JP3073244B2 - Information recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording apparatus, and more particularly to an information recording apparatus for recording and reproducing received still picture information.

[0002]

2. Description of the Related Art High-definition television signals (hereinafter simply referred to as HD
TV signals) have a large number of scanning lines and extremely fine images, so they are expected to be used as transmission forms for still images, such as art works such as paintings, animations, medical still images, and product catalogs. Have been.

When transmitting a still image as a broadcast wave as described above, it is conceivable to compress the image so as not to degrade the image quality, and to add a synchronization code and an error correction code (hereinafter, simply referred to as ECC). Various media can be considered as a medium for storing the still image on the receiving side. Generally, a random access is possible, and a disk-shaped recording medium is suitable from the viewpoint of cost and capacity.

FIG. 2 shows a system configuration in which a still image signal transmitted as described above is received and recorded on a disk-shaped recording medium, and is configured using a conventional general technique. FIG. In the figure, reference numeral 1 denotes a tuner for receiving a coded still picture information code transmitted as a broadcast wave and extracting it as an electric signal, and 2 denotes an ECC added to the still picture code extracted by the tuner 1. An ECC decoding circuit 4 for decoding and error correction is a buffer for transmitting the error-corrected still picture information code to a bus A functioning as an address back and a data bus.

[0005] Reference numeral 40 denotes a microprocessing unit (MPU) for exchanging information data and address data with each device via a bus A. Buffer 4
The still image data transmitted to the bus A via the MPU 40
After being converted into a code form suitable for recording data in the MPU 40, the recording data is captured by the disk recording circuit 21 via the bus A.

The disk recording circuit 21 performs processing such as modulation necessary for recording on the still image code processed by the MPU 40 and supplies the processed still image code to the disk device 22. The disk device 22 records a still image signal on a disk-shaped recording medium.

The still picture signal reproduced from the disc-shaped recording medium in the disc device 22 is converted into a code by a disc reproducing circuit 23, further supplied to the MPU 40 via the bus A, and converted into the original code form by the MPU 40. Will be returned. M
The PU 40 supplies the still picture information code returned to the original code form to the buffer 13 via the bus A. The still picture information code is output from the output terminal 17 via the buffer 13 and supplied to a monitor device or the like having a built-in decoder for the compression code.

[0008]

Assuming the above system, various codes necessary for transmission as broadcast waves are added to the still image information code data. Therefore, when recording such transmission code data on a disk-shaped recording medium, a large-capacity recording medium is generally required even when a small number of still images are recorded.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and it is possible to record a large amount of information on a recording medium by recording only received packets that are valid for the apparatus. It is intended to provide a possible information recording device. In order to solve this problem, for example, an information recording apparatus of the present invention has the following configuration. That is, in an information recording apparatus that receives information as a packet and records the information on a recording medium on which information can be written and read, the information of the header of the received packet is identified, so that the packet holds valid data. Discriminating means for discriminating between a packet and an invalid packet; counting means for counting packets discriminated as invalid packets by the discriminating means; and invalid packet for removing packets discriminated as invalid packets by the discriminating means. And a storage unit for storing data corresponding to the count value of the invalid packet counted by the counting unit together with the valid packet in the recording medium.

A further object of the present invention is to provide an information processing apparatus capable of recording and reproducing a large amount of information on a recording medium by recording only received packets that are valid for the apparatus. It is assumed that. In order to solve this, for example, the information processing apparatus of the present invention has the following configuration. That is, the information is received as a packet,
In an information recording apparatus for recording information on a recordable and readable recording medium, discriminating whether the packet is a valid packet holding valid data or an invalid packet by identifying information of a header of the received packet. Means, counting means for counting packets determined by the determining means to be invalid packets, invalid packet removing means for removing packets determined to be invalid packets by the determining means, and counting by the counting means Storage means for storing data according to the counted value of the invalid packet together with the valid packet in the recording medium, reading means for sequentially reading information from the recording medium, and counting the invalid packet count in the read information. An invalid packet corresponding to the count value is generated according to the corresponding data, and the invalid packet exists. Insert the invalid packet generated in the stomach position, and an output means for outputting sequentially the each packet at a predetermined reproducing apparatus.

