Image compression system of dynamic adaptation compression parameter

A technology for compressing parameters and compression systems, which is applied in image communication, digital video signal modification, electrical components, etc., and can solve problems such as unsuitable for real-time compression and decompression, high hardware cost, etc.

Active Publication Date: 2016-02-10
FOCALTECH ELECTRONICS
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  • Claims
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Problems solved by technology

The hardware cost is too high and not suitable for real-time compression and decompression hardw...

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  • Image compression system of dynamic adaptation compression parameter
  • Image compression system of dynamic adaptation compression parameter
  • Image compression system of dynamic adaptation compression parameter

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Embodiment Construction

[0042] figure 1 It is a block diagram of an image compression system 100 for dynamically adapting compression parameters of the present invention, which encodes a plurality of pixels 192 in a frame 190 . The frame has a plurality of blocks 191 arranged in a matrix, and each block can be 16x16, 16x8, 8x16, 8x8, 8x4, 4x8, 4x4 pixels 192 arranged in a matrix. The image compression system 100 includes a temporary storage device 110 , a texture and history analysis device 120 , a prediction value difference device 130 , a bit rate control device 140 , a mapping device 150 , and an encoding device 160 .

[0043] The temporary storage device 110 is used to temporarily store the plurality of pixels 192 of the frame 190, the plurality of pixels 192 including a current encoded pixel (X), a plurality of historical decoded pixels, and a plurality of Uncoded pixels. Wherein, the decoded pixels of the plurality of histories include the decoded pixels (y1-y7) of the first to the seventh hi...

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Abstract

The present invention discloses an image compression system of a dynamic adaptation compression parameter. A pattern and history analysis device detects the content of decoded pixels of multiple histories or analyzes previous historical information, and thus a predictive value and a current history are generated. A predict-value difference device subtracts a current encoding pixel and the predictive value to generate a predict-value difference. A bit rate control device is adapted to a compression rate according to a final_bits and outputs a suggest_bits. A mapping device is connected to the pattern and history analysis device, the predict-value difference device, and the bit rate control device. According to the predict-value difference, the current historical information and the suggest_bit, an index is calculated and generated. The encoding device encodes the index to output a bit stream and the final_bits.

Description

technical field [0001] The invention relates to the technical field of image compression, in particular to an image compression system that dynamically adapts to compression parameters. Background technique [0002] With the rapid advancement of electronic technology and transmission technology, people have higher and higher requirements for the image quality they browse. Since the size of image data is generally very large, before using them, it is usually necessary to compress them first, and then transmit them on the network or store them in the hard disk. Image compression can not only save the memory space occupied by image data, but also speed up its transmission time, so image compression is a very popular research topic at present. [0003] In March 2003, ITU-T / ISO officially announced the H.264 video compression standard. Because of its excellent performance compared with previous standards, it is called a new generation of video coding standard. Specifically, com...

Claims

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Application Information

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IPC IPC(8): H04N19/503H04N19/182H04N19/146H04N19/124H04N19/176H04N19/105
Inventor 黄正斌黄雅臻
Owner FOCALTECH ELECTRONICS
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