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Video reproduction system

A video and video streaming technology, applied in transmission systems, image communication, selective content distribution, etc., can solve the problems of objective monitoring and analysis of quality information that cannot be said to be sufficient, and achieve the effect of easy analysis

Inactive Publication Date: 2013-02-27
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, objective monitoring and analysis based only on the collection of quality information is not sufficient, and Patent Document 2 discloses a technique for reproducing, on the management system side, degraded video played on the user side.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0040] figure 1 It is a diagram showing the configuration of the video playback system according to Embodiment 1 of the present invention.

[0041] The video playback system includes video distribution server 1 , video storage 2 , external network 3 , home gateway device 4 , home network (indoor network) 5 , video receiving terminal 6 , television 7 , quality control system 8 , and video display terminal 9 . The home gateway device 4, the video receiving terminal 6, and the television 7 are arranged in the user's room.

[0042] The video distribution server 1 distributes the video stream acquired from the video storage 2 to the home gateway device 4 via the external network 3 . In addition, the original video stream stored in the video memory 2 is output to the quality control system 8 . The image is packetized by RTP (Real-Time Transport Protocol, Real-time Transport Protocol), and the transmission protocol uses UDP (User Datagram Protocol, User Datagram Protocol) for distr...

Embodiment approach 2

[0111] Figure 19 It is a diagram showing the configuration of a video playback system according to Embodiment 2 of the present invention. Such as Figure 19 As shown, in this Embodiment 2, the quality information memory 10 and the test image memory (image memory) 11 are additionally installed in the image reproduction system, and the quality control system 8 accesses these quality information memory 10 and the test image memory 11. This is the same as Embodiment 1 described above is different. Since other configurations are the same as those of the image reproduction system in Embodiment 1, the notation and figure 1 The symbols used in the same symbols are omitted or abbreviated. Furthermore, in Embodiment 1, playback of a degraded video for the video currently viewed by the user is described, but in this Embodiment 2, playback of a degraded video using an arbitrary video is described.

[0112]The quality management system 8 accumulates the first and second quality inform...

Embodiment approach 3

[0120] Figure 21 It is a diagram showing the configuration of a video playback system according to Embodiment 3 of the present invention. In this third embodiment, a relay device 12 is provided instead of the home gateway device 4 shown in the first embodiment. The relay device 12 performs the same operations as the home gateway device 4 . Since other configurations are the same as those of the image reproduction system in Embodiment 1, the notation and figure 1 The symbols used in the same symbols are omitted or abbreviated. In addition, the configuration of the third embodiment can also be applied to the second embodiment.

[0121] The relay device 12 is arranged in the external network 3 and exists in the video distribution route from the video distribution server 1 to the video receiving terminal 6 . Like the home gateway device 4 , the relay device 12 generates the second quality information using the quality control information received from the video receiving term...

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PUM

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Abstract

The disclosed video reproduction system is provided with: a video reception terminal (6) that generates first quality information, and quality control information based thereon, for reproducing a degraded video played on a user side from a video stream distributed via an external network (3) and a home network (5); a home gateway device (4) that, on the basis of the quality control information, generates second quality information for reproducing a virtual degraded video from which the effects of quality degradation due to the home network (5) are removed; and a quality management system (8). The quality management system (8): uses the first quality information along with an original video stream, from before distribution via the external network (3), to reproduce the degraded video played on the user side; and uses the original video stream along with the second quality information to reproduce the virtual degraded video.

Description

technical field [0001] The present invention relates to a system for reproducing degraded video when a degraded video is provided on a user side in a service of video communication in real time. Background technique [0002] In recent years, real-time video communication services such as video distribution over IP networks have become popular. However, since the IP network is a best-effort network, the quality of network transmission cannot be guaranteed, so packet forwarding delays and losses may occur. Furthermore, packet discarding due to buffer overflow or the like also occurs in the video receiving terminal. Therefore, in order to provide video communication services in real time, technology is required to monitor and analyze the quality of video viewed by each user, that is, the quality of video perceived by the user. [0003] As a technique for monitoring and analyzing video quality, Patent Document 1 discloses that in a quality monitoring and analysis system connec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/4363H04L29/06
CPCH04L29/06503H04N21/4363H04L29/06238H04N21/436H04L29/06523H04L65/605H04L65/80H04L65/1026H04N21/254H04N21/44209H04N21/6377H04N21/6437H04L65/765H04L65/752
Inventor 本田裕
Owner MITSUBISHI ELECTRIC CORP