[0011]

In the configuration of the present invention, the discriminating means identifies the information of the header of the received packet,
It is determined whether the packet is a valid packet holding valid data or an invalid packet. Then, the number of packets determined to be invalid packets is counted, and the invalid packets are removed. Then, data corresponding to the count value of the invalid packets is stored together with the valid packets.

[0012]

Embodiments of the present invention will be described below in detail.

FIG. 1 is a block diagram showing a schematic configuration of a still picture information and audio information recording / reproducing apparatus according to an embodiment of the present invention. FIGS. 3 and 4 show still pictures to be recorded in the apparatus of FIG. It is a schematic diagram for demonstrating the transmission format of the transmission code of a picture and audio | voice.

In FIG. 1, the same components as those in FIG. 2 are denoted by the same reference numerals.

In this embodiment, it is assumed that the transmission codes of the still picture and audio to be recorded are transmitted in a packet data format as shown in FIG. In FIG. 3, FS is a 16-bit frame synchronization code, and CC is 16 bits.
A frame control code of bits
C is, for example, a code indicating the content of the main information code contained in each of the following packets, and furthermore, its arrangement and the like. One frame includes seven packets each having 288 bits as shown, and a total of 2048 (= 16 + 16 + 288 ×
7) Consists of bits.

The code arrangement of each packet is the same, one of which is shown in FIG. In FIG. 4, HS is a 16-bit synchronization identification code (synchronization identification information) that forms the header of each packet. The synchronization identification code indicates the head of each packet and is transmitted by this code string. Indicates the type of information (mode). Also, H
C is a 16-bit header control code (attribute information) indicating the content of the information code for each packet. In the present embodiment, C is a still image information code or an audio information code, and is used to synchronize these codes. And the like. Also,
Immediately after the synchronization identification code HS and the header control code HC, 17
Data, which is a 4-bit main information code, follows, and this data is followed by an 82-bit error check bit, thereby constituting one packet of 288 bits.

In the recording / reproducing apparatus of this embodiment, the frame synchronizing code FS, the synchronizing identification code HS, and the 82-bit error check bit are deleted from the above-mentioned code string and recorded. The reason is that the frame synchronization code FS and the synchronization identification code HS are merely codes for synchronizing codes and identifying codes in a transmission path, and are not necessary for recording or reproduction or require a large number of bits. Because it does not. The mode information included in the synchronization identification code HS is unnecessary if the recording / reproducing apparatus of this embodiment is used exclusively for recording and reproducing still images and audio. Regarding the ECC deletion, a code suitable for correcting an error generated in a transmission line of a broadcast wave should be added. However, it is not necessary to use this kind of ECC at the time of recording and reproduction. It is.

Hereinafter, the operation of the apparatus of this embodiment during recording will be described with reference to the flowchart of FIG. The following recording operation is executed when the user operates the operation unit (not shown) and gives a recording instruction. A control program for realizing the processing described below is stored in a ROM in the MPU 40.
Is stored in

The information code string received via the tuner 1 is input to the ECC decoding circuit 2 and the frame synchronization separation circuit 5 (step S1). The ECC decoding circuit 2 decodes the ECC (error check code) added to the input code and corrects the main information error (step S2). After the error correction processing has been executed, the data is written to a predetermined address of the memory 3 (step S3).

On the other hand, the frame synchronization separation circuit 5 separates the frame synchronization signal FS in the input code and the synchronization identification code HS in each packet, and outputs the separated result to the memory control circuit 6 and the timing signal generation circuit 7. Output (Step S4).

The memory control circuit 6 sequentially accesses a predetermined address of the memory 3 based on the timing signal from the frame synchronization separation circuit 5 and transfers the already written data to the buffer 4. However, the memory control circuit 6 outputs the frame synchronization signal FS,
The other data is transferred to the buffer 4 so as not to read out the synchronization identification codes HS and ECC (Step S).
5). When writing the data processed by the ECC decode 2 into the memory 3, the above-described FS, HS, and ECC may be excluded. In any case, data other than the frame synchronization signal FS, the synchronization identification code HS, and the ECC are written in the buffer 4 and then transmitted to the extension bus A. At this time, the timing signal generating circuit 7 determines the timing at which the code at the head of the frame and the code at the head of each packet are transmitted from the buffer 4 to the extension bus A in accordance with the frame synchronization signal FS and the synchronization identification code HS. Is transmitted to the control bus C.

