US 2015/0101003 A1 · DATA TRANSMISSION APPARATUS, SYSTEM AND METHOD

Abstract

This invention relates to a method and system of transmitting video data and data to a plurality of client radio receivers over an air interface using an adaptive encoding/transcoding scheme and updating the adaptive encoding/transcoding scheme in dependence upon received feedback data. The invention further describes estimating channel states and distortion levels for a plurality of transmission modes, then selecting that transmission mode for subsequent data transmission that has the lowest distortion level. Control data items can be extracted from the first data stream to produce a multimedia data stream and a control data stream and the multimedia data stream is transmitted over a first channel; the control data stream is transmitted over a second channel. The received data stream may be put into a plurality of multimedia slices having a predetermined slice size; and encoded into first data packets of a first predetermined size; which are divided into respective integral second data packets of a second predetermined size and are aggregated into a stream of third data packets of a third predetermined size.

Claims18

Dependent claims

1-24. (canceled)

A method of transmitting data to a plurality of receivers over a transmission channel, the method comprising:

transmitting the data to a plurality of receivers over a transmission channel using a first transmission mode;
estimating a channel state for the transmission channel for the first transmission mode to produce a first channel estimate;
estimating rate distortion for the transmission channel for the first transmission mode using the first channel estimate to produce a first distortion estimate;
estimating a channel state for the transmission channel for a second transmission mode, different to the first transmission mode, to produce a second channel estimate;
estimating rate distortion for the transmission channel for the second transmission mode using the second channel estimate to produce a second distortion estimate;
selecting, as a selected transmission mode, that transmission mode from the first and second transmission modes which has the lowest corresponding distortion estimate;
and
transmitting the data to the plurality of receivers over the transmission channel using the selected transmission mode.

5 more elements

A system for transmitting data to a plurality of receivers over a transmission channel, the system comprising:

a transmitter operable to transmit the data to a plurality of receivers over a transmission channel using a first transmission mode;
a channel state estimator operable to estimate a channel state for the transmission channel for the first transmission mode to produce a first channel estimate, and operable to estimate a channel state for the transmission channel for a second transmission mode, different to the first transmission mode, to produce a second channel estimate;
a distortion estimator operable to estimate rate distortion for the transmission channel for the first transmission mode using the first channel estimate to produce a first distortion estimate, and operable to estimate rate distortion for the transmission channel for the second transmission mode using the second channel estimate to produce a second distortion estimate;
and
a rate selector operable to select, as a selected transmission mode, that transmission mode from the first and second transmission modes which has the lowest corresponding distortion estimate;
wherein the transmitter is operable to transmit subsequent data to the plurality of receivers over the transmission channel using the selected transmission mode.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/510,708Filed 9 Oct 2014

Priority

18 Jun 2013

Published

9 Apr 2015

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

H04N 21/64761
Control signals issued by the network directed to the server or the client: directed to the server
H04L 1/0001
Arrangements for detecting or preventing errors in the information received: systems modifying transmission characteristics according to link…
H04L 1/0026
Characterised by the signalling: transmission of channel quality indication
H04N 19/147
Data rate or code amount at the encoder output: according to rate distortion criteria

Data transmission apparatus, system and method

Life of this patent

Data transmission apparatus, system and method

Life of this patent

Abstract

Claims18