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Fault disguising method for dynamic image decoding by using multi-frame buffer

A dynamic image and frame buffer technology, applied in the field of error concealment, can solve problems such as poor image quality of the receiver, achieve the effect of improving image quality and preventing errors from spreading

Inactive Publication Date: 2007-03-14
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0021] If this error propagation phenomenon occurs, the image quality of the recipient will be quite poor

Method used

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  • Fault disguising method for dynamic image decoding by using multi-frame buffer
  • Fault disguising method for dynamic image decoding by using multi-frame buffer
  • Fault disguising method for dynamic image decoding by using multi-frame buffer

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Embodiment Construction

[0042] Hereinafter, preferred embodiments according to the present invention will be described in more detail with reference to the accompanying drawings.

[0043] FIG. 4 is a sequence diagram illustrating an error concealment method when decoding a moving image using a multi-screen buffer according to the present invention. FIG. 5 is a schematic diagram illustrating the overcoming of the error propagation phenomenon according to the present invention.

[0044] However, here, only the process of correcting the motion (error concealment process) in the process of MPEG-4 decoding of data transmitted from the encoder has been described.

[0045] That is to say, here, the following situation is described, that is, in the process of decoding the currently input image frame (n_frame), for the correction of the moving action of the Inter macro block (macro block), when When referring to a module where an error occurred in the previous frame (n-1_frame), it is the process of performi...

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Abstract

This invention relates to error hiding method by use of multiple buffer in dynamic image process, which comprises the following steps: correcting hiding module on above image modules; referring above mobile correction before image macro module whether there is error; according to above results, under situation of error before, through above macro module mobile vector values to compute; using above formula to read out reference macro module from front images; then using above macro module to move and correct current image.

Description

【Technical field】 [0001] The present invention relates to an error concealment method when decoding dynamic images using multi-picture buffers. Specifically, it relates to an error concealment method when decoding MPEG-4 (Motion Picture Experts Group-4) moving pictures. Utilize the error concealment method when MPEG-4 (Motion Picture Experts Group-4) dynamic image decoding according to the present invention, when passing through the MPEG-4 (Motion Picture Experts Group-4) bit stream information of line network to transmit , it can effectively prevent the image quality degradation caused by network errors when decoding MPEG-4 (Motion Picture Experts Group-4). 【Background technique】 [0002] For a system that compresses digital multimedia data and then transmits or encodes it, for example, in the case of H.263 or MPEG4, when compressing and encoding a moving image, the data of the digital image is converted into Processing is performed in units of modules (macro blocks). Wh...

Claims

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Application Information

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IPC IPC(8): H04N7/68H04N19/895
Inventor 郑仁泓郑永安韩承熹
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI