Method, system and apparatus for adjusting video quality grade

A technology of video quality and video capture device, applied in the advanced field, can solve the problems of wasted bandwidth, waste of client CPU and memory resources, unable to be effectively processed, etc., so as to improve video quality, improve performance and save network bandwidth. Effect

Active Publication Date: 2009-11-25
ZHEJIANG UNIVIEW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the existing technology, the encoder can only transmit the video stream to the client according to the preset fixed bit rate. Usually the video stream bit rate determines the video quality, that is to say, the encoder is transmitting the video stream to the client. The video quality does not change during the process, which may cause defects such as the following: For some video streams that do not require too high video quality, such as video streams whose images do not change for a long time, they also use the same method as other video streams. Streaming at the same bit rate will obviously cause a waste of bandwidth, as well as a waste of client CPU and memory resources.
When the CPU and memory resources occupied by the total video stream received by the client exceed the limit, they cannot be processed effectively, which affects the performance of the client.

Method used

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  • Method, system and apparatus for adjusting video quality grade
  • Method, system and apparatus for adjusting video quality grade
  • Method, system and apparatus for adjusting video quality grade

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Embodiment 1. The detection of the monitoring front end triggers the client to initiate a video quality level for a certain monitoring front end.

[0047] The monitoring front-end can trigger the adjustment of the video quality level through motion detection alarm or anti-theft alarm. In this embodiment, motion detection is taken as an example for description. Figure 4 The flow chart of the method provided by Embodiment 1 of the present invention should be noted that the client A and camera A in this embodiment are just pronouns, which may be any client and camera in the video surveillance network. Such as Figure 4 As shown, the method may include the following steps:

[0048] Step 401: When the client A determines whether the motion vector of the video stream corresponding to the camera A exceeds the preset motion vector threshold, it judges whether the client A has a monitoring relationship with the camera A, and if so, sends information about carrying the camera A...

Embodiment 2

[0080] Embodiment 2: The adjustment of the video quality level is triggered by detecting that the resource occupied by the video stream locally received by the client exceeds the limit.

[0081] Figure 5 The flow chart of the method provided by Embodiment 2 of the present invention, such as Figure 5 As shown, the method may include the following steps:

[0082] Step 501: Client A determines that the bandwidth occupied by the locally received video stream exceeds the preset first bandwidth threshold, or the occupied CPU resources exceed the preset first CPU resource threshold, or the occupied When the memory resource exceeds the preset first memory resource threshold, a video adjustment request is sent to the management server, and the video adjustment request carries information about cameras that have a monitoring relationship with the client A.

[0083] In this step, the client determines that the resource occupied by the locally received video stream exceeds the preset ...

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Abstract

The present invention provides a method, system and apparatus for adjusting video quality grade, when the video adjustment triggering event is generated, the client end transmits the video adjustment request to a management server; the management server determines the video adjusting scheme and transmits the configuring message carrying with the video adjusting scheme information to the encoder referred to the video adjusting scheme according to the video collecting device information carried in the video adjustment request; after the encoder receives the configuring message, the video quality grade of the video stream transmitted to the client end can be adjusted according to the video adjusting scheme. The invention can adjust the video quality dynamically during video stream transmission, can be adapted to the using requirement to economize resource or improve the using performance of the client end.

Description

technical field [0001] The invention relates to the technical field of multimedia communication, in particular to a method, system and device for adjusting video quality levels. Background technique [0002] With the development of audio and video codec technology and network technology, the image data of the camera is digitized and transmitted or stored on the network to form a digital video surveillance technology. The video surveillance system is mainly composed of a video acquisition device, an encoder, a management server and a decoder. Among them, the video acquisition device and the encoder are the monitoring front end. Usually, the video acquisition device can be a camera, and the decoder can be a client with decoding and playback functions. end, such as figure 1 shown. [0003] The realization process of real-time video surveillance can be as follows: figure 2 As shown, it mainly includes the following steps: [0004] Step 201: the client applies to the managem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24H04N7/18
Inventor 林鹏程周迪
Owner ZHEJIANG UNIVIEW TECH CO LTD
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