The MPU 40 includes a timing signal generation circuit 7
, Receives the still image / sound code data transmitted to the extension bus A, and performs a process suitable for recording the data on the disk device 22. Then, a signal is sent to the control bus C at the timing of returning the code at the head of the frame and the code at the head of each packet to the extension bus A, and the data is transmitted to the extension data bus A. Still image sent from MPU 40
The audio code is taken into the disk recording circuit 21 via the extension bus A, and its transmission timing signal is taken into the timing control circuit 20. The disk recording circuit 21
The still image / audio code processed in U40 is subjected to modulation processing and the like necessary for recording, and is supplied to the disk device 22. The disk device 22 records information on a recording medium inside the disk device 22 based on the modulated signal (step S7). still,
At this time, the recording position and the like are controlled by the disk control circuit 20. For example, the data is divided into sectors for each frame or each packet and recorded.

Next, the operation of reproducing information recorded on the disk device 22 will be described with reference to the flowchart of FIG.

When the MPU 40 detects that the user has urged a reproduction instruction via the operation unit, the MPU 40 outputs a signal indicating the reproduction instruction to the disk reproduction circuit 23. In response, the disk reproducing circuit 23 converts the still image / audio signal read from the disk device 22 and reproduced into a code. At this time, the timing control signal generation circuit 24 detects the head portion of each packet or each frame in the form of sector division, and outputs a signal to that effect at the timing output from the reproduction circuit 23 to the extension bus A. Send to control bus C. Upon receiving this timing signal, the MPU 40 captures the still image / audio code transmitted from the disk reproduction circuit 23 and converts the code into the original code form (that is,
At the recording stage, the data is returned to the data read from the buffer 4 (step S11).

The MPU 40 sends the still picture / audio code obtained by returning to the original code form to the buffer 13 via the extension bus A, and indicates the timing of sending the head of each packet or each frame. The timing signal is transmitted to the timing control circuit 1 via the control bus C
1 (step S12).

The still picture / audio code stored in the buffer 13 is then stored in the memory 14 under the control of the memory control circuit 12.
Will be written to. The memory control circuit 12 relatively controls the timing of writing / reading the code to / from the memory 14 based on the timing signal from the timing control circuit 11 (step S13). That is, the memory control circuit 12 reads out from the buffer 13 and stores it in the memory 14 in consideration of outputting the code string as shown in FIGS. 3 and 4. More specifically, the buffer 13 stores the frame synchronization code FS, the synchronization identification code HS of each packet, and the ECC of 82 bits in a deleted state. This will create a blank space for insertion.

The code string in which the vacant part of the code is formed in this way is supplied to the ECC encoding circuit 15, and the same ECC as the ECC added to the transmission code string is added to the corresponding vacant part. Then, the frame identification code FS and the synchronization identification code HS described above are restored by the synchronization identification code adding circuit 16 and added to the corresponding blank portion (step S15). Thus, the synchronization identification code adding circuit 16
Will output a signal substantially the same as the code string received by the tuner 1 (step S16). The still picture / audio code obtained from the tuner 1 or obtained by the reproduction processing is supplied to the still picture decoder 31. The still image decoder 31 expands the input still image / audio code and supplies it to a monitor device (not shown) according to a synchronization signal included therein. Thereby, it is reproduced so that it can be actually perceived by humans.

It should be noted that the switch sw1 is set to the synchronization identification code adding circuit 16 at the time of reproduction, although the
Side. The switch sw1 may be of a manual type by the user or of a type that can be automatically switched under the control of the MPU 40. It is assumed that a control program for implementing the above-described processing (FIGS. 5 and 6) is stored in the ROM in the MPU 40.

As described above, according to the apparatus of the embodiment, the code stored in the disk device 22 is actually the frame synchronization code FS and the synchronization in each packet with respect to the received transmission code. It can be understood that the identification code HS and the ECC for 82 bits have been deleted, and the amount of information has been reduced. In other words, the disk device 22 can record and reproduce more information.

Actually, in the embodiment, 16 bits of the frame synchronization code FS, and in 7 packets, HC
16 bits and ECC 82 bits are deleted. Therefore, a total of 702 bits (= 16 +
This means that (16 + 82) × 7) information has been omitted. This means that the amount of information can be reduced to 2/3 or less of one frame information actually received.

