JPH11340932A - Data compressor, data compression method, server system and its control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a server system to use a DVB output terminal as a valid channel. SOLUTION: A server bus controller 40 assigns a time slot to a server bus 50 so that compression data outputted from an encoder core are written in a hard disk 30 and assigns the same time slot as the time slot of other compression data read from the hard disk 30 to a DVB output circuit. In this case, the compression data outputted from the encoder core are written on the hard disk 30 via the server bus 50 or the like. Simultaneously a DVB output circuit 13 converts the other data read from the hard disk 30 into DVB compression data and provides an output of the converted data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data compression apparatus, a data compression method, a server system and a control method thereof suitable for use in a so-called AV server system.

[0002]

2. Description of the Related Art Recently, a video server has been provided which compresses data input from the outside by an encoder, stores the compressed data on a hard disk, decodes the stored compressed data by a decoder, and outputs the decoded data to the outside.

For example, as shown in FIG. 7, a conventional video server 100 converts video data into an MPEG (Moving P
encoder 11)
0, a plurality of decoders 120 for decoding the compressed data of the MPEG system, a hard disk drive (hereinafter referred to as “HDD”) 130 for storing the compressed data, and a server bus 150 for transmitting the compressed data from the encoder 110.
And a server bus controller 140 that controls writing to the HDD 130 or reading compressed data from the HDD 130 and supplying the compressed data to the decoder 120 via the server bus 150.

[0004] The encoder 110 converts the compressed data into H
It is configured such that it can not only be stored in the DD 130 but also output directly to the outside. Encoder 11
0, specifically, as shown in FIG. 8, an analog / digital (A / D) converter 111 for digitizing video data inputted from the outside, and compression of the compressed video data by compressing the digitized video data. An encoder core 112 to be generated and a DVB output circuit 113 for converting compressed data from the encoder core 112 into a DVB (Digital Video Broadcasting) system and outputting the converted data are provided.

[0005] The encoder core 112 converts the compressed data of the MPEG system into a server bus 150 and a server bus 150.
The data is supplied to the HDD 130 via the controller 140.

[0006] The DVB output circuit 113 outputs the compressed data as 1
The data is output in the DVB format, which is transferred for each 88-byte packet. Here, the DVB standard is a digital television standard standardized in Europe. Specifically, the three main media currently used for television broadcasting, terrestrial broadcasting, satellite broadcasting, and CATV, are standardized as much as possible to standardize receivers and reduce costs. For example, the MPEG2 system is adopted as a video / audio coding and multiplexing technique.

[0007]

SUMMARY OF THE INVENTION DVB output circuit 113
Simply converts the compressed data from encoder core 112 to DV
The video server 100 can only output in the B format.
Outputs data regardless of the function of. Therefore, from the viewpoint of the entire video server 100, there is only one terminal for DVB output, and it is not possible to control the output data of the DVB output terminal.

The present invention has been proposed in view of such circumstances, and a data compression apparatus, a data compression method, a server system, and a control method thereof, which can use a predetermined data output terminal as an effective channel. The purpose is to provide.

[0009]

In order to solve the above-mentioned problems, a data compression device according to the present invention compresses data input from the outside and supplies compressed data to a time slot bus; A converting means for taking in the compressed data from the time slot bus, converting the data into a predetermined standard, and outputting the data; a compressing means allocating a time slot of the compressed data to be supplied to the time slot bus; And control means for performing control for allocating a time slot for taking in data.

In the above data compression apparatus, the control means controls the compression means to allocate a time slot of the compressed data to be supplied to the time slot bus and / or the conversion means to allocate a time slot for taking in the compressed data from the time slot bus. Do.

The data compression method according to the present invention compresses data input from the outside, supplies the compressed data to a time slot bus, takes in the compressed data from the time slot bus, converts it into a predetermined standard, and outputs it. In this data compression method, control is performed to allocate a time slot of compressed data to be supplied to a time slot bus and / or to allocate a time slot for taking in compressed data from the time slot bus.

In the above data compression method, control is performed by allocating a time slot of compressed data to be supplied to the time slot bus and / or allocating a time slot for taking in compressed data from the time slot bus.
Independent channels can be provided, and channels for outputting compressed data of a predetermined standard can be used effectively.

A server system according to the present invention compresses data input from the outside and supplies compressed data to a time slot bus. The server system takes in the compressed data from the time slot bus and converts it into a predetermined standard. A data compression unit having a conversion unit for outputting compressed data; a data decompression unit for decompressing compressed data fetched from the time slot bus; a storage unit for storing compressed data supplied via the time slot bus; The compressed data output from the compression means, the compressed data input to the conversion means, the compressed data input to the data decompression section, the compressed data written to the storage section and / or the compressed data read from the storage section are subjected to a time slot bus. And control means for performing control for allocating a time slot in.

[0014] The server system may be configured such that the compressed data output from the compression unit of the data compression unit, the compressed data input to the conversion unit, the compressed data input to the data decompression unit, the data written to the storage unit, and / or Control is performed to allocate a time slot in the time slot bus to the read compressed data.

