Online video transcoding method based on H.264 standard

A video transcoding, standard technology, applied in the field of online video transcoding based on the H.264 standard, can solve the problems of unsatisfactory viewing experience, low quality, low efficiency, etc., achieve fast and accurate processing, and accelerate transcoding speed, image quality enhancement effects

Inactive Publication Date: 2015-01-28
SHANDONG UNIV OF FINANCE & ECONOMICS
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

such as attached figure 2 In the above-mentioned video-on-demand network, a video transcoding module is added to the video server, and the user can complete the video-on-demand by connecting the receiving terminal to a wireless or wired network. However, the current transcoding efficiency is low and the quality is not high, which cannot satisfy Smooth, real-time viewing experience

Method used

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  • Online video transcoding method based on H.264 standard
  • Online video transcoding method based on H.264 standard
  • Online video transcoding method based on H.264 standard

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Embodiment Construction

[0041] In order to facilitate understanding and implementation of the present invention, the present invention will be further described in detail below in conjunction with an example of wireless video-on-demand.

[0042] In wireless video on demand, encoded video streams are stored on the video server, and these video streams are compressed under the premise of high bit rate, that is, large image size, high frame rate, and good image quality.

[0043] When a user requests a certain video segment, the corresponding required parameters will be sent to the video server at the same time, these parameters include: image size, frame rate, bit rate, etc. The video server starts the transcoding module according to the requirements of these parameters, transcodes the encoded video stream into the required format, and sends the transcoded video stream to the user terminal in real time.

[0044] Spatial resolution transcoding is image size transcoding, transcoding from a larger size ima...

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Abstract

The invention provides an online video transcoding method based on the H.264 standard. The method includes the following steps that S1, online decoding is conducted; S2, the image size is reduced; S3, macro-block types and corresponding modes are selected; S4, motion vectors are recalculated; S5, the recalculated motion vectors are refined; S6, recoding is conducted. The method is suitable for the fields of wireless video monitoring, internet video monitoring, video-on-demand and the like, the transcoding speed can be remarkably increased, the recoded image quality is guaranteed, and the requirement for instantaneity is met.

Description

technical field [0001] The invention belongs to the field of multimedia signal processing, in particular to an online video transcoding method based on the H.264 standard that can be applied to online video on demand. Background technique [0002] In video-on-demand applications, different users have huge differences in usage environments, such as network bandwidth, processor performance, and display performance. In order to provide various users with rich video resources, video content providers need to save video resources in various formats, such as high definition and standard definition. In order to resolve differences caused by different user terminals, video transcoding technology may be used. This technology adjusts the image size, frame rate, image quality and other parameters in the video stream in real time, so as to meet the requirements of access network and playback terminal. such as attached figure 2 In the above-mentioned video-on-demand network, a video t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/2343H04N21/4402
CPCH04N21/234309
Inventor 刘兆广纪秀花徐新艳
Owner SHANDONG UNIV OF FINANCE & ECONOMICS
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