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FEC encoding method, FEC decoding method, and FEC decoding apparatus

An encoding method and buffer memory technology, applied in the field of FEC decoding method and FEC decoding equipment, FEC encoding method, can solve the problem of not describing detection performance and so on

Inactive Publication Date: 2008-01-02
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disclosures of these documents do not describe the ability to detect whether a period of time since the payload of the media packet has started to be stored in the buffer memory has reached a certain time or to detect any processing in the state at the detection moment

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  • FEC encoding method, FEC decoding method, and FEC decoding apparatus
  • FEC encoding method, FEC decoding method, and FEC decoding apparatus
  • FEC encoding method, FEC decoding method, and FEC decoding apparatus

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Embodiment Construction

[0036] (Description of Embodiment)

[0037] Embodiments of the present invention will be described below with reference to these drawings, which are for illustration only and in no way limit the present invention.

[0038] One form of the present invention (FEC encoding method) can be constituted such that information on the amount of payload stored in the buffer memory used in the FEC operation is further added to the second information. According to this form, the number of payloads (except dummy payloads) used in the FEC operation performed on the encoding side can be easily detected on the decoding side.

[0039] Also, a form can be constituted such that information indicating that the second information is different from the first information is additionally added to the second information. According to this form, it can be easily detected on the decoding side that the FEC operation on the encoding side is not performed using the specified number of payloads.

[0040] A...

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PUM

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Abstract

Disclosed is an FEC encoding method, including: sequentially storing payloads each included in sequentially supplied media packets into a buffer memory; detecting whether number of the payloads stored reaches a prescribed number or whether a period of time since the payloads have started to be stored into the buffer memory reaches a certain period of time; when detecting that the number of the payloads reaches the prescribed number, performing FEC operation using the prescribed number of payloads stored to generate first information for FEC; when detecting that the period of time since the payloads have started to be stored into the buffer memory reaches the certain period of time, performing FEC operation using the payloads stored into the buffer memory to generate second information for FEC; and outputting the first and second information together with the media packets corresponding thereto.

Description

[0001] Cross References to Related Applications [0002] This application is based upon and claims the benefit of priority from prior Japanese Patent Application No. 2006-178568 filed on June 28, 2006, the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates to an FEC encoding method, an FEC decoding method, and an FEC decoding device for recovering packet loss occurring when streaming information is transmitted in packets, such as an FEC encoding method suitable for a case where the supply density of packets varies with time , FEC decoding method and FEC decoding device. Background technique [0004] FEC (Forward Error Correction) is generally used as a technique for recovering local losses at the receiving end during transmission of packets (media packets) that are used to transmit streaming data such as video and audio over the network. [0005] For example, in information transmission using FEC, loss recov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L12/56
CPCH04L1/0052H04L1/0009H04L1/0043
Inventor 川田宏坂本典哉春山秀朗
Owner KK TOSHIBA