JPH1055614A - Coding/multiplexing system, coding device and multiplexer - Google Patents

Abstract

(57) [Problem] To provide an encoding / multiplexing system in which a processing time is short and control of compression encoding processing and multiplexing processing is simple. SOLUTION: Hard disk drives 20 (1), 20
(2) stores the processing result of the compression encoding processing. The encoding device 30 individually compresses and encodes a plurality of data, and writes the processing result alternately to the two hard disk devices 20 (1) and 20 (2) in program units. The multiplexing device 40 includes two hard disk devices 20 (1) and 20 (1).
The processing results of a plurality of data are alternately read from (2),
After this is packetized for each data, it is multiplexed for each packet. The control device 50 determines that the multiplexing device 40
Of the two hard disk drives 20 (1) and 20 (2), the processing result is read from the hard disk drive to which the encoding device 30 has not been written.
The operations of the encoding device 30 and the multiplexing device 40 are centrally controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an encoding / multiplexing system for individually encoding and multiplexing a plurality of data, such as a DVD authoring system.

[0002]

2. Description of the Related Art In general, a plurality of data such as video data, audio data, private data and the like are unified to create a program such as a movie, and this program is
When writing to a VD (Digital Video Disk), MPEG (Moving Picture Coding Experts)
Group) 2 is generated, and this program stream is written.

In order to generate an MPEG2 program stream, an encoding device (encoder) for individually compressing and encoding a plurality of data and a processing result (compression encoded output) of the encoding device are individually stored for each data. After that, an encoding / multiplexing system including a multiplexer (multiplexer) for multiplexing the packets in packet units is required. This encoding / multiplexing system is called a DVD authoring system.

In the DVD authoring system, when the processing result of the encoding device is supplied to the multiplexing device, it is supplied via a storage device such as a hard disk device. This is because, for one, the processing speeds of the encoding device and the multiplexing device are different, and it is necessary to provide a buffer between the two to absorb the difference in the processing speed. For one thing, because the circuit scale of the system is large, when developing an encoding device and a multiplexing device, it is easier to develop them separately and separately.

In the case where the processing result of the encoding device is supplied to the multiplexing device via the storage device, conventionally, as shown in FIG.
1 is connected to the encoding device 12, and when the compression encoding process is completed, the storage device 11 is manually stored in the multiplexing device 13.
It was designed to be supplied by connecting to.

[0006]

However, in such a configuration, when the number of programs to be processed increases, the operation of switching the connection destination of the storage device 11 must be performed many times. There is a problem that the processing time increases as the size increases. In addition, there is also a problem that the reliability of the processing is reduced due to an increase in user's labor.

[0007] As shown in FIG. 8, these problems are caused, for example, by using SCSI (Small Compatible) as an interface for connecting the storage device 11 to the encoding device 12 or the multiplexing device 13.
This problem can be solved by providing two initiators on the same bus and connecting the storage device 11 and the encoding device 12 or the multiplexing device 13 in a daisy chain by using the uter system interface (scady).

However, in such a configuration, the multiplexing device 13 cannot read the processing result from the storage device 11 while the encoding device 12 is writing the processing result to the storage device 11. Therefore, in such a configuration, the compression encoding process of the encoding device 12 and the multiplexing device 13
Multiplexing process should not be performed at the same time,
If they are performed at the same time, it is necessary to perform control with some restrictions in order to prevent collision between writing and reading of the processing result.

However, the former configuration has a problem that the processing time is twice as long as that of the latter configuration. Further, in the latter configuration, it is necessary to impose a time limit on the processing of one or both of the encoding device 12 and the multiplexing device 13, so that control of the compression encoding process and the multiplexing process is complicated. Problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an encoding / multiplexing system and an encoding / multiplexing system in which processing time is short and control of compression encoding processing and multiplexing processing is simple. A multiplexing device and a multiplexing device are provided.

