Method and device for modifying a coded data stream

A technology of data flow and encoding, which is applied in the field of equipment for encoding data flow, can solve the problems of high signal processing and lower quality of data content, and achieve the effects of low overhead, small data flow delay, and reduced data flow delay

Inactive Publication Date: 2012-01-11
SIEMENS ENTERPRISE COMM GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of a transcoder, all data packets in encoded form are decoded and re-encoded, which leads to a reduction in the quality of the data content of the data packets and to high signal processing for the decoding and encoding of the data packets. overhead

Method used

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  • Method and device for modifying a coded data stream
  • Method and device for modifying a coded data stream
  • Method and device for modifying a coded data stream

Examples

Experimental program
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Effect test

Embodiment Construction

[0035] with the help of figure 1 The occurrence of jitter is now explained. A well-known example of a method for compensating for jitter in a data stream is in figure 2 , 3 and 4 are shown. with the help of Figures 5 to 13 Embodiments of the present invention have been described. The occurrence of jitter due to the different transit times of different data packets as they pass through the mesh or network is illustrated by taking the transmission path of an encoded data packet from sender to receiver as an example. The encoded data packets P1 , P2 , P3 , P4 , P5 of the encoded data stream are transmitted by a sending device (hereinafter referred to as sender S) to a receiving device (hereinafter referred to as receiver R) after passing through a network or network N. The data packets P1, P2, P3, P4, P5 may include information of different contents. Possible information contained in the data packets are audio information, image information or video information, wherein i...

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PUM

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Abstract

The invention relates to a method for modifying a coded data stream comprising data packets (P1, P2, P3, P4, P5), of which each data packet (P1, P2, P3, P4, P5) comprises a piece of information (B1, B2, B3, B4, B5). In the data flow, the pieces (B1, B2) of information of consecutive data packets (P1, P2, P3, P4, P5) have time intervals (d1, d3) between each other, which deviate from target time intervals (d1) and which are set to the target time intervals (d1) by inserting an artificially coded first data packet (P2') into the coded data flow in the coded domain after a second data packet or by removing a fourth data packet (P4) present in the coded data flow from the coded data flow in the coded domain.

Description

technical field [0001] The invention relates to a method for modifying a coded data stream consisting of data packets each of which contains information, wherein the information of successive data packets has a time interval between each other which does not coincide with the desired time interval . Furthermore, the invention relates to a device for modifying such a coded data stream composed of data packets. Background technique [0002] Due to the different transit times of different packets of the encoded data stream on the transmission path of the data packets from the sender to the receiver, resulting in the jitter of the data stream, the time interval between the information contained in successive data packets and the distance between the information of these packets The expected time intervals between are not consistent. Jitter in the data stream can lead to flickering and jumpy reproduction of the information contained in the data packets at the receiver. When em...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/234H04N21/238H04N7/26H04N7/50H04L69/14
CPCH04N7/467H04N19/00472H04N21/242H04N7/152H04N7/26941H04N21/234381H04N19/00751H04N21/2662H04N21/23406H04N19/587H04N19/40
Inventor P.阿蒙N.奥尔特尔B.阿格特
Owner SIEMENS ENTERPRISE COMM GMBH & CO KG
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