A control method for a server system according to the present invention comprises a compression means for compressing externally input data and supplying compressed data to a time slot bus; A data compression unit having conversion means for converting the data into data and outputting the data, a data decompression unit for decompressing the compressed data fetched from the time slot bus, and a storage unit for storing the compressed data supplied via the time slot bus. In the control method of the server system provided, the compressed data output from the compression unit of the data compression unit, the compressed data input to the conversion unit, the compressed data input to the data decompression unit, the data written to the storage unit, and / or Control to allocate time slots on the time slot bus to the compressed data to be read is performed. The features.

In the control method of the server system, the compressed data output from the compression unit of the data compression unit, the compressed data input to the conversion unit, the compressed data input to the data decompression unit, the data written to the storage unit, and / or By performing control for allocating a time slot in the time slot bus to the compressed data read from the storage unit, it is possible to have an independent channel, and to effectively use a channel for outputting compressed data of a predetermined standard. it can.

[0017]

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

The present invention is applied to, for example, an AV server system having the configuration shown in FIG. The above AV server system 1
Converts video data to MPEG (Moving Picture Experts)
Group) encoder, a plurality of decoders 20 for decoding MPEG compressed data,
Hard disk drive that stores compressed data
It is called "HDD". ) 30 and the server bus 50 which is a time slot bus for transmitting the compressed data from the encoder 10.
And a server bus controller 40 which controls writing to the HDD 30 via the server bus or reading compressed data from the HDD 30 and supplying the compressed data to the decoder 20 via the server bus 50.

The encoder 10 converts the compressed data into HD
In addition to storing the data in D30, the data can be directly output to the outside. The encoder 10
Specifically, as shown in FIG. 2, analog / digital (A) for digitizing video data input from the outside is used.
/ D) a converter 11 and a server bus 50 for compressing the digitized video data to generate compressed data.
Core 12 for supplying to the server bus 50
Compressed data from DVB (Digital Video Broadcasti
ng) and a DVB output circuit 13 for outputting the converted signal.

The encoder core 12 supplies the compressed data of the MPEG system to the HDD 30 via the server bus 50 and the server bus controller 40. Also, D
The VB output circuit 13 uses the DVB method of transferring the compressed data for each 188-byte packet, and uses the compressed data
It is called “DVB compressed data”. ) Is output to the outside via the output terminal 14.

The server bus controller 40
Assigns a time slot in the server bus 50 of each encoder 10 and the decoder 20, writes the compressed data from the encoder 10 to the HDD 30,
The compressed data in the HDD 30 is read and supplied to the decoder 20.

Next, the output operation of the encoder 10 will be described.

First, the server bus controller 40
Are connected to the server bus 50 by the encoder core 12
Can be assigned to the DVB output circuit 13. At this time, as shown in FIG. 3, the DVB output circuit 13 takes in the compressed data encoded by the encoder core 12 and supplied to the server bus 50 via the server bus 50 as it is, and converts it into DVB compressed data. And output.

That is, the encoder 10 can not only encode video data input from the outside, but also output the video data as DVB compressed data.

Second, the server bus controller 40
Are connected to the server bus 50 by the encoder core 12
Can be assigned to the DVB output circuit 13, and the compressed data of this time slot can be set to be written to the HDD 30. At this time, the DVB output circuit 1
As described above, 3 receives the compressed data encoded and output by the encoder core 12 as it is via the server bus 50, converts it into DVB compressed data, and outputs it. Further, as shown in FIG.
2 is written to the HDD 30 via the server bus controller 40.

That is, the encoder 10 can encode video data input from the outside and write it as compressed data in the HDD 30, and can also convert the video data into DVB compressed data and output it.

Third, the server bus controller 40
Can allocate the same time slot as the time slot of the compressed data read from the HDD 30 to the DVB output circuit 13 for the server bus 50. At this time, as shown in FIG.
The compressed data read out from the server 30 is taken in via the server bus 50, converted into DVB compressed data, and output.

That is, the encoder 10 is connected to the HDD 30
Can be converted into DVB compressed data and output.

Fourth, the server bus controller 40
Are connected to the server bus 50 by the encoder core 12
A time slot is allocated so that compressed data output by
The same time slot as the time slot of other compressed data read from 30 can be assigned to the DVB output circuit 13. At this time, the compressed data output from the encoder core 12 is written to the HDD 30 via the server bus 50 and the server bus controller 40.
At the same time, the DVB output circuit 13 takes in the other data read from the HDD 30 via the server bus 50, converts it into DVB compressed data, and outputs it.

Therefore, the encoder 10 can not only compress video data input from the outside, but also output other compressed data read from the HDD 30 as DVB compressed data in parallel with such processing. Each of the inputs and outputs can be treated separately, and in effect each can have independent input and output channels.

