer 112 inputs the downloaded PMT to the PMT selector 113 and the PMT converter 143. The PMT selector 113 uses this PMT
Detects and selects the elementary_PID which is the PID of the transport packet having the desired program.

Here, in this embodiment, the PMT selector 1
The elementary_PID detected by 13 is
Let the video portion of the program to be recorded be the PID of a packetized transport packet.

The PMT selector 113 selects the selected element.
The entry_PID is input to the PID detection circuit 107.

When the transport packet including the PAT is detected as described above, the switch 106
Is connected to the end a and the same operation as described above is performed.

When the PMT selector 113 detects the elementary_PID, the PID detection circuit 107 detects a transport packet having a PID that matches the elementary_PID in the TS. Furthermore, at the same time, PA
Program_map_P obtained by T selector
A transport packet with a PID that matches the ID,
Alternatively, the transport packet including the PAT is detected. The PID detection circuit 107 is an elementar.
When the transport packet having the PID that matches the y_PID is detected, the switch 106 is connected to the c terminal.

At this time, the input signal of the switch 106 is output to the terminal c, and the transport packet having the PID matching the elementary_PID is input to the PES header detection circuit 115 and the PES header buffer 116.

When a transport packet having a PID that matches the program_map_PID is detected, the switch 106 is connected to the end b, and the PA
When a transport packet including T is detected, the first switch 106 is connected to the end a and the same operation as described above is performed.

The PCR detection circuit 108 selects P from TS.
CR is detected, TS is synchronized, and the detected PCR is input to the PCR converter 145. PCR is 27M
It is a 48-bit signal with Hz as a unit, and is a time stamp for obtaining the timing of the decoder.

The relationship between TS and PES is shown in FIG. FIG. 3 shows a PES packet of a desired program from the TS. In this embodiment, the PES header detection circuit 11 of FIG.
5. The stream input to the PES header buffer 116 is the video PES of the program to be recorded. P
The ES header detection circuit 115 detects the PES header and buffers the PES header information of the video packet to be recorded for special reproduction in the PES header buffer 116.

The stream output from the PES header detection circuit 115 is input to the sequence header extension detection circuit 117 and the sequence header extension buffer 118. The sequence header extension detection circuit 117 detects the sequence header and the sequence extension portion, and buffers the sequence header and sequence extension of the video data to be recorded for special reproduction in the sequence header extension buffer 118. The sequence header describes effective parameters (image size, bit rate, etc.) for the image. The sequence extension describes the extended part of the sequence header.

The stream output from the sequence header extension detection circuit 117 includes a picture header coding extension detection circuit 119 and a picture header coding extension buffer 1.
It is input to 20.

The picture header coding extension detection circuit 119 detects a picture header and a stream of picture coding extensions,
The picture header coding extension buffer 120 buffers the picture header and picture coding extension of video data to be recorded for special reproduction. The picture header describes coded image information, coding type (I, P, B), and the like. The picture coding extension describes information necessary for decoding the coded data, a picture structure, and the like. Also, the picture header coding extension detection 119
If the picture type of the stream input to is an intra-frame coded image, the switch 122 is controlled to be connected.

The stream output from the picture header coding extension detection circuit 119 is input to the slice detection circuit 121.

The slice detection circuit 121 detects the header of the slice and inputs it to the switch 122. Further, the slice detection circuit 121 controls to connect the switch 122 when an intra (intra-frame) slice stream is input.

The switch 122 connects the input and the output of the switch 122 when an intra-coded image or an intra slice stream arrives.

A slice is composed of a plurality of (at least one) macroblocks, and an intra slice is a slice composed of only intra macroblocks.

The output of the switch 122 is input to the I picture buffer 123. I picture buffer 123
Buffers only the intra-frame coded data and inputs the intra-frame coded data to the multiplexers 147 and 149.

The PAT converter 141 and the PMT converter 143 are supplied with PS so that they can be reproduced by distinguishing between various special reproduction data and normal reproduction data.
I is changed to another PSI or newly generated. This operation will be described with reference to FIG.

FIG. 2A shows an example of extracting the program to be recorded from the input PSI in this embodiment.

Here, it is assumed that the program No. to be recorded is the program 0x0180.

0x0180, which is the PID of the PMT with the program 0x0180, is detected from the PAT, and PID = 0x with the video and audio elementary streams is detected from the PID = 0x0180 packet with the PMT.
0181 and 0x0182 are detected, and the PIDs of the video and audio packets to be recorded are obtained.