FIG. 7 is a block diagram showing a schematic configuration of a still picture / audio recording / reproducing apparatus according to another embodiment of the present invention. In the drawing, the same components as those in FIG. Omitted.

In the apparatus shown in FIG. 7, each of the above-mentioned timing signals is transmitted and received without using the control bus C. At the time of recording, a code string transmitted from the buffer 4 to the extension bus A is changed to a frame synchronization signal. A control signal of about 4 to 8 bits is added. This control signal is added by a timing control signal adding circuit 8 connected to the subsequent stage of the memory 3 in accordance with the frame synchronization signal separated by the frame synchronization separation circuit 5, and in accordance with the control signal, the MPU 4
0 is performed. Also, the disk device 22
The timing of the sector division recording is controlled by a timing control signal separation circuit 26 which separates the control signal from the code string supplied to the disk recording circuit 21.

Similarly, at the time of reproduction, the output stage of the disk reproduction circuit 23 outputs a signal which changes to a frame synchronization signal.
A timing control signal adding circuit 27 for adding a control signal of up to about 8 bits is provided, and the processing in the MPU 40 is performed according to the signal added by the circuit 27. Further, the above-mentioned empty portion is formed according to the control signal separated by the timing control signal separating circuit 17 from the code string output from the buffer 13.

According to the configuration as described above, the amount of codes to be recorded and reproduced slightly increases as compared with the example of FIG. 1, but it is expected that the configuration of the entire system can be simplified.

In the first and second embodiments, the frame synchronization code FS, the synchronization identification code HS, and the parity check code (ECC) of each frame are removed when being recorded in the recording device 22. However, it is also possible to remove unnecessary packets themselves. The details of the third embodiment for realizing this will be described below.

When recording a still picture broadcast on a disk device or the like, it must be said that it is inefficient to record all packets transmitted in real time. Because
In the case of a program configuration in which the screen does not change for a while after a single still image is sent, or in the case of a high compression ratio, many empty packets (invalid packets that are not image data, control data, or even audio data) It will be recorded.

In the third embodiment, the still picture broadcast is also shown in FIG.
It is assumed to be sent in the format shown in. In the illustration,
HS and HC are header portions located before the packet data portion, respectively. The header HS includes a synchronization code SYNC (including information indicating the type of service).
C includes ID information indicating whether the type of the data portion following the type is image data, control data for program configuration, or audio data.

For this apparatus, whether or not the packet is valid may be determined by examining the headers HS and HC in each packet.
That is, by examining these headers, if the following main information is not any of image data, control data for program configuration, and audio data, it can be determined that the packet is an invalid (insignificant) empty packet.

FIG. 8 is a block diagram showing the arrangement of the apparatus according to the third embodiment, and the outline of the operation will be described below.

The digital broadcast fetched into the apparatus through the input terminal 101 is received and demodulated by the receiving and demodulating circuit 102. Since the demodulated digital data is a continuous bit stream, the demodulated digital data is separated into individual packets in the separation circuit 103. Each packet is sent to the identification circuit 107
In the above, what the service is and what kind of packet of the service it is are identified, and each circuit described later is controlled based on the result. The identification circuit 107 includes:
A code indicating the type of packet that is valid for the apparatus is set in advance by the CPU 111. In the case of the present embodiment, it is determined from the header HS of the transmitted packet whether the packet data is a service code of a still image broadcast with audio, and whether the packet data is an audio-related packet or an image-related packet. Whether or not there is is identified from the header HC. In other cases, it is determined that the packet is not valid for the present apparatus, and is processed as an empty packet.
The service code includes, for example, a facsimile broadcast code in addition to the still image broadcast with sound.

If the identification circuit 107 determines that the received data is a packet of a still picture broadcast with audio, a signal to that effect is sent to the empty packet removing circuit 105, the empty packet number information adding circuit 106, and the empty packet. Number counter 1
08. The empty packet removing circuit 105 and the empty packet number information adding circuit 106 do not perform any processing when this signal is input from the identification circuit 107. That is, the packet of interest separated by the packet separation circuit 103 is written to the buffer 116 as it is. The empty packet number counter 1
When 08 receives the previous signal from the identification circuit 107, it resets the number of empty packets counted so far.

