Video coder

A video coding and coding technology, applied in the direction of digital video signal modification, code conversion, pulse modulation TV signal transmission, etc. The effect of preventing extreme deterioration of smoothness and preventing extreme deterioration of picture quality
CN1428939AInactive Publication Date: 2003-07-09PANASONIC CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PANASONIC CORP
Publication Date
2003-07-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

In order to enhance the picture quality of a detected area, the present invention provides a video coding apparatus. In the apparatus, a reliability indicative of the degree of coincidence of an area detected by an important area detecting section with a real important area is calculated, and a coding parameter calculating section calculates a coding parameter to be set to the detected area according to the reliability, thereby controlling the picture quality of the detected area. Consequently, a whole image has a coding bit amount which does not break the restrictions of a transmission bit rate, and a larger coding bit amount is assigned to the important area so that a picture quality thereof can be improved and a visibility can be enhanced. In addition, the picture quality is more enhanced if a probability that the detected area might be an important area is higher.
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Description

technical field

[0001] The invention relates to a video encoding device for encoding a video signal with a transmission bit rate limited according to encoding parameters. Background technique

[0002] In recent years, due to the development of communication technology and the improvement of infrastructure, video signals can be sent and received through transmission paths and stored in storage media. In general, video signals have a large amount of information. Therefore, in the case where a video signal is to be transmitted using a transmission path with a limited transmission bit rate or stored in a storage medium with a limited storage capacity, a method for compressing and encoding the video signal is indispensable. technology. As one of the methods for compressing and encoding video signals, a standard MPEG (Moving Picture Experts Group) has been proposed by ISO / IEC, which is a method for reducing redundancy by using the temporal correlation and spatial correlation of ...

Claims

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