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A hierarchical coding method for mobile video live broadcast

A technology of hierarchical coding and moving video, applied in the field of video coding, can solve the problems of high complexity and low efficiency, and achieve the effect of simple coding method, high coding efficiency and flexible hierarchical coding

Active Publication Date: 2019-03-29
西安元智系统技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The current hierarchical encoding methods include scalable encoding formed by the combination of quality, space, time, and frequency, and quality, space, time, and frequency. In addition, there is also fine-grained granularity. coding; however, these hierarchical coding methods generally have disadvantages such as high complexity and low efficiency

Method used

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  • A hierarchical coding method for mobile video live broadcast
  • A hierarchical coding method for mobile video live broadcast
  • A hierarchical coding method for mobile video live broadcast

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Embodiment 1

[0024] The hierarchical coding method described in the present invention can be used for mobile terminals that initiate live video broadcasts. With sufficient computing resources, software coding can be fully implemented.

[0025] In a specific implementation manner of the present invention, the video image is usually collected directly from the camera of the mobile terminal in real time. The final encoding quality is not only limited by physical parameters such as camera pixels and resolutions, but also limited by the number of stream levels selected during encoding. The more levels, the higher the encoding quality.

[0026] like figure 1 As shown, after the video image is obtained, 1 / 4 down-sampling is performed, and the obtained 4 1 / 4 pixel images are respectively placed in the upper left, upper right, lower right, and lower left positions, thereby forming a picture with the same size as the original video image same image. The image at the upper left position is set as ...

Embodiment 2

[0033] In Embodiment 2, the hierarchical encoding method of the present invention can also achieve the purpose of hierarchical encoding by connecting an external hardware encoder. This implementation manner is especially applicable to the situation where the computing resources of the mobile terminal are limited.

[0034] image 3 The functional block diagram of the external hardware encoder is given.

[0035] The hardware encoder includes: a transceiver unit 1, a downsampling unit 2, a series selection unit 3, a slice combination unit 4, and an encoding unit 5; the transceiver unit 1, a downsampling unit 2, a series selection unit 3, and a slice combination The ports of the unit 4 and the coding unit 5 are connected sequentially, and the other port of the coding unit 5 is connected with the transceiver unit 1 to form a loop.

[0036] The transceiver unit 1 is responsible for receiving video images collected or stored by the mobile terminal, and the video images are sent to ...

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Abstract

The invention relates to the technical field of video coding, and specifically relates to a scalable coding method for mobile video live broadcast. The method comprises the main steps of carrying out 1 / 4 downsampling on an image needing to be coded, placing the 1 / 4 pixel images obtained after the downsampling at upper left, upper right, lower right and lower left locations, and taking the image at the upper left location as a reference image; marking the four 1 / 4 images as four slices; selecting a corresponding data rate scale according to a practical bandwidth demand; carrying out independent coding on the four slices; and forming four scales of code rates and reserving scale information. According to the hierarchical coding method provided by the invention, the existing video coding structure and data rate are not changed; the relatively flexible hierarchical coding can be realized; the coding method is simple; and the coding efficiency is high.

Description

technical field [0001] The invention relates to the technical field of video coding, in particular to a hierarchical coding method for mobile video live broadcast. Background technique [0002] Digital video technology is widely used in communications, computers, radio and television, and other fields, bringing a series of applications such as conference TV, videophone, digital TV, and media storage, and has prompted the emergence of many video coding standards. ITU-T and ISO / IEC are two major organizations that formulate video coding standards. ITU-T standards include H.261, H.263, and H.264, which are mainly used in the field of real-time video communication, such as conference TV and mobile video live broadcast ; The MPEG series standards are formulated by ISO / IEC and are mainly used in video storage (DVD), broadcast TV, streaming media on the Internet or wireless networks, etc. The H.264 video coding standard is called a new generation video coding standard. [0003] J...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/132H04N19/146H04N19/174H04N19/80H04N21/2343H04N21/2662
CPCH04N19/132H04N19/146H04N19/174H04N19/80H04N21/2343H04N21/2662
Inventor 邓宏全定可宋涛杨继红
Owner 西安元智系统技术有限责任公司
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