Discrete cosine transform process method and its device

A discrete cosine transform and discrete cosine technology, applied in the field of communication, can solve the problems of time-consuming, slow, and system resource consumption of multiplication operations, and achieve the effect of accelerating the transformation processing speed and reducing excessive consumption

Inactive Publication Date: 2007-10-03
HUAWEI TECH CO LTD
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Problems solved by technology

Since the conventional DCT algorithm and IDCT algorithm both use more multiplication and addition operations, it is well known that the multiplication operation consumes a lot of system resources during the operation process, such as the

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  • Discrete cosine transform process method and its device
  • Discrete cosine transform process method and its device
  • Discrete cosine transform process method and its device

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The technical scheme of the present invention analyzes the calculation principles of the DCT-II fast algorithm and the DCT-III fast algorithm in the prior art, and proposes that the multiplication operation needs to be done in the DCT-II fast transformation process and the DCT-III fast transformation process. Part of the process is replaced by fixed-point shift and positioning accumulation, so that the entire DCT-II fast transformation process and DCT-III fast transformation process avoid multiplication operations, thus realizing the accuracy of the DCT transformation result. The transformation speed of DCT is improved, and the excessive consumption of system software and hardware resources is reduced, so as to better meet the needs of modern communication services.

Among them, in the specific application process in the communication field, DCT-II fast transformation and DCT-III fast transformation are often mutually inverse processing processes. DCT transform processing, and ...

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Abstract

The present invention discloses a discrete cosine transform processing method. Said processing method is characterized by providing a special-purpose calculation formula and its operation method. Besides, said invention also provides a discrete cosine transform processing device. It can raise processing speed and can meet the requirements for modern communication service.

Description

technical field The present invention relates to a discrete cosine transform (DCT, Discrete Cosine Transform) technology and an inverse discrete cosine transform (IDCT, Inverse Discrete Cosine Transform) technology in the communication field, in particular to a discrete cosine transform processing method and device thereof. Background technique Since Ahmed and Rao proposed the definition of discrete cosine transform (DCT, Discrete Cosine Transform) in 1974, discrete cosine transform and inverse discrete cosine transform (IDCT, Inverse Discrete Cosine Transform) have become widely used in signal processing, Image processing, especially an important technology for speech compression and image compression codec processing, so DCT technology and IDCT technology have always been research hotspots in international academic circles and high-tech industries. Due to the requirement of real-time communication characteristics, in the Still Picture Experts Group (JPEG, Joint Picture E...

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Application Information

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IPC IPC(8): G06T9/00
Inventor 刘建国汪国有戴声奎叶登攀祝平平孟新建郑建铧
Owner HUAWEI TECH CO LTD
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