[0011]

According to the present invention, two storage means are provided as storage means for storing processing results of encoding processing of a plurality of data, and processing of a plurality of data is performed in these two storage means. The result is alternately written in predetermined units, and the processing result of a plurality of data stored in the storage means is read out from the storage means to which the processing result has not been written out of the two storage means and multiplexed. By executing the encoding process, the encoding process and the multiplexing process can be executed simultaneously.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an embodiment of an encoding / multiplexing system according to the present invention. FIG. 1 shows a typical case where the present invention is applied to a DVD authoring system.

The illustrated system has two hard disk drives 20 for storing processing results of compression encoding of a plurality of data (eg, video data, audio data, private data, etc.) output from a data source (not shown). (1), 20 (2), and compression encoding of the plurality of data individually.
An encoding device 30 that writes alternately to the two hard disk devices 20 (1) and 20 (2) and a processing result of the compression encoding process that is alternately read from the two hard disk devices 20 (1) and 20 (2) in program units. And a multiplexing device 40 for packetizing the data for each data and then multiplexing the data in packet units.

Further, the system includes an encoding device 3 among the two hard disk devices 20 (1) and 20 (2).
0 so that the multiplexing device 40 reads the processing result from the hard disk device 20 (m) (m = 1, 2) to which the processing result has not been written.
A control device 50 for centrally controlling the operations of the encoding device 30 and the multiplexing device 40; and the control device 50 and the encoding device 30
And a bus 60 for connecting to the multiplexing device 40. The control device 50 is configured by, for example, a personal computer.

The encoding device 30 has two output ports, and the multiplexing device 40 has two input ports. The hard disk device 20 (1) is connected between one output port of the encoding device 30 and one input port of the multiplexer 40. In this case, for example, SCSI is used as the connection interface, and the hard disk device 20 (1) is daisy-chain connected to the encoding device 30 and the multiplexing device 40 by providing two initiators on the same bus. I have. Similarly, the hard disk device 20 (2) is provided with two initiators on the same bus, so that the encoding device 10 and the multiplexing device 4
0 and daisy-chained.

The hard disk devices 20 (1), 20 (2)
0 (2) has a function of writing data to the hard disk and a function of reading data from the hard disk in addition to the hard disk (storage medium). Therefore, in this case, the encoding device 30 writes the processing result into the hard disk devices 20 (1) and 20 (2).
The encoding device 30 is a hard disk device 20 (1), 20
This means instructing (2) to write the processing result to the hard disk. Similarly, when the multiplexer 40 reads the processing result from the hard disk devices 20 (1) and 20 (2), it means that the multiplexer 40
This means instructing (1) and 20 (2) to read the processing result from the hard disk.

The operation of the above configuration will be described. First, the control device 50 supplies the encoding device 30 with an instruction to execute a compression encoding process. Upon receiving the execution instruction, the encoding device 30 individually compresses and encodes a plurality of data supplied from a data source (not shown), and writes the processing result to, for example, the hard disk device 20 (1).

Next, the control device 50 supplies the multiplexing device 40 with a multiplexing process execution instruction. The multiplexing device 40
When the execution instruction is received, the processing result of the plurality of data is read from the hard disk device 20 (2) to which the processing result has not been written by the encoding device 30,
After these are packetized for each data, they are multiplexed in packet units. However, when the compression encoding process is the compression encoding process of the first program, the control device 50 does not output the execution instruction of the multiplexing process. This is because, in this case, the processing result is not yet stored in the hard disk drive 20 (2) to which the processing result has not been written by the encoding device 30.

Next, the control device 50 determines whether or not the compression encoding process of the encoding device 30 and the multiplexing process of the multiplexing device 40 have been completed. Then, when both processes are completed, an instruction to execute the compression encoding process is supplied to the encoding device 30 again, and an instruction to execute the multiplexing process is supplied to the multiplexing device 40. Upon receiving the execution instruction, the encoding device 30 compresses and encodes a plurality of input data, and writes the processing result to the hard disk device 20 (2). Upon receiving the execution instruction, the multiplexing device 40 reads out the processing results of a plurality of data from the hard disk device 20 (1) and multiplexes them.

