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Orthogonal transformation method for image and video compression

A technology of video compression and orthogonal transformation, applied in the information field

Inactive Publication Date: 2006-12-13
王国秋
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  • Abstract
  • Description
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Problems solved by technology

Therefore, for more than 30 years, the whole world has been studying the question of whether there is a better transformation in image and video compression, and has not obtained a positive answer

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  • Orthogonal transformation method for image and video compression
  • Orthogonal transformation method for image and video compression
  • Orthogonal transformation method for image and video compression

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Embodiment Construction

[0028] In image and video compression, image compression is the most core foundation, and orthogonal transformation method is the most core technology in image and video compression technology. In the image compression standard JPEG (International Standard ISO / ICE IS 10918) and the video compression standard MPEG-1 (International Standard ISO / ICE 11172), MPEG-2 (International Standard ISO / ICE 13818) and MPEG-4 (International Standard ISO / In ICE 14496), at present, the orthogonal transform method used is 8×8 Discrete Cosine Transform (DCT, namely Discrete Cosine Transform).

[0029] The present invention designs an 8×8 orthogonal transform, which is completely different from the 8×8 discrete cosine transform DCT, and has better compression performance than DCT.

[0030] The present invention will be described in detail below.

[0031] (1) The orthogonal transformation matrix of the present invention is represented by D, namely

[0032] D = ...

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Abstract

The invention relates to an orthogonal transformation used in image and video compression. Wherein, it first divides the image into 8*8 blocks as M, then uses 8*8 orthogonal transformation matrix D to process two-dimension transformation on each image block M, to obtain the transformation factor matrix N, then quantizes and codes each factor of N, to complete the image and video compression. The invention is based on orthogonal wavelet theory at octonary, to design one new 8*8 orthogonal transformation matrix, to compress image and video, to obtain better compression effect than the discrete cosine transformation, and improve the economic property and efficiency on the softwater and integrated circuit.

Description

【Technical Field】 [0001] The present invention relates to the field of information technology, in particular to a method for digital image and digital video compression coding conversion. 【Background technique】 [0002] With the rapid development of technologies such as computers, microelectronics, information processing, communications, and lasers, multimedia technologies that integrate graphics, text, sound, and images have rapidly penetrated into the computer, communications, radio and television, and consumer entertainment industries. In the field, more and more digital devices that transmit digital signals are used. Digital signal has many advantages, but when the analog signal is digitized, its frequency band will be greatly widened. For example, after a 6MHz ordinary TV signal is digitized, its digital rate will be as high as 167Mbps, which requires a lot of storage capacity and transmission bandwidth, which makes The digital signal loses its practical value. Digital compr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N19/124H04N19/126H04N19/129H04N19/13H04N19/60H04N19/625H04N19/63
Inventor 王国秋呼金明黄坚陈宝民
Owner 王国秋
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