On the other hand, when the identification circuit 107 identifies that the packet of interest is an empty packet, it outputs to that effect to the empty packet removing circuit 105, the empty packet number information adding circuit 106, and the empty packet number counter 108. When the empty packet removing circuit 105 receives this signal, the delay circuit 104
It is assumed that the input data is invalid, and the data of the empty packet is not output to the subsequent circuits. When receiving the signal indicating that the packet of interest is an empty packet from the identification circuit 107, the empty packet counter 108 increments its own counter by "1". Therefore, when empty packets are continuously input, all empty packets between them are removed. Then, the number of removed packets is counted by the empty packet counter 108. Thus, when a packet of a still image with audio is received from the empty packet receiving state, the empty packet number information adding circuit 106 fetches the count value up to that from the empty packet number counter 108 and stores it in the buffer 116 in packet format. Write as data. In this case, the header H of the data
S and HC are provided with a code capable of identifying that the packet is an empty packet at the time of reproduction, and a header H
The number of empty packets is stored at a predetermined position in the main information following C. Note that, during this time, the packet of the still image with audio is stored in the delay circuit 104 and does not disappear. Therefore, after writing the empty packet count value into the buffer 116,
The received still image packet with audio is stored in the buffer 116.
Is written to. The CPU 111 performs a predetermined process for recording on the packet data written in the buffer 116, and then controls the packet data to be written to the disk device 110 via the disk control circuit 109.

At the time of reproduction, the CPU 111
, The respective packets recorded on the disk 110 are sequentially read and written into the buffer 117. The empty packet number information decoder 112 includes a buffer 117.
Then, if the packet is a packet of a still image broadcast with audio, a signal to that effect is output to the empty packet insertion circuit 114. Upon receiving this signal, the empty packet insertion circuit 114
The packet obtained through the terminal 13 is output from the output terminal 115 as it is. Also, the empty packet number information decoder 11
If it is determined that the data written in the buffer 117 is the data including the empty packet count value, the empty packet count value is decoded, and the empty packets corresponding to the count value are generated and output. Empty packet insertion circuit 11
Instruct 4 The empty packet number information decoder 112
Will send the packet of the still image with audio
The delay is delayed by the delay circuit 113 until the empty packet is reproduced and output. Each packet output from the output unit 115 is the same as the received packet sequence, and these are captured by a playback device (not shown) and played back as video and audio.

Here, a specific configuration around the identification circuit 107 in the third embodiment is shown in FIG. 10, and the operation will be described below.

First, prior to receiving data, the CPU 111
Sets the data into the register 107c in the identification circuit 107 so as to be able to identify what kind of header is input when the still image with audio is input in order to record the still image with audio. The data to be set is specified by the operator from a keyboard or an operation panel (not shown). Therefore, in some cases, when the data of the facsimile broadcast is set, the present apparatus becomes an apparatus for recording and reproducing the packet of the facsimile broadcast.

When data is set in the register 107c and recording is started, the headers HS and HC of each packet sequentially output from the packet separating circuit 103 are taken into the register 107a. And the comparator 10
7b compares the data latched in the registers 107a and 107c to determine whether or not the packet of interest is a packet of a still image broadcast with audio. The decoder 107d receives the signal of the comparison result from the comparator 107b, and outputs a signal corresponding to each component at a corresponding timing. Specifically, if it is determined that the packet is a still image broadcast packet with audio, the switch sw in the empty packet removing circuit 105 outputs a signal to select the input terminal a and enables the gate 105a. Output a signal,
Further, a signal for disabling 106c is output. The WRITE ENABLE terminal (WE) of the buffer 116
And the received packet is buffered.
To be written as is. Further, a reset signal is output to the empty packet counter 108.

When a signal indicating that the packet of interest is an empty packet that is not valid for the present apparatus is input from the comparator 107b, the decoder 107d disables the gate 105a and the gate 106c in the packet number information adding circuit 106, and disables the buffer 116. WRITE ENAB
Outputs a signal to disable the LE pin. At this time, the empty packet counter 108 is counted up. This process is repeated as long as empty packets continue to be input.