Similarly, each time the compression encoding process and the multiplexing process for one program are completed, the above process is executed. Thus, the compression encoding process of the n-th (n = 1, 2,...) Program and (n−1) (n−1 =
The multiplexing process of the (1, 2,...) Th program is executed simultaneously.

In order for the multiplexing device 50 to appropriately read the necessary data processing results from the hard disk device 20 (m), it is necessary to recognize where and how many data processing results exist on the hard disk. is there. For this reason, during execution of the compression encoding process, the encoding device 30 creates a sector map indicating where and how much data is processed and how much data is written on the hard disk.
When the compression encoding process for the program is completed, this sector map is written to the hard disk device 20 (m). On the other hand, the multiplexing device 40 reads this sector map from the hard disk device 20 (m) before executing the multiplexing process, and appropriately reads necessary data from the hard disk device 20 (m) based on the sector map. It has become.

The writing of the sector map to the hard disk device 20 (m) may be performed at any time during the execution of the compression encoding process. However, since the processing performed after the end of the compression encoding processing does not hinder the compression encoding processing, the processing time of the compression encoding processing can be reduced and the control can be simplified.

FIG. 2 is a diagram showing an example of the storage state of the sector map and the result of the compression encoding process in the hard disk of the hard disk device 20 (m). The figure shows a case where, in a certain track, a sector map is stored in a sector having a number from 0 to 99, and a processing result of video data or the like is stored in a sector having a number of 100 or later.
FIG. 3 is a diagram showing an example of the sector map in the case of FIG. The illustrated sector map includes data (video, audio, private, etc.), the number of the first sector (start sector) of the area where the processing result is stored,
This area is represented by the size (sector size).

FIG. 4 is a block diagram showing an example of a specific configuration of the encoding device 30 constituting the encoding / multiplexing system shown in FIG. 1. FIG. It is a block diagram showing an example of a composition.

In these figures, the data sources are:
A video tape recorder (hereinafter, referred to as “VTR”) 70 for reproducing video data and audio data from a video tape, and a private generator 80 for generating private data are shown. These are connected to a control device 50 via a bus 60, and the operation timing is controlled by the control device 50. The drawing also shows a hard disk drive 90 as a storage device for storing the processing result of the multiplexing device 40, that is, a program stream.

The encoding device 30 shown in FIG.
, A video encoder 31 for compressing and encoding video data supplied from the VTR 70, an audio encoder 32 for compressing and encoding audio data supplied from the VTR 70, and compression encoding of private data supplied from the private generator 80. And a memory 34 for storing these processing results.

The encoding device 30 includes a memory 34
And a direct memory access control unit (hereinafter referred to as "DMAC") 35 for reading processing results from the DMAC.
The processing results read by the CPU 35 are supplied to the hard disk devices 20 (1) and 20 (2), and the disk interface blocks 36 (1) and 36 instruct the writing thereof.
(2). The disk interface blocks 36 (1) and 36 (2) are constituted by, for example, a SCSI protocol controller.

Further, the encoding device 30 includes a video encoder 31, an audio encoder 32, a private encoder 33, a DMAC 35, and disk interface blocks 36 (1) and 36 (2). A central processing unit (hereinafter referred to as a “CPU”) 37 for controlling the
An external interface circuit 38 for connecting the PU 37 and the control device 50 is provided.

The multiplexing device 40 shown in FIG. 5 instructs the hard disk devices 20 (1) and 20 (2) to read processing results and receives the read processing results by the disk interface blocks 41 (1) and 41 (1). (2), a memory 42 for storing a processing result of the compression encoding processing, and disk interface blocks 41 (1) and 41 (2).
To write the processing result received by
MAC43. The disk interface blocks 41 (1) and 41 (2) are, for example, SCSI
It is configured by a protocol controller.

