Unlock instant, AI-driven research and patent intelligence for your innovation.

Methods and apparatuses for temporal synchronisation between the video bit stream and the output video sequence

A technology of video sequence and time synchronization, applied in the direction of digital video signal modification, television, electrical components, etc., can solve problems such as inability to apply

Active Publication Date: 2013-04-03
DEUTSCHE TELEKOM AG
View PDF6 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the above methods need to extract parameters from the bitstream for synchronization, and thus cannot be applied in the case of encrypted bitstreams

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Methods and apparatuses for temporal synchronisation between the video bit stream and the output video sequence
  • Methods and apparatuses for temporal synchronisation between the video bit stream and the output video sequence
  • Methods and apparatuses for temporal synchronisation between the video bit stream and the output video sequence

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0186] a long array of frame sizes

[0187]After the initial I-frame of the current GoP is encountered, the frame sizes of all subsequent frames are stored in elements of an array with an index equal to the number of frames following said I-frame. It is preferably done before the detection of the next I-frame notifying the end of the first GoP to be analyzed. The array of frame dimensions thus constructed is input to a pattern matching process which compares this array to the set of typical patterns and outputs estimated GoP patterns and other applicable data.

[0188] If the bitstream being analyzed is not encrypted, and thus the frame type is known to the algorithm, then the actual frame size can be replaced by a normalized value, e.g. '1' for non-reference B-frames, '2' for reference B-frames And '4' is used for P frames, which serve the same purpose as the actual frame size, but do not introduce any statistical uncertainty.

[0189] pattern matching

[0190] In an embod...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to methods and apparatuses for temporally synchronising the input bit stream of a video decoder with the processed video sequence decoded by the video decoder.

Description

technical field [0001] The present invention relates to a method and a device for synchronizing an input video bitstream of a video decoder with a processed video sequence decoded by the video decoder. Background technique [0002] The proliferation of video communication applications in the last few years has necessitated the development of robust video quality measurements to evaluate Quality of Experience (QoE) defined by user-perceived quality of service. Video quality assessment is an important aspect for content providers to efficiently design, plan and monitor services. [0003] Today, hybrid video quality assessment models / systems use a combination of packet information, bitstream information, and decoded reconstructed images. Typically, in a hybrid video quality assessment algorithm, features extracted or calculated from the bitstream (e.g., motion vectors, macroblock types, transform coefficients, quantization parameters, etc.) rate, packet loss, latency, etc.) a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/00
CPCH04N21/242H04N17/004H04N21/4307H04N21/4302H04N21/44004H04N19/44H04N21/43072H04N17/02H04N17/04H04N17/045H04N17/06H04N2017/006H04N2017/008
Inventor 萨瓦斯·阿伊罗普洛斯伯恩哈德·费坦恩玛丽-内日·加西亚彼得·利斯特亚历山大·拉克
Owner DEUTSCHE TELEKOM AG