Next, when a packet of a still picture broadcast with audio is received after an empty packet continues, the decoder 10
7d designates a packet of interest as an empty packet removing circuit 10.
5, and the count value of the empty packet counter 108 at that time is transferred to the register 106b. The packet encoder 106a has a register 106
A dummy packet including the number of empty packets latched by b is generated. The decoder 107d enables the gate 106c and enables the WE of the buffer 116 to write the dummy packet generated by the packet encoder 106a into the buffer 116. At this time,
The dummy packet written in the buffer 116 is not different from a normal packet as shown in FIG. However, a service code indicating that the packet is an empty packet is added to the header HS, and the count value latched by the register 106b is inserted at a predetermined position in the main information. Next, the decoder 107d sets the input target of the switch sw to the terminal b, disables the gate 106c, enables the gate 105a, and sets the WRITE EN of the buffer 116.
By enabling the ABLE terminal, the packet of the still image with audio stored in the memory 105b is stored in the buffer 11
Write in 6. Thereafter, the above-described processing is repeated.

As described above, according to the third embodiment, when empty packets that are not valid for the apparatus are continuously received, information indicating the number of consecutive empty packets is stored. Thus, the program can be efficiently recorded on the disk 110. Also, during playback,
Since the same number of empty packets is inserted and reproduced at substantially the same position as the data at the time of reception, a normal reproduction apparatus reproduces a program at exactly the same time as the time management during broadcasting. In addition, a decoder (image decoder,
It is also possible to prevent the decoding capability of the audio decoder or the decoder of other services from being exceeded.

In the first, second and third embodiments described above,
The broadcast-received still image was recorded and output to a device capable of receiving and reproducing the broadcast. However, the present apparatus may reproduce the still image display, the sound, and the like so that the operator can understand it. This case can be achieved by incorporating a CRT or a speaker. At this time, the apparatus only needs to reproduce the data recorded on the disk as it is.

In the first to third embodiments, the recording medium is a disk-shaped one such as a magnetic disk or a magneto-optical disk. However, the present invention is not limited to this. For example, a magnetic tape or the like can be applied without any problem.

In the embodiment, the recording target is a still image with sound. However, the present invention is not limited to this, and may be, for example, sound, other video information, or facsimile data.

In the apparatus of the embodiment, a list of information recorded on the recording medium may be displayed on a display device, for example, and the operator may freely select one of the information to reproduce the information. good.

Further, in the first and second embodiments, an error check code or the like in each packet is removed and recorded on a recording medium. In the third embodiment, when an empty packet is received, the empty packet is received. The packet was removed and recorded.
Therefore, it is a matter of course that an apparatus having these characteristics can be constructed. This makes it possible to reduce the amount of data per frame and record more data on the recording medium.

The device of the present embodiment is particularly effective in a data communication system in which the transfer rate of data to be transmitted, such as a broadcast, is predetermined.

[0056]

As described above, according to the present invention, a lot of information can be recorded on a recording medium by recording only received packets that are valid for the apparatus. According to another aspect of the invention, it is possible to record a lot of information on a recording medium by recording only a received packet that is valid for the apparatus, and to reproduce the packet by a device capable of receiving and reproducing the packet. Becomes possible.

Further, if the error check bit in the received packet is also removed, in addition to the effects described above, the data amount to be recorded on the recording medium can be further reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram of an information recording apparatus according to a first embodiment.

FIG. 2 is a block diagram of the information recording apparatus.

FIG. 3 is a diagram showing a format of received data in the embodiment.

FIG. 4 is a diagram showing the contents of each packet in FIG. 3;

FIG. 5 is a flowchart illustrating a procedure of a recording process according to the first embodiment.

FIG. 6 is a flowchart illustrating a procedure of a reproducing process according to the first embodiment.

FIG. 7 is a block diagram of an information recording apparatus according to a second embodiment.

FIG. 8 is a block diagram of an information recording apparatus according to a third embodiment.

FIG. 9 is a detailed block configuration diagram around an identification circuit in a third embodiment.

FIG. 10 is a diagram showing a data format for recording a count value of invalid packets.

