JPH05304660A - Picture information transmitter - Google Patents

Abstract

PURPOSE:To process a high fidelity picture even at a low speed by adding additional information to each compressed image data obtained by dividing and compressing an original picture, and mixing and outputting the image data on the same signal line. CONSTITUTION:The timing control of the delivery of image data to each compressor 4A-4D is operated based on a status control signal among the compressors 4A-4D and a control part 3. A screen division is operated by a D-MPX 1, and each image data are appropriately compressed by the compressors 4A-4D. Each compressed image data are inputted to an MPX 5, arranged on the same signal line, and the addition information is added to the image data by a control part 6, and the data are converted into a serial signal by P/S converter 7, and transmitted. And also, the output of each compressor can be discriminated by the addition information, and the addition information is prepared based on information transferred between two control parts 3 and 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image information transmission device.

[0002]

2. Description of the Related Art When storing image information when transmitting the image information, it is necessary to perform efficient compression because the image has a very large amount of information. Further, in a high-definition image such as a high-definition image, the amount of information is further increased, and there arises a problem that an unnecessary cost is required for transmission / storage, so image compression is performed. Generally, compression is performed by reducing temporal redundancy and spatial redundancy of moving images.

[0003]

However, in the current technology, it is possible to compress images in normal broadcasting (NTSC, etc.) without any problem, but in high quality images, the amount of information and the amount of calculation are large. However, high-speed signal processing is required, and it must be a large-scale and expensive system.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an image information transmission device which solves the above problems.

[0005]

To achieve the above object, the present invention provides a demultiplexer for dividing original image data into a plurality of image data, and a plurality of compressors for compressing each image data divided by the demultiplexer. And a multiplexer for adding the additional information to each of the compressed image data compressed by each of the compressors and mixing and outputting the compressed image data on the same signal line. Demultiplexer for separating a plurality of image data from the transmission signal based on the additional information of the transmission signal, a plurality of decompressors for decompressing each image data separated by the demultiplexer, and a decompressor by the decompressors. It is characterized by comprising a multiplexer for forming original image data from each expanded image data.

[0006]

According to the present invention, images (for example, moving images) are displayed at low speed.
The compression / expansion processing of is performed.

[0007]

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

FIG. 1 shows a block diagram of an encoder to which the present invention is applied. In this example, four sets of compressors are used. 1 is a demultiplexer, which is an A / D converter 2
And a control unit 3, and the original image data is A / D converter 2
Is converted from an analog signal to a digital signal by the control unit 3 and assigned to the four compressors 4A to 4D.
The allocation here is controlled based on the synchronization signal (SYNC) in the original image data input to the control unit 3. Specific examples are shown in FIGS. 3 and 4 (FIG. 3 shows screen division at the time of interlacing, and FIG. 4 shows screen division at the time of non-interlacing. In each case, four compressors / expanders (described later) are used. ). Timing control of sending of image data to each compressor is performed between each compressor and the control unit 3 based on a status control signal (between the control unit 6 (described later) and each compressor). Is also the same). After the screen is divided by the demultiplexer 1, each image data is appropriately compressed by each of the compressors 4A to 4D. The compressed image data are input to the multiplexer 5, aligned by the control unit 6 on the same signal line, added with additional information, converted into a serial signal by the P / S converter 7, and transmitted. Although serialized here, it may be parallel. The additional signal is used to determine the output of each compressor (header information) and is necessary for the decoding side to perform accurate decoding. It is created based on the information given and received in.

FIG. 2 shows a block diagram of a decoder to which the present invention is applied. In this example, four expanders are used according to the encoder unit. The signal transmitted from the encoder unit is parallelized by the S / P converter 9 in the demultiplexer 8, and the additional information contained therein is input to the control unit 10, and based on this, the control unit 10
Removes additional information from the transmission signal (assumes NUL data)
After that, the same No. as the compressor was used. The image data is separated into the expanders 11A to 11D. Timing control of sending of each separated image data to the decompressor is performed based on a status control signal between each decompressor and the control unit 10 (control unit 13 (also the same with 9 described later). The individual image data decoded by each decompressor is input to the multiplexer 12 and restored to the original continuous image again by the control unit 13, and the D / A converter 1
Analogized by 4. Further, a synchronization signal (SYNC) is generated from the control unit 13 based on the information exchanged between the control units 10 and 13.

[0010]

As described above, according to the present invention, it is possible to perform compression / expansion of a high-quality image by signal processing at a lower speed than in the prior art. Further, since the amount of information is reduced, transmission or storage cost can be reduced, and transmission within a limited transmission band becomes possible.

[Brief description of drawings]

FIG. 1 is a block diagram of an encoder to which the present invention is applied.

FIG. 2 is a block diagram of a decoder to which the present invention is applied.

FIG. 3 is a diagram showing an example of screen division.

FIG. 4 is a diagram showing another example of screen division.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Demultiplexer 2 A / D (analog-digital) converter 3 Control part 4A-4D Compressor 5 Multiplexer 6 Control part 7 P / S (parallel-serial) converter

Claims (2)

[Claims] 1. A demultiplexer for dividing original image data into a plurality of image data, a plurality of compressors for compressing each image data divided by the demultiplexer, and each compressed image compressed by each compressor. An image information transmitting apparatus, comprising: a multiplexer for adding data to additional information and mixing the same on a same signal line and outputting the mixed signal. 2. A demultiplexer for separating a plurality of image data from the transmission signal based on additional information in the transmission signal from the image information transmission device according to claim 1, and each image data separated by the demultiplexer. An image information transmission device comprising: a plurality of decompressors for decompressing the image data, and a multiplexer for forming original image data from the decompressed image data decompressed by the decompressors.