The operation of the PAT converter 141 and the PMT converter 143 will be described with reference to FIG.

In this embodiment, the case where there are two types of special reproduction speeds will be described. Special reproduction speed 1 and special reproduction speed 2 (shown as special reproduction 1 and special reproduction 2 in FIG. 4. The speeds for special reproduction 1 and special reproduction 2 are speeds other than normal reproduction. ), PAT and PMT are newly added to PAT converter 141 and PMT converter 143, respectively.
Set with.

First, as the PAT, the program 0x0184 and PID = 0x0184 for special reproduction 1 and the program 0x0188 and PID = 0x0188 for special reproduction 2 are used.
Set. Next, each PMT is set. The PID for trick play 1 sets PID = 0x0185 of the elementary stream of the video for trick play 1. Similarly, PID = 0x0189 of the video elementary stream is set for special reproduction 2. Further, as the PID of the transport packet of the data for special reproduction 1 and 2, PID = 0x0185, PID = 0
Set x0189.

The PID for special reproduction newly set is PA
The PID of T is 0x0000, the PID of the conditional access table is 0x0001, the PMT for normal recording / reproduction, and the PID for each elementary stream for normal recording / reproduction are set so as not to overlap. Further, as the program number of the PAT, the program number for normal recording and reproduction and the program number of 0x0000 (when the program number is 0x0000, the PID of this program indicates network_PID) are operated so as not to be set.

The PCR converter 145 changes the inputted PCR for special reproduction or newly generates a PCR, and the multiplexer 13 together with the PAT and PMT.
Enter 0,134.

An example of a PCR changing method in the PCR converter 145 is shown below.

FIG. 5 shows a diagram for explaining the PCR changing method. The PCR is a time stamp for obtaining the timing of the decoder as described above.

When PCR is detected by the PCR detection circuit 108, the PCR converter uses tr as shown in equation (1) of FIG.
The answer_rate (i) is obtained, and a new PCR is generated as a PCR for special reproduction at regular intervals to record data. At this time, assuming that the newly generated PCR is PCR (i ″), FPCR (i ″) can be obtained using the equation (2). The PCR converter 145 generates the obtained PCR (i ″). After generating the PCR (i ″), the PC for special reproduction is generated.
As R, the same thing is performed at regular intervals.

At this time, the previous PCR (i ″) is converted to PCR.
A new PCR (i ″) is obtained as (i ′).

The multiplexer 130 multiplexes the PSI, header information of each layer, and intra-frame coded data for special reproduction. The timing of multiplexing is controlled by the CPU 529 as described later. An error correction code is added to the output of the multiplexer 130 by the parity generation circuit 131, and is input to the multiplexer 137 as data for special reproduction 1 via the buffer 132.

Similarly, in the multiplexer 134, the PS
I, header information of each layer, and intra-frame coded data are multiplexed for special reproduction, and the parity generation circuit 1
An error correction code is added at 35, and a multiplexer 137 is provided as data for special reproduction 2 via a buffer 136.
Output to

The normal reproduction data is input to the multiplexer 137 via the normal reproduction buffer 109.

In the multiplexer 137, the normal reproduction data output from the normal reproduction buffer 109, the special reproduction 1 data output from the first buffer 132, and the special reproduction 2 data output from the second buffer 136 are output. Are multiplexed on the track at positions where they can be reproduced at their respective reproduction speeds, converted into a recording track format, and input to the parity generation circuit 138. The parity generation circuit 138 adds an error correction code to the input data and outputs it as recording data to the terminal 140.

Next, the recording / reproducing mechanism will be described with reference to FIG.

In FIG. 1, the data stream including the special reproduction packet output to the terminal 140 is input to the input terminal 201 of FIG. 6 and subjected to digital modulation processing by the modulation circuit 203, and the pilot signal for tracking control. The components are multiplexed.

The modulated data is amplified by the recording amplifier 205 and recorded on the tape 209 by the head 207.

At the time of reproduction, the reproduction signal reproduced by the head 211 is amplified by the reproduction amplifier 213 and is demodulated by the demodulation circuit 215.
Is output to

In the demodulation circuit 215, the reproduced signal is 2
It is digitized, the sync signal is detected, the data is demodulated and added to the error correction code decoding circuit (ECC circuit) 217. Then, the data error is detected and corrected, and is output to the sync block memory 219 and the switch 223.

