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Encoding and decoding apparatus and method for reducing blocking phenomenon and computer-readable recording medium

A technology of encoding and media, applied in the field of encoding and decoding moving images, can solve the problem of inability to eliminate the phenomenon of blocking

Inactive Publication Date: 2006-11-29
SAMSUNG ELECTRONICS CO LTD
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Problems solved by technology

[0006] As mentioned above, traditional deblocking methods only rely on thresholds and cannot eliminate the blocking phenomenon that occurs during quantization performed to achieve the target bit rate

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  • Encoding and decoding apparatus and method for reducing blocking phenomenon and computer-readable recording medium
  • Encoding and decoding apparatus and method for reducing blocking phenomenon and computer-readable recording medium
  • Encoding and decoding apparatus and method for reducing blocking phenomenon and computer-readable recording medium

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Embodiment Construction

[0036] The present invention will be described below with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. However, the present invention may be embodied in many different forms and should not be construed as limiting the invention. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete and cover all concepts related to the invention to those of ordinary skill in the art.

[0037] figure 2 The block diagram of is showing an encoding device according to an exemplary embodiment of the present invention. see figure 2 , the encoding device includes a first encoding unit 210 , a reconstructed image generating unit 220 , a second encoding unit 230 , a first variable length coding (VLC) and output unit 240 and a second VLC unit 250 .

[0038] The first encoding unit 210 encodes an input image using a predetermined first quantization coefficient and outputs the first encoded data to ...

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Abstract

Provided is an encoding method capable of reducing a blocking phenomenon that occurs when moving-images are encoded and decoded. The method includes: performing a first encoding operation on an input image using a first quantization coefficient; generating a reconstructed image of the encoded image; calculating a difference between corresponding partial images of the reconstructed image and the input image; and performing a second encoding operation on the calculated difference using a second quantization coefficient smaller than the first quantization coefficient. Using the second encoded difference, a decoding unit can reconstruct an image of a block boundary portion more elaborately with a small number of bits, thereby significantly reducing the blocking phenomenon in the decoding operation.

Description

technical field [0001] The apparatus and method of the present invention relate to encoding and decoding of moving pictures, and in particular, to a moving picture encoding and decoding apparatus and method capable of reducing blocking phenomenon. Background technique [0002] All moving picture codecs such as MPEG2, MPEG4, H.264 and VC1 suffer from blocking phenomena as a result of processing and quantization on a block basis. To solve this problem, the H.264 and VC1 codecs use loop filters. However, since the loop filter cannot completely eliminate the blocking phenomenon, post-processing such as deblocking or de-ringing is required for the decoder. [0003] figure 1 The view of is used to explain the algorithm of deblocking, which is a post-processing algorithm introduced in the MPEG4 standard. The deblocking algorithm includes two modes that can be applied according to the characteristics of boundary pixels, namely, DC offset mode and default mode. The DC offset mode...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/30
CPCH04N19/00096H04N19/00781H04N19/00448H04N19/00321H04N7/26351H04N19/00909H04N19/0026H04N19/00363H04N19/00127H04N19/00278H04N19/00157H04N19/0023H04N19/124H04N19/154H04N19/167H04N19/17H04N19/176H04N19/187H04N19/194H04N19/36H04N19/86
Inventor 宋秉哲
Owner SAMSUNG ELECTRONICS CO LTD
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