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Kinetic image coding method and device with fixed complexity count

By calculating the motion estimation computational complexity deviation of video data and updating the DCT computational complexity, the problem of computational complexity changes of traditional video encoders is solved, and real-time moving image encoding is realized on a personal computer or multimedia processor.

Inactive Publication Date: 2006-07-05
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the threshold T is a fixed value over the range of the video sequence, the complexity in the DCT computation varies for each macroblock or frame
In particular, when a software video encoder is implemented with a PC or a multimedia processor, real-time encoding is not possible due to the computational complexity of the PC or multimedia processor if the computational complexity of the DCT varies with macroblocks or frames. sex is restricted

Method used

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Embodiment Construction

[0014] figure 2 is a block diagram of a video encoder structure according to the present invention. refer to figure 2 , the input video data consists of frames in units of 8×8 blocks.

[0015] The DCT unit 220 performs DCT processing on the input video data in 8×8 blocks, or processes the input video data without encoding in response to a DCT skip control signal generated by the DCT skip unit 290 . The quantizer (Q) 230 quantizes the video data on which the DCT process is performed by the DCT unit 220 . VLC unit 240 removes statistical redundancy in quantized video data. The inverse quantizer (IQ) 250 inverse quantizes the video data quantized by the Q230. The IDCT unit 260 performs IDCT processing on the video data dequantized by the IQ 250 . The FM unit 270 stores video data on which IDCT processing is performed by the IDCT unit 260 in units of frames. ME 280 uses the video data of the current frame and the video data of the previous frame stored in FM 270 to estimat...

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Abstract

The motion estimation (ME) computational complexity of the moving image data, is calculated. A target discrete cosine transform (DCT) complexity is updated, based on the difference between the calculated complexity and a target ME computational complexity. The DCT process on the image data, is performed or skipped, based on the updated DCT complexity. Independent claims are also included for the following: (1) moving image encoder; and (2) computer readable recorded medium storing moving image encoding program.

Description

Technical Field [0001] The present invention relates to a video coding system, and more particularly to a method and device for coding a moving image, wherein the coding adopts a fixed computational complexity and does not consider the characteristics of the moving image. Background Art [0002] Usually, moving images are encoded by hardware. However, the improvement of the performance of the central processing unit (CPU) of personal computers (PCs) and the development of high-performance multimedia processors have made it possible to encode moving images by software. Therefore, there is a need for encoding techniques that can effectively reduce the amount of calculation in order to compress and restore moving images in real time. For example, if the motion of a moving image is estimated by a video encoder according to the H.263 standard and an n-step search is adopted, the discrete cosine transform (DCT) / inverse discrete cosine transform (IDCT) module occupies 30% of the enco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/32H04N19/103H04N7/24H04N19/139H04N19/176H04N19/196H04N19/50H04N19/51H04N19/57H04N19/60H04N19/625
CPCH04N19/00781H04N7/504H04N7/26111H04N19/00278H04N7/26244H04N19/00357H04N19/00296H04N7/30H04N7/3044H04N7/2625H04N7/26271H04N19/00181H04N19/00775H04N7/26175H04N7/26127H04N7/50H04N19/00127H04N7/26319H04N19/00157H04N19/00266H04N19/132H04N19/14H04N19/149H04N19/172H04N19/176H04N19/18H04N19/192H04N19/60H04N19/61H04N19/156
Owner SAMSUNG ELECTRONICS CO LTD