During normal reproduction, the switch 223 is the CPU 23.
It is switched to the N contact side by 1 and the normal reproduction data (I,
Only the data encoded by B and P) is the packetizing circuit 2
25. In the packetizing circuit 225, these reproduction data are packetized according to the packet format of TS of ATV or MPEG2, and the normal reproduction data are output from the output terminal 225 to the outside.

At the time of special reproduction, special reproduction data corresponding to the special reproduction speed is input to the sync block memory 219.

That is, the sync block memory 219 stores and reconstructs the intra-frame coded image, header information, and program information, and the error correction code decoding circuit 221 detects and corrects data errors. The output of the error correction coding / decoding circuit 221 is applied to the T-side contact of the switch 223, packetized by the packetizing circuit 225,
It is output from the output terminal 227.

In the sync block memory 219,
In order to cause the ATV decoder to perform the special reproduction image decoding / display operation such as search at the time of special reproduction, DSM_trick_mod of the PES header in the reproduction bit stream
Set e_flag to '1' and DSM trick mo
The de field is changed to the special reproduction mode at that time, and the bit stream is output.

The bit stream output from the output terminal 227 is input to the ATV decoder and decoded by an ATV decoder (not shown).

The CPU 231 receives signals from the switches on the operation unit 233 and switches installed in each mechanism, and transfers the tape by instructing the mechanism and the drive circuit 229 in the direction and speed.

Here, the CPU 2 for performing joint shooting
The operation of 31 will be described.

When recording is instructed by the switch on the operation unit 233, the CPU 231 starts the joint photographing operation.

First, the mechanical drive circuit 229 reverses the capstan to rewind the tape slightly.
Then, the playback operation is started while tracking is performed as in the normal playback. The amount of the tape to be rewound is set to the amount required for normal tracking. Then, the recording operation is started from the next track.

Next, the operation of the CPU 231 will be described with reference to FIG.
This will be described with reference to the flowchart of.

In FIG. 7, when a recording instruction is issued by the operation unit 233 (step S301), the magnetic tape is rewound by 10 tracks (step S302). Then, the reproducing operation is performed while tracking control is performed (step S305), and when the tracking is normally performed (step S307), the recording state is switched. (Step S309).

In the present embodiment, the positions where the special reproduction data are recorded are different for each track as shown in FIG. 11, so that the portion traced by the head is the normal reproduction data, special reproduction 1 data, and special reproduction data. The MUX 137 is controlled so as to output the data according to which data of the 2nd data is to be recorded (step S31).
1).

If it is the recording area for the normal reproduction data, the normal reproduction data in the normal reproduction buffer 109 is recorded (step 313). Then, the end of the normal reproduction area is monitored, and when it ends, the next recording area is determined (step S315).

In the case of the special reproduction 1 data recording area, the PAT and PMT essential for decoding the data are sequentially recorded (steps S317 and S321), and then the PCR serving as the time reference is recorded ( Step S323).
Next, the trick play 1 data in the I picture buffer 123 is recorded (step S325), the end of the area is monitored, and when the data is ended, the next recording area is determined (step S327).

Similarly, in the special reproduction 2 area, P
AT, PMT, and PCR are recorded in this order (step S
319, S329, S331), and then special reproduction 2 data in the I picture buffer 123 is recorded (step S333). Then, the end of the area is monitored, and when it is finished, the next recording area is discriminated (step S
335).

When each data is recorded as described above, the data is read again from the MUX 137 according to the next recording area (step S351).

That is, in the normal reproduction data area, the normal reproduction data in the normal reproduction buffer 109 is recorded (step S353).

Then, the end of the normal reproduction area is monitored (step S359).

In the case of the special reproduction 1 data area, ISI is inserted while PSI / PCR is inserted at a predetermined interval.
The trick play 1 data in the picture buffer 123 is recorded (step S355). Then, the end of the area is monitored (step S363).

Similarly, in the case of the special reproduction 2 data area, ISI is inserted while PSI / PCR is inserted at a predetermined interval.
The special reproduction 2 data in the picture buffer 123 is recorded (step S357), and the end of the area is monitored (step S365).

When the recording of the data for one track is completed, the instruction to end the recording from the operation unit 233 is monitored, and if not completed, the data is recorded on the next track (step S361).

The recording area can be discriminated by counting a reference clock by a counter (not shown) with reference to a rotation phase detection signal of the rotary head 205 (not shown) and based on this count value.

