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Video predictive coding apparatus and method

a predictive coding and video technology, applied in the field of video encoding system predictive coding apparatus and methods, can solve the problems of greatly affecting the performance of the encoder, and achieve the effect of improving coding efficiency

Inactive Publication Date: 2007-04-19
PANTECH & CURITEL COMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0017] To solve the above problem, it is an object of the present invention to provide a predictive coding method, which can enhance the coding efficiency by predictively coding DC coefficients of a block to be coded using DC gradients of a plurality of previously coded neighboring blocks.
[0018] It is another object of the present invention to provide a predictive encoder, which can enhance the coding efficiency by predictively coding DC coefficients of a block to be coded using DC gradients of a plurality of previously coded neighboring blocks.

Problems solved by technology

Thus, the performance of an encoder is greatly affected by efficiently coding the data generated during the texture coding.

Method used

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Embodiment Construction

[0039] In MPEG-4, which is under normalizing work, VOP (video Object Plane) based video signal coding methods, including the conventional block-oriented coding method, are currently investigated. The development of MPEG-4 is initiated by the necessity of supporting next-generation video and audio applications, which cannot be supported by the conventional standards.

[0040] The MPEG-4 provides novel methods for communicating, accessing and manipulating video and audio data, e.g., an object-oriented interactive function and connection through networks having different features. Also, the MPEG-4 provides useful operating characteristics under a communication environment where error are liably generated or a low-transmission rate environment. Further, natural video and audio, and artificial video and audio can be altogether coded and manipulated by integrating computer graphics technology.

[0041] Briefly, the MPEG-4 must support all functions required and expected by various application...

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Abstract

A predictive coding in a video coding system, which can enhance the coding efficiency by predictively coding DC coefficients of a block to be coded using DC gradients of a plurality of previously coded neighboring blocks. The predictive coefficient is selected according to the difference between the quantized DC gradients (coefficients) of a plurality of neighboring blocks of the block to be coded, and the DC coefficient of the block to be coded is predictively coded by the selected predictive coefficient, thereby enhancing the coding efficiency.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a continuation application of application Ser. No. 09 / 691,413, filed on Oct. 18, 2000, which is a continuation application of application Ser. No. 08 / 940,937, filed on Sep. 30, 1997, which claims priority to and the benefit of Korean Patent Application No. 96-42882 filed on Sep. 30, 1996, all of which are hereby incorporated by reference for all purposes as if fully set forth herein.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to predictive coding for a video encoding system, and more particularly, to a video predictive coding apparatus and method thereof, which can enhance the coding efficiency by predictively coding DC coefficients of a block to be coded using DC gradients of a plurality of previously coded neighboring blocks. [0004] 2. Description of the Related Art [0005] In general, in conventional standards for video data compression such as MPEG-1, MPEG-2, J...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G06K9/36G06T9/00H04N7/24H04N19/105H04N19/134H04N19/136H04N19/14H04N19/176H04N19/186H04N19/196H04N19/20H04N19/21H04N19/423H04N19/46H04N19/50H04N19/51H04N19/563H04N19/59H04N19/60H04N19/61H04N19/625H04N19/70
CPCH04N19/593H04N19/60H04N19/50H04N19/625H04N19/129H04N19/176H04N19/186H04N19/124
Inventor LEE, SANG-HEEKIM, JAE-KYOONPARK, CHEL-SOOMOON, JOO-HEE
Owner PANTECH & CURITEL COMM INC
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