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Video decoder

A decoding device and video technology, applied in the field of video decoding devices, can solve the problems of affecting the decoding effect of video data, low decoding efficiency, error concealment, etc.

Inactive Publication Date: 2013-06-12
ACER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the existing video decoding device performs error checking, error concealment, and decoding procedures on the video data in the same circuit functional unit, it cannot process multiple pictures (PICTURE) at the same time, resulting in low decoding efficiency.
[0003] In addition, if an error occurs in a single circuit functional unit in the existing video decoding device during the process of performing error checking, error concealment and video decoding, it will often affect the decoding effect of subsequent video data, and even worse. Otherwise, it will cause the crash of the video decoding device
On the other hand, the single circuit functional unit of the existing decoding device needs to have many functional items, so the complexity of the circuit design and the flexibility of the circuit function change are also limited by a considerable program.

Method used

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Embodiment Construction

[0015] figure 1 It shows the composition hierarchy of the existing image data, wherein the format of the image data is the MPEG4 compression standard. As shown in the figure, MPEG4 defines several layers of different video coding layers, including: VISUAL OBJECT SEQUENCE (VOS for short), including all video objects that can form a complete video picture. Next is the video object (VISUALOBJECT, referred to as VO), which represents one of the objects in a picture. Under the video object is a visual object layer (VISUAL OBJECT LAYER, referred to as VOL), which is used to determine whether to implement a scalable (SCALABLE) coding mode or a non-scalable (NON-SCALABLE) coding mode for the video object. The aforementioned video object sequence, video object, and coded data included in the video object layer are applied to all image data in the video data in the coding layer of MPEG4. Below the video object layer is a visual object plane (VISUAL OBJECTPLANE, referred to as VOP), wh...

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Abstract

The invention discloses a video decoder, which comprises an error checking unit and a decoding unit, wherein the error checking unit checks an error state in video data and generates error information; then the decoding unit selectively executes an error concealing program and a decoding program on the video signal according to the error information. The video decoder can execute error checking, error concealing and video decoding program on the video data.

Description

technical field [0001] The present invention relates to a video decoding device, in particular to a video decoding device with an error checking unit to provide error information to assist in decoding video data. Background technique [0002] The existing video decoding device implements the video data error checking, error concealment and video decoding program in a single circuit functional unit. However, because the existing video decoding device sequentially performs error checking, error concealment and decoding on the video data in the same circuit functional unit, it cannot process multiple pictures (PICTURE) at the same time, resulting in low decoding efficiency. [0003] In addition, if an error occurs in a single circuit functional unit in the existing video decoding device during the process of performing error checking, error concealment and video decoding, it will often affect the decoding effect of subsequent video data, and even worse. Otherwise, it will caus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N7/68H04N19/44H04N19/895
Inventor 郑帆捷黄士嘉郭斯彦
Owner ACER INC