The multiplexing device 40 packetizes the processing results of a plurality of data stored in the memory 42 for each data, and multiplexes them in packet units.
A memory 45 for storing the processing result of the multiplexer 44, a DMAC 46 for reading the processing result stored in the memory 45, and a processing result read by the DMAC 46 to the hard disk device 90, Disk interface block 47 instructing the writing
And The disk interface block 4
7 is constituted by, for example, a SCSI protocol controller.

Further, the multiplexer 40 includes disk interface blocks 41 (1), 41 (2) and 47,
A CPU 48 for controlling the DMACs 43 and 46;
An external interface circuit 49 for connecting the PU 48 to the control device 50 is provided.

The operation of the above configuration will be described. First, the operation of the control device 50 will be described with reference to FIG. Here, FIG. 5 is a flowchart showing the processing of the control device 50.

The illustrated processing is started, for example, when the power switch of the system is set to the ON state.
In this processing, the control device 50 first determines whether or not the user has operated a start key for instructing the start of the processing (step S11). When the start key is operated, the control device 50 sets the program number P to 0 (step S12). Next, the control device 50 supplies a data reproduction command to the VTR 70 via the bus 60, supplies a data output command to the private generator 80, and further supplies the encoding device 30 with the compression encoding process. Provides execution instructions.

Next, the control device 50 sets the program number P
Is determined to be not 0 (step S14), and if it is 0, it is determined whether or not the compression encoding process of the encoding device 30 is completed (step S16). This determination processing is continued until the compression encoding processing ends. In contrast,
If the program number P is not 0, via the bus 60,
After supplying the multiplexing device 40 with the execution instruction of the multiplexing process of the immediately preceding program (the program having the program number (P-1)) (step S15), it is determined whether the compression encoding process is completed. (Step S16). In this case, since the program number P is set to 0, immediately after the processing of step S14 is completed, step S1 is executed.
6 is executed.

When the compression encoding process is completed, the control unit 5
0 determines whether the multiplexing process of the multiplexing device 40 has been completed (step S17). This determination process is continued until the multiplexing process ends. In this case, since the multiplexing process has not been executed, a determination result indicating that the process has been completed is immediately obtained. When the multiplexing process is completed, the control device 5
If it is 0, it is determined whether or not the stop flag is set (step S18). This stop flag is set when the user operates a stop key for stopping the processing.

When the stop flag is set, the processing of the control device 50 ends. On the other hand, if the stop flag has not been set, the control device 50 determines whether or not preparations for performing the processing of the next program have been completed (step S19). Specifically, the VTR 70
Whether the next video tape is set or not, and the encoding device 3
It is determined whether an encoding parameter of 0 has been set.
This determination is continued until the preparation is completed. When the preparation is completed, the control device 50 supplies a command to switch the ports (disk interface blocks 26 (m) and 41 (m)) to the encoding device unit 30 and the multiplexing device unit 40 via the bus 60. (Step S20). This port switching command is supplied to CPUs 37 and 48 via external interface circuits 38 and 49, respectively.

Next, the control device 50 increments the program number P (step S21), and proceeds to step S1.
3 and the above-described processing is executed again. As a result, this time, the program (2
And the multiplexing of the program with the program number P of 0 (the first program). Hereinafter, similarly, each time the compression-encoding processing of a certain program and the multiplexing processing of the program immediately before this program are completed, the above-described processing is executed.

The control operation of the control device 50 has been described above. Next, the compression encoding process of the encoding device 30 shown in FIG. 4 will be described.

When the VTR 70 receives a data reproduction command (see step S13 in FIG. 5) from the control device 50,
The video data and the audio data are reproduced from the video tape and supplied to the video encoder 31 and the audio encoder 32, respectively. Similarly, private generator 8
When 0 receives a data generation instruction (see step S13 in FIG. 5) from the control device 50, it generates private data and supplies it to the private encoder 33.