At this time, as described above, since the recording area of the data for special reproduction is different in each track, the count value to be detected also needs to be changed according to the track.

As described above, in the present embodiment, when data for special reproduction is created and joint shooting is performed,
Since the PCR is multiplexed and recorded after the PSI, the PCR is not recorded before the PSI packet such as PAT and PMT at the time of joint shooting.

Therefore, it is possible to prevent the image reproduction from being delayed in the joint shooting portion during the special reproduction.

In the present embodiment, the case where the present invention is applied to an apparatus for recording / reproducing an ATV bit stream has been described. However, besides this, data identification information and clock information are multiplexed and transmitted / recorded. The present invention can be applied to those that do.

[0107]

As is apparent from the above description, according to the present invention, the clock information is multiplexed after the control information at the start of recording the special reproduction data, so that the clock information can be reliably detected. Therefore, it is possible to quickly obtain a reproduced image even at the boundary portion of joint shooting.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a main part of a recording / reproducing apparatus as an embodiment of the present invention.

FIG. 2 is a diagram for explaining a recording data generating operation in the apparatus of FIG.

FIG. 3 is a diagram for explaining a recording data generating operation in the apparatus of FIG.

4 is a diagram for explaining a PSI generation operation in the device of FIG.

5 is a diagram for explaining a PCR generating operation in the apparatus of FIG.

6 is a block diagram showing a configuration of an apparatus for recording / reproducing data generated by the apparatus of FIG.

FIG. 7 is a flow chart for explaining the operation of the apparatus of FIGS.

FIG. 8 is a diagram showing how image data is encoded.

FIG. 9 is a diagram showing a state of encoding / decoding of image data.

FIG. 10 is a block diagram showing a configuration of an apparatus for recording / reproducing data encoded as shown in FIGS.

11 is a diagram showing a recording format on a tape in the apparatus shown in FIGS.

[Explanation of symbols]

 107 PID detection circuit 108 PCR detection circuit 141 PAT converter 143 PMT converter 145 PCR converter 231 CPU.

Claims (10)

[Claims] 1. A device for recording normal reproduction data and special reproduction data, each of which includes encoded image data, control data for decoding, and clock data, respectively, on a recording medium independently in time series. Generating means for generating the control data and clock data for the special reproduction data using input encoded data, and multiplexing the control data, clock data and image data from the generating means for the special reproduction. Multiplexing means for generating data, recording means for recording the normal reproduction data, and special reproduction data from the multiplexing means on the recording medium; and, in response to the start of recording of the special reproduction data, A control device for controlling the multiplexing means to multiplex the clock data after the control data. 2. The input coded data includes coded image data, control data for decoding, and clock data, and secondly generates the normal reproduction data using the input coded data. And a second multiplexing means for multiplexing the special reproduction data from the second generating means and the special reproduction data from the multiplexing means and outputting the multiplexed data to the recording means. The recording apparatus according to claim 1. 3. The recording means has a head for tracing the recording medium to form a large number of helical tracks, and recording the normal reproduction data and special reproduction data, and the control means further comprises: The second multiplexing means is controlled so that the special reproduction data is recorded in an area on the helical track corresponding to a trace locus of the head during the special reproduction. Recording device. 4. The generating means generates the control data and the clock data according to a plurality of special reproduction speeds, and the multiplexing means generates the special reproduction data according to a plurality of special reproduction speeds. The recording apparatus according to claim 1, wherein: 5. The first detecting means for detecting identification information for identifying a plurality of programs included in the input coded data, and the second detecting means for detecting clock data for a desired program. Means for generating control data for the special reproduction data according to the output of the first detection means, and generating clock data for the special reproduction data according to the output of the second detection means. The recording apparatus according to claim 1, wherein: 6. The recording apparatus according to claim 1, wherein the image data includes intra-frame encoded data and inter-frame encoded data. 7. The recording apparatus according to claim 1, wherein the input encoded data is MPEG2 encoded data. 8. The recording apparatus according to claim 1, wherein the input encoded data is ATV encoded data. 9. The control data is PSI and the clock data is PCR.
The recording device according to claim 1. 10. An apparatus for recording, on a recording medium, normal reproduction data and special reproduction data, each of which includes encoded image data, control data for decoding and clock data, respectively, independently in time series. A recording apparatus, wherein the clock data is multiplexed after the control data to generate the special reproduction data, and the special reproduction data is recorded on the recording medium.