[Explanation of symbols]

 Reference Signs List 102 reception demodulation circuit 103 packet separation circuit 104 delay circuit 105 empty packet removal circuit 106 empty packet number information adding circuit 107 identification circuit 108 empty packet number counter 109 disk control circuit 110 disk 111 CPU 112 empty packet number information decoder 113 delay circuit 114 empty Packet insertion circuit

──────────────────────────────────────────────────続 き Continuation of the front page (72) The inventor Shinshu Yamashita 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (56) References JP-A-58-1810 (JP, A) JP-A-Hei 3-235589 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) H04N 5/91-5/956 G11B 20/10-20/12

Claims (8)

(57) [Claims] 1. An information recording apparatus for receiving information as a packet and recording the information on a recording medium on which information can be written and read, wherein identifying information of a header of the received packet.
More, discriminating means for discriminating valid packets or invalid packets which the packet has a valid data, a counting means for counting the packets is determined to be invalid packet by該判by means invalid packets by said discrimination means Is determined to be
Invalid packet removing means for removing a packet, and data corresponding to the count value of the invalid packets counted by the counting means are stored in the recording medium together with the valid packets.
An information recording apparatus, comprising: 2. The information recording apparatus according to claim 1, further comprising a designation unit for designating reference data for discriminating a valid or invalid packet by said discrimination unit. 3. The method according to claim 1, wherein the determining unit determines that the packet is a valid packet when the packet is determined to be information related to a still image with audio based on the identification information in the received packet, and determines that the packet is a valid packet otherwise. The information recording device according to claim 1, wherein 4. An information recording apparatus for receiving information as a packet and recording the information on a recordable and readable recording medium, wherein identifying information of a header of the received packet.
More, discriminating means for discriminating valid packets or invalid packets which the packet has a valid data, a counting means for counting the packets is determined to be invalid packet by該判by means invalid packets by said discrimination means Is determined to be
Invalid packet removing means for removing a packet , and counting the number of invalid packets counted by the counting means.
Storage means for storing the read data together with the valid packet in the recording medium; reading means for sequentially reading information from the recording medium; and reading the information according to the count value of the invalid packet in the read information. Output means for generating an invalid packet, inserting the generated invalid packet at a position where the invalid packet existed, and sequentially outputting each packet to a predetermined reproducing apparatus. 5. The information recording apparatus according to claim 4, further comprising a designation unit for designating reference data for discriminating a valid or invalid packet by said discrimination unit. 6. The method according to claim 1, wherein the determining unit determines that the packet is a valid packet when determining that the packet is information related to a still image with audio based on the identification information in the received packet, and determines that the packet is a valid packet otherwise. The information recording device according to claim 4, characterized in that: 7. Receiving, as a packet, main information and information including error correction code information for correcting an error in the main information,
An information recording apparatus for recording information on a recordable and readable recording medium, comprising: an error correction unit configured to correct the main information based on the error correction code information; and an error correction unit configured to determine whether the received packet is a valid packet holding valid data. discriminating means for discriminating whether invalid packet, is determined counting means for counting the path <br/> packet that is determined to be invalid packet by該判by means invalid packet by said discriminating means packet
Is determined as a valid packet by the determination means, and
Of the valid packet corrected by the error correction means.
Removing means for removing the error correction code information, and recording means for sequentially recording on the recording medium data corresponding to the information from which the error correction code information has been removed and the count value of invalid packets counted by the counting means. An information recording device comprising: 8. Receiving, as a packet, main information and information including error correction code information for correcting an error of the main information,
What is claimed is: 1. An information recording apparatus for recording information on a recordable and readable recording medium, comprising: an error correction unit configured to correct the main information based on the error correction code information; determined as the invalid packet by the first discriminating means and, said first discriminating means for discriminating whether packets or invalid packets
Counting means for counting the number of packets received, and a packet which has been determined as an invalid packet by the first determining means.
Packet and a valid packet by the first discriminating means.
The valid packet which has been separated and error-corrected by the error correction means.
Removing means for removing the error correction code information in the packet
When the recording means and sequentially reads reading means information from said recording medium for recording successively the recording medium data corresponding to the count of invalid packets counted by the information and the counting means for error-correcting code information has been removed Second determining means for determining whether the read information is data after error correction processing by the error correcting means or data according to the count value of invalid packets; A first packet generating means for generating error correction code information corresponding to the information and generating one packet when the information is determined to be information after the correction processing; and information read by the second determining means. When it is determined that is the count value of the invalid packets, a second packet generating means for generating the invalid packets for the number of the count values, and the first and second packets. Information recording apparatus and an output means for outputting to the outside of the predetermined reproducing apparatus according to the order read out each packet generated by the generating means by said reading means.