An instruction to execute the compression encoding process supplied from the control device 50 to the encoding device 30 (step S13 in FIG. 5)
CPU) via the external interface circuit 38
37. Upon receiving this execution instruction, the CPU 37 supplies the encoders 31, 32, 33 with an execution instruction of the compression encoding process. Upon receiving this execution instruction, the encoders 31, 32, and 33 compress and encode the input data,
The processing result is written into the memory 34. In this case, competition between the three processing results is arbitrated by the CPU 37.

When a predetermined amount of processing results are stored in the memory 34, the CPU 37 stores the processing results in the DMAC 35 and the disk interface block 36 (m) specified by the port switching command (see step S20 in FIG. 5). Supply the transfer instruction. Upon receiving the transfer command, the DMAC 35 reads out the processing result from the memory 34 and supplies it to the disk interface block 36 (m) designated by the port switching command.

Disk interface block 36
(M) receives a transfer command from the CPU 27 and outputs
The processing result supplied from the AC 35 is converted into a format according to the SCSI protocol, and the hard disk drive 20
(M), and instructs the hard disk device 20 (m) to write the data. Hard disk drive 20 (m)
Receives this instruction, writes the supplied processing result to the hard disk.

When this writing is completed, the encoder 31,
32 and 33 compress the input data again and write the processing result to the memory 34. When a predetermined amount of processing result is stored in the memory 34, the DMA
C35 and disk interface block 36 (m)
Transfers the processing result to the hard disk device 20 (m). Hereinafter, similarly, the hard disk device 20 (m)
Each time the transfer of the processing result to is completed, the above-described processing is repeated.

As described above, when the compression encoding process for one program is completed, the CPU 37 notifies the control device 50 via the external interface circuit 38 of the completion. Upon receiving this notification, the control device 50 determines that the compression encoding process has been completed, and determines whether the multiplexing process has been completed (see steps S16 and S17 in FIG. 5).

During the compression encoding process, the CPU 37 creates a sector map indicating which data processing result has been written to which sector of the hard disk in the hard disk device 20 (m) and how much the data has been written into the memory. 34 is written in a predetermined area. Then, after completing the compression encoding process for one program, for example, the created sector map is transferred to the hard disk drive 2 using the DMAC 35 and the disk interface block 36 (m).
0 (m). Thus, the sector map is written in a predetermined area of the hard disk in the hard disk device 20 (m).

The above is the compression encoding process of the encoding device 30. Next, the multiplexing process of the multiplexing device 40 shown in FIG. 5 will be described.

A multiplexing execution instruction (see step S15 in FIG. 5) supplied from the control device 50 to the multiplexing device 40 is transmitted to the CPU 4 via the external interface circuit 49.
8 is supplied. Upon receiving this execution instruction, the CPU 48 first supplies a sector map transfer instruction to the disk interface block 41 (m) designated by the port switching instruction (see step S20 in FIG. 5) and the DMAC 43.

Disk interface block 41
(M), upon receiving this transfer command, instructs the hard disk device 20 (m) to read the sector map. When the hard disk device 20 (m) receives this instruction,
The sector map is read from the hard disk and supplied to the disk interface block 41 (m). Upon receiving this sector map, the disk interface block 41 (m) converts the format into a data format inside the multiplexer 40, and then supplies the data to the DMAC 43. D
When the MAC 43 receives the sector map transfer command from the CPU 48, the disk interface block 41
The sector map supplied from (m) is written into the memory 42.

When the writing is completed, the CPU 48
The sector map written in the memory 42 is read and supplied to the multiplexer 44. Upon receiving this sector map, the multiplexer 44 calculates the number of sectors from which sector the processing result of each data is based on the sector map. Then, based on the calculation result, the multiplexing order and the like of the processing results of the plurality of data are determined. Then, based on this determination, the transfer instruction of the processing result of the first required data is
Supply to PU48.

