Decoding method and image insertion method for station caption subtitle insertion system

A decoding method and technology for inserting a system, which are applied in the field of station logo subtitle inserting systems, can solve the problems of increased processing time and increased computational complexity of video frame decoding, and achieve the effects of reducing computational complexity and shortening processing time.

Inactive Publication Date: 2012-07-25
SUMAVISION TECH CO LTD
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Problems solved by technology

[0004] In the existing TS (Transfer Stream, Transport Stream) streaming subtitle insertion system using local decoding and re-encoding methods, the range of the local decoding area is constant. In order to ensure the decoding quality, it is usually set to a large value, which means that more decoding slices need to be processed, resulting in increased computational complexity and increased processing time for video frame decoding

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  • Decoding method and image insertion method for station caption subtitle insertion system
  • Decoding method and image insertion method for station caption subtitle insertion system
  • Decoding method and image insertion method for station caption subtitle insertion system

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Embodiment Construction

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0028] Such as figure 1 As shown, in the subtitle insertion system using local decoding and re-encoding architecture, the video frame is usually divided into three areas: the insertion area 100, the relevant area 200 and the irrelevant area 300. The insertion area 100 is the inserted station logo or subtitle, etc. The video image area covered by the image. The related area 200 is an area composed of macroblocks that have a direct or indirect mutual reference relationship with the macroblocks in the insertion area. The irrelevant area 300 is the remaining area of ​​the video image of the display. The slices included in the first two areas are decoding slices, and the macroblocks of the decoding slices need to be decoded when inserting logos and subtitles. Therefore, the insertion area 100 and the related area 200 are collectively re...

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Abstract

The invention provides a decoding method and an image insertion method for a station caption subtitle insertion system. The decoding method comprises the following steps of: setting a decoding parameter for a decoding region of a video frame to be decoded in a video sequence frame; judging the frame type of the video frame to be decoded; and adjusting the decoding range of the decoding region of the video frame to be decoded according to the decoding parameter, the frame type and the motion complexity of a plurality of decoded video frames in the video sequence frame in front of the video frame to be decoded and decoding the decoding region of the video frame to be decoded according to the adjusted decoding range. In the decoding method, the decoding range of the decoding region of the video frame is adjusted in a self-adaptive mode, so that the decoding computational complexity of the decoding region of the video frame is reduced and the decoding time is shortened. Since the image insertion method adopts the decoding method in a video frame decoding step, the computational complexity of image insertion is reduced and the processing time is shortened.

Description

technical field [0001] The invention relates to the field of a station logo subtitle insertion system, in particular to a decoding method and an image insertion method for the station logo subtitle insertion system. Background technique [0002] With the popularization of digital video services and the determination of the general trend of triple play, the transcoding requirements between digital videos and various application requirements in the transcoding framework are increasing day by day. Video transcoding involves video decoding and re-encoding technology, which is the focus and difficulty in the field of video coding and decoding. [0003] In the subtitle insertion system using local decoding and re-encoding architecture, there are generally two types of slices in video frames: decoding slices and bypass slices. The bypass strip does not perform decoding processing, and directly copies the strip from the input video stream to the output buffer, and the processing co...

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04N21/2343H04N21/236H04N21/4402
Inventor崔玉斌
OwnerSUMAVISION TECH CO LTD