Clock recovery for a DVB-T to DVB-S transmodulator

A DVB-T and converter technology, applied in the field of digital transmission, can solve problems such as non-application

Inactive Publication Date: 2005-08-31
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It does not apply to individual reception by a single receiver of a digital television signal transmitted using a standard different from that with which the single receiver is compatible

Method used

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  • Clock recovery for a DVB-T to DVB-S transmodulator
  • Clock recovery for a DVB-T to DVB-S transmodulator
  • Clock recovery for a DVB-T to DVB-S transmodulator

Examples

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Embodiment Construction

[0032] figure 1 Device according to the invention is illustrated for generating a second signal encoded in a second encoding format at a second data rate R2 from a first encoded signal S1 provided by a data source SOURCE in a first encoding format at a first data rate R1 S2. Due to the implementation of the decoder, the instantaneous data rate R1 is not constant. The second data rate R2 is characterized by having a fixed instantaneous data rate and locked to the average value of the data rate R1. Converter equipment includes:

[0033] Decoding means DECOD for decoding the first coded signal S1 and for generating a decoded signal denoted TS,

[0034] Encoding means for encoding said decoded signal into a second encoded signal S2,

[0035] · Clock recovery means, comprising an oscillator OSC with a control frequency FOSC controlled by two complementary loops, comprising one using Free running reference clock F ref and a coarse loop of programmable dividing means COUNT1 and...

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PUM

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Abstract

The invention relates to a clock recovery system for a transmodulator allowing reception of a COFDM / DVB-T video signal encoded in the Terrestrial Digital Video Broadcasting format (DVB-T), via a terrestrial antenna and via a DVB-S like receiver suited to receive a QPSK / DVB-S video signal encoded in the Satellite Digital Video Broadcasting format (DVB-S).

Description

technical field [0001] The present invention relates to digital transmission. In particular, it relates to a converter device for generating a second signal encoded in a second encoding format at a second data rate from a first encoded signal provided by a data source in a first encoding format at a first data rate. [0002] The invention is advantageously applied in digital television to receiver and converter devices which allow reception of DVB-T video signals encoded in the terrestrial Digital Video Broadcasting format (DVB-T), DVB - A receiver of class S adapted to receive DVB-S video signals encoded in the Digital Video Broadcasting-Satellite format (DVB-S). Background technique [0003] International patent application published under number WO99 / 37093 describes a system for the distribution of a plurality of television signals transmitted with different standards in a common environment. According to the system, one or more digital signals can be received by a sing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/07H04N5/44H04N5/46H04N7/01
CPCH04N5/46H04N21/6112H04N21/4622H04N21/4382H04N21/4305H04N5/4401H04N21/6143H04N21/426H04J3/07H04N7/01
Inventor P·洛耶
Owner KONINK PHILIPS ELECTRONICS NV
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