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Method for synchronizing two data streams and implementation of the method in a receiver

A technology of data flow and receiver, applied in the direction of simultaneous broadcast/distribution through multiple systems, broadcast/distribution of the same information through multiple systems, electrical components, etc., which can solve offset, unable to synchronize IP wireless current, and imperceptible to users And other issues

Active Publication Date: 2021-02-19
TDF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Additionally, there is currently no way to synchronize IP radio streams with FM or DB broadcasts
[0009] Therefore, switching between DB or FM radio mode and IP streaming will result in a few seconds of audio offset (audiooffset)
This offset may include lost seconds (from IP stream to FM or DB broadcast) or repeated seconds (from FM or DB broadcast to IP stream)
[0010] Also, switching from broadcast mode to IP streaming, and vice versa, can be problematic when the content broadcast in DB or FM is limited to the receiving area (e.g. a local radio program), which is not the case with IP streaming
[0011] Therefore, the program content broadcast in DB or FM is different from the program content carried by the IP stream, and switching between the radio mode and the IP stream is not imperceptible to the user

Method used

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  • Method for synchronizing two data streams and implementation of the method in a receiver
  • Method for synchronizing two data streams and implementation of the method in a receiver

Examples

Experimental program
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Embodiment Construction

[0053] figure 1 A synchronization system according to one embodiment of the invention is shown.

[0054] The system includes a service platform 100 capable of communicating with an audio / video receiver 101 . The audio / video receiver 101 can access the service platform 100, for example, via an IP network, such as the Internet.

[0055] In the remainder of the description, the example of a radio receiver is considered; this is for illustration only. It should be understood that the present invention is equally applicable to the reception of video data.

[0056] The radio receiver 101 comprises a position module 102 , for example of the GPS type (Global Positioning System), capable of obtaining position data of the receiver 101 . For example, GPS functionality is typically available when radio receiver 101 is a car radio or a smartphone. Alternatively, radio receiver 101 may be located using a broadcast listing or by detecting local FM or DAB radio stations.

[0057] The radio...

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PUM

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Abstract

The invention relates to a method for synchronizing a first data stream and a second data stream, said method being implemented in a receiver, at least one of the first and second streams being received by radio frequency broadcasting and the other stream being received by an IP network , the first stream and the second stream carry the same service, the method comprising: - receiving (201) an average offset value between the first stream and the second stream; - storing (204.1; 204.2) the first stream in a first buffer region, and store the second stream in the second buffer; - fetch (208) the first fetch from the first buffer, and fetch the second stream from the second buffer, based on the received average offset value two extractions; - comparative analysis (209) of the first extraction and the second extraction to derive the actual offset value between the first stream and the second stream; - synchronizing (210) the first stream according to the obtained actual offset value and second rate.

Description

technical field [0001] The invention relates to the field of distribution of audio or video streams, in particular the synchronization of streams from different sources. [0002] Applied to terminals for receiving audio or video, especially terminals capable of receiving audio or video data carried by different technologies. Background technique [0003] Currently, it is possible to switch between two FM transmissions (Frequency Modulation), or, between FM radio (simultaneous RDS / FM, RDS for Radio Data System) and digital radio DB (standard DAB for Digital Audio Broadcasting or Digital Multimedia Broadcasting DMB) to switch between. [0004] Therefore, either audio stream synchronization (FM / FM switching) or only a small constant offset (FM / DB switching) is required. [0005] Furthermore, it is now possible to listen to the radio via IP streams (IP=Internet Protocol) on terminals connected to the IP network via eg a Wi-Fi interface or a 3G or 4G mobile network. The transm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04H20/18H04H60/11
CPCH04H20/20H04H60/11H04H20/18H04L65/65
Inventor 戴维德·文森特迪米特里·法古
Owner TDF