When receiving the transfer command, the CPU 48 creates a transfer command for transferring the processing result of the data specified by the command from the hard disk device 20 (m) to the memory 42. This creation is performed according to the sector map stored in the memory 42 in consideration of the storage capacity of the memory 42. When the creation of the transfer command is completed, the CPU 48 supplies this to the disk interface block 41 (m) and the DMAC 43. Disk interface block 41 (m) and DMAC 43
Upon receiving this transfer command, transfers the processing result specified by this command from the hard disk device 20 (m) to the memory.

The CPU 48 transfers the memory 4
When a predetermined amount of processing result is written in 2, the processing result is read and supplied to the multiplexer 44. Upon receiving the processing result, the multiplexer 44 converts the processing result into an MPEG.
The packet is packetized according to the multiplexing standard of No. 2 and written into the memory 45. When the writing is completed, the CPU 48 determines, among the processing results of the data that the multiplexer 44 first needs,
If there is a processing result that has not been transferred yet, the transfer processing is executed. When this transfer is completed, the multiplexer 44
Will packetize the processing result obtained by this transfer,
Write to the memory 45.

In this manner, when all the multiplexing processing of the data processing result required first by the multiplexer 44 is completed, the multiplexer 44 issues a transfer instruction of the processing result of the data required next. It is supplied to the CPU 48. As a result, the above-described processing is performed on the processing result. Hereinafter, similarly, the above-described processing is performed on the processing results of all data. As a result, the processing results of a plurality of data are packetized for each data and multiplexed in packet units.

Each time a predetermined amount of processing results (processing results of the multiplexing process) are stored in the memory 45, the CPU 48 and the disk interface block 4
7 is supplied with a transfer instruction of this processing result. As a result, the processing result stored in the memory 45 becomes the DMAC
The data is transferred to the hard disk device 90 via the disk interface block 47 and the disk interface block 47. This allows
The multiplex result of a plurality of encoded data is stored on the hard disk of the hard disk device 90.

When the multiplexing process for one program is completed in this way, the CPU 48 notifies the control device 50 via the external interface circuit 49 of the completion. Upon receiving this notification, the control device 50 determines that the multiplexing process has been completed, and determines whether or not the stop flag has been set (steps S17 and S18 in FIG. 5). The above is the multiplexing process of the multiplexing device 40.

According to the present embodiment described above, the two hard disk drives 20 (1) and 20 (2) serve as storage means for storing the processing results of the compression encoding processing.
And these two hard disk devices 20 (1),
At 20 (2), the processing result of the compression encoding process is alternately written in units of a program, and the processing result is read from the hard disk device 20 (m) to which the writing has not been performed to execute the multiplexing process. Therefore, the compression encoding process and the multiplexing process can be performed simultaneously.

Thus, when the compression encoding process and the multiplexing process of one program are completed, the processing time can be shortened as compared with the configuration in which the compression encoding process and the multiplexing process of the next program are executed. Can be. That is, now
For simplicity, let T be the processing time of the compression encoding process and the processing time of the multiplexing process of N (N = 1, 2,...) Programs. In this case, in a configuration in which the compression encoding process and the multiplexing process of the next program are executed when the compression encoding process and the multiplexing process of one program are completed, the N programs are processed. Takes 2NT. On the other hand, in the present embodiment, 1
Except for the compression encoding process of the first program and the multiplexing process of the last program, it is possible to simultaneously execute the compression encoding process of a certain program and the multiplexing process of the immediately preceding program. As a result, the processing time of the N programs is (N + 1) T, which is about half of the above example.

Further, according to the above-described configuration, it is not necessary to consider the collision between the writing process and the reading process of the processing result on one hard disk drive 20 (m). It is possible to simplify the control configuration for controlling the conversion processing.

