US 8,798,144 B2Granted

System and method for determining encoding parameters

AssigneeThales

InventorsCatherine Lamy-Bergot, Benjamin Gadat

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Abstract

A method for optimizing a video transmission, in a constrained environment using a video coder adapted for coding the video data to be transmitted, includes determining one or more compression parameters for the video coder considered to transmit the video data at a given throughput or for a given quality. The method defines and uses reference charts for the coder considered, and predicts for the part of the video sequence undergoing compression, using the reference charts, compression parameters to be used, such as the quantization interval, by selecting a chart for which the targeted range of throughput or of quality is the closest in distance to the part of the sequence to be compressed, while complying with a given margin, and updates with an iterative method the prediction step to converge on the best choice of parameterization. The iteration includes at least one compression step followed by a verification step, to compress the video data to be transmitted with the parameters.

Claims12

Dependent claims

A method for optimizing a video transmission in a constrained environment, video data being transmitted through a channel with errors or losses, throughput of the data transmission channel being finite, wherein a video coder is configured to code the video data to be transmitted, said method comprising:

determining one or more compression parameters for the video coder that transmits said video data at a predetermined throughput Di and a predetermined quality Qi by:
defining reference charts for said video coder based on reference video data, the reference video data being different from the video data to be transmitted, the reference charts comprising a QP throughput chart representation and a QP peak signal-to-noise ratio chart representation;
predicting, for part of the video data undergoing compression and based on said reference charts, compression parameters, the compression parameters comprising a quantization interval QP based on one of the QP throughput chart representation and the QP peak signal-to-noise ratio chart representation, and a targeted range of throughput Di or quality Qi, closest in distance to said part of the video data to be compressed, while complying with a given margin;
updating the predicting to converge on optimized compression parameters, said updating comprising compressing and verifying the part of the video data undergoing compression;
and
compressing the video data to be transmitted based on said determined compression parameters.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/122,568Filed 5 Oct 2009
Priority: FR 08 055136 Oct 2008
Published: US 2011/0268187 A13 Nov 2011
Granted: 5 Aug 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H04N 19/00
Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
H04N 19/124
Characterised by the element, parameter or selection affected or controlled by the adaptive coding: quantisation
H04N 19/147
Data rate or code amount at the encoder output: according to rate distortion criteria
H04N 19/149
Data rate or code amount at the encoder output: by estimating the code amount by means of a model, e.g. mathematical model or statistical model