DVB/T
Product Details
Encoding of audio, video, data, or files using H.264/AAC standard.
Use of IP datacasting for delivery of data to multiple receivers.
Organization of data into a group of packets for each channel Time slicing.
Insertion of appropriate signaling data for carrying the DVB-H stream information.
Application of forward error correction and multiprotocol encapsulation.
GPS time stamping for single-frequency networks.
Modulation using QPSK, 16QAM, or 64QAM and 4K (or 8K) COFDM carriers with frequency interleavi
DVB-T has technical characteristics that make it a very flexible system:
Technical Features
One final technical aspect of DVB-T worth mentioning is its capacity for Hierarchical Modulation. Using this technique,two completely separate data streams are modulated onto a single DVB-T signal. A High Priority (HP) stream is embedded within a Low Priority (LP) stream.Broadcasters can thus target two different types of receiver with two completely different services. For example, DVB-H mobile TV services optimized for more difficult reception conditions could be placed in the HP stream, with HDTV services targeted to fixed antennas delivered in the LP stream.
Using different combinations of the above parameters a DVB-T network can be designed to match the requirements of the network operator, finding the right balance between robustness and capacity. Networks can be designed to deliver a whole range of services: SDTV, radio, interactive services, HDTV and, using multi-protocol encapsulation, even IP datacasting.
Overview
DVB-T, in common with almost all modern terrestrial transmission systems, uses OFDM (orthogonal frequency division multiplex) modulation. This type of modulation, which uses a large number of sub-carriers, delivers a robust signal that has the ability to deal with very severe channel conditions.
DVB/T
DVB-T is a technical standard developed by the DVB Project that specifies the framing structure, channel coding and modulation for digital terrestrial television (DTT) Broadcasting .
DVB/T
DVB-T is a technical standard developed by the DVB Project that specifies the framing structure, channel coding
- Country:India
- telephone:91-918025630014
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DVB/T DVB-T is a technical standard developed by the DVB Project that specifies the framing structure, channel coding |
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