Although the embodiment of the present invention has been described in detail, the present invention is not limited to the above-described embodiment. For example, in the above embodiment, a case has been described in which the present invention is applied to a DVD authoring system. However, the present invention can also be applied to encoding / multiplexing systems other than the DVD authoring system. In addition, it goes without saying that the present invention can be variously modified and implemented without departing from the scope of the invention.

[0059]

As described above in detail, according to the coding / multiplexing system of the present invention, two storage means are provided as storage means for storing the processing results of the compression coding processing. The processing result of the compression encoding process is alternately written in a predetermined unit into two storage units, and the processing result is read out from the storage unit in which the processing result has not been written out of the two storage units, and multiplexed. Since the encoding process is executed, the processing time can be shortened, and the control configuration for controlling the compression encoding process and the multiplexing process can be simplified.

According to the encoding apparatus of the present invention,
Since the processing result of the compression encoding process is alternately written in two storage units by a predetermined unit, it is possible to provide an encoding device suitable for configuring the encoding / multiplexing system according to the present invention. it can.

Further, according to the multiplexing apparatus of the present invention, the processing result is stored in the storage unit in which the processing result is not written out of the two storage units for storing the processing result of the compression encoding process. Is read and the multiplexing process is executed, so that it is possible to provide a multiplexing device suitable for configuring the encoding / multiplexing system according to the present invention.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an encoding / multiplexing system according to an embodiment of the present invention.

FIG. 2 is a diagram for describing an encoding / multiplexing system according to an embodiment of the present invention, and is a diagram particularly illustrating an example of a storage state of processing results in a hard disk device.

3 is a diagram for explaining an encoding / multiplexing system according to one embodiment of the present invention, and is a diagram particularly showing an example of a sector map in a storage state shown in FIG. 2;

FIG. 4 is a block diagram illustrating an example of a specific configuration of an encoding device in an encoding / multiplexing system according to an embodiment of the present invention.

FIG. 5 is a block diagram showing an example of a specific configuration of a multiplexing device in an encoding / multiplexing system according to an embodiment of the present invention.

FIG. 6 is a flowchart showing an operation of the control device shown in FIGS. 4 and 5;

FIG. 7 is a block diagram showing a configuration of a conventional encoding / multiplexing system.

FIG. 8 is a block diagram showing a configuration of an encoding / multiplexing system that can be considered to solve the problem of the conventional encoding / multiplexing system.

[Explanation of symbols]

20 (1), 20 (2), 90 ... Hard disk device,
Reference numeral 30: coding device, 40: multiplexer, 50: control device, 60: bus, 70: VTR, 80: private generator, 31: video encoder, 32: audio encoder, 33: private encoding Vessels, 34, 42, 45 ...
Memory, 35, 43, 46... DMAC, 36 (1), 3
6 (2), 41 (1), 41 (2), 47 ... disk interface block, 37, 48 ... CPU, 38, 4
9 ... External interface block, 44 multiplexer.

Claims (3)

[Claims] An encoding unit for individually encoding a plurality of data; two storage units for storing processing results of the encoding unit; and a processing unit for storing a processing result of the encoding unit in a predetermined unit. Writing means for writing alternately into two storage means; and reading out the processing results of a plurality of data stored in the storage means from the storage means which has not been written by the writing means among the two storage means. An encoding / multiplexing system comprising: reading means; and multiplexing means for multiplexing processing results of a plurality of data read by the reading means. 2. A code comprising: coding means for individually coding a plurality of data; and writing means for alternately writing a processing result of the coding means to two storage means by a predetermined unit. Device. 3. A storage unit in which a processing result of a plurality of individually encoded data is alternately written in a predetermined unit from a storage unit in which the processing result is not written is stored in the storage unit. A multiplexing apparatus comprising: a reading unit that reads processing results of a plurality of stored data; and a multiplexing unit that multiplexes processing results of a plurality of data read by the reading unit.