As described above, the encoder 10 can also be used as a channel encoder.
Channels for outputting VB compressed data can be handled independently of each other, and a function unique to the server can be realized.

[0032]

As described above in detail, according to the data compression apparatus and the data compression method of the present invention, the time slot of the compressed data to be supplied to the time slot bus is allocated and / or the compressed data is transmitted from the time slot bus. By performing control to allocate a time slot for capturing compressed data, it is possible to secure independence between a channel for generating compressed data from input data and a channel for outputting compressed data of a predetermined standard, and outputting compressed data of the predetermined standard. Channels can be used effectively.

Further, the server system and the control method thereof according to the present invention are characterized in that the compressed data output from the compression means of the data compression section, the compressed data input to the conversion means, the compressed data input to the data decompression section, By performing control for allocating a time slot in the time slot bus to the compressed data written to and / or read from the storage unit, not only the decompression unit but also compressed data of a predetermined standard is output. The conversion means can also function as independent output channels, and these channels can be used effectively.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an AV server system to which the present invention has been applied.

FIG. 2 is a block diagram showing a configuration of an encoder of the AV server system.

FIG. 3 is a diagram for explaining a state when the encoder captures compressed data.

FIG. 4 is a diagram for explaining a state when the encoder takes in compressed data.

FIG. 5 is a diagram for explaining a state when the encoder captures compressed data.

FIG. 6 is a diagram for explaining a state when the encoder takes in compressed data.

FIG. 7 is a block diagram showing a configuration of a conventional AV server system.

FIG. 8 is a block diagram showing a configuration of an encoder of the AV server system.

[Explanation of symbols]

1 AV server system, 10 encoder, 20 decoder, 30 HDD, 40 server bus controller, 50 server bus, 12 encoder core,
13 DVB output circuit

Claims (10)

[Claims] 1. A compression means for compressing data input from the outside and supplying compressed data to a time slot bus, and a conversion means for taking in the compressed data from the time slot bus, converting the data into a predetermined standard, and outputting the data. Control means for allocating a time slot for compressed data to be supplied to the time slot bus by the compression means and / or controlling the conversion means to allocate a time slot for taking in compressed data from the time slot bus. apparatus. 2. The control unit according to claim 1, wherein the control unit performs control for allocating different time slots to the compressed data output from the compression unit and the compressed data input to the conversion unit. Data compression equipment. 3. A data compression method for compressing data input from the outside, supplying compressed data to a time slot bus, taking in the compressed data from the time slot bus, converting the data into a predetermined standard, and outputting the data. A data compression method comprising: allocating a time slot of compressed data to be supplied to the time slot bus and / or allocating a time slot for taking in compressed data from the time slot bus. 4. The method according to claim 1, wherein the time slot is assigned as
4. The data compression method according to claim 3, wherein different time slots are assigned to the compressed data output to the time slot and the compressed data input from the time slot. 5. Compression means for compressing externally input data and supplying compressed data to a time slot bus.
A data compression unit having conversion means for receiving the compressed data from the time slot bus, converting the data to a predetermined standard, and outputting the data; a data decompression unit for decompressing the compressed data received from the time slot bus; A storage unit for storing compressed data supplied via a bus, compressed data output from the compression unit of the data compression unit, compressed data input to the conversion unit, compressed data input to the data decompression unit, A server system comprising: control means for performing control of assigning a time slot in the time slot bus to compressed data written to and / or read from the storage unit. 6. The control unit performs control to allocate the same time slot as the time slot of the compressed data read from the storage unit to the time slot bus to the compressed data input to the conversion unit. 6. The server system according to claim 5, wherein the conversion means takes in the compressed data stored in the storage unit via the time slot bus. 7. The control unit performs control for assigning a time slot different from a time slot of the compressed data input to the conversion unit to the compressed data output from the compression unit. The compressed data stored in the storage unit is taken in through the time slot bus, and
7. The server system according to claim 6, wherein said compression means writes compressed data obtained by compressing data input from the outside to said storage unit via said time slot bus. 8. Compressing means for compressing externally input data and supplying the compressed data to a time slot bus.
A data compression unit having conversion means for receiving compressed data from the time slot bus, converting the data into a predetermined standard, and outputting the data; a data decompression unit for decompressing the compressed data received from the time slot bus; A control method for a server system comprising: a storage unit for storing compressed data supplied via a bus; a compressed data output by a compression unit of the data compression unit; a compressed data input to a conversion unit; A control method of allocating a time slot in the time slot bus to the compressed data input to the storage unit and the compressed data written to the storage unit and / or read from the storage unit. . 9. The time slot allocation includes:
9. The server system according to claim 8, wherein control is performed to assign the same time slot as the time slot of the compressed data read from the storage unit to the time slot bus to the compressed data input to the conversion unit. Control method. 10. The method according to claim 1, further comprising the step of allocating a time slot different from the time slot of the compressed data input to the conversion means to the compressed data output from the compression means. The method for controlling a server system according to claim 9, wherein