METHOD FOR DYNAMICALLY ADAPTING VIDEO IMAGE PARAMETERS FOR FACILITATING SUBSEQUENT APPLICATIONS
A method for adapting an input video stream (V) for facilitating a subsequent application to be performed upon receipt of the adapted video stream by a receiver comprises the steps of determining control parameters (AVP) from quality requirement parameters (QR), bandwidth limitation parameters (BW) and spatial parameters (x, y), a step of performing a spatial-temporal adaptation of said input video stream (V) in accordance with said control parameters (AVP) to thereby generate said adapted video stream (AV) for provision to said receiver.
1 . Method for adapting an input video stream (V) for facilitating a subsequent application to be performed upon receipt of the adapted video stream by a receiver, said method comprising determining control parameters from quality requirement parameters, bandwidth limitation parameters and spatial parameters, performing a spatial-temporal adaptation of said input video stream in accordance with said control parameters to thereby generate said adapted video stream for provision to said receiver.
2 . Method according to claim 1 wherein said spatial-temporal adaptation is performed by decreasing the resolution of areas of images of said input video stream which are not relevant with respect to said application, with respect to these areas of said images of said input video stream which are relevant to said application.
3 . Method according to claim 1 wherein said spatial-temporal adaptation is performed by decreasing the frame rate of the parts of images of said input video stream which are not relevant with respect to said application, with respect to these parts of the images of said input video stream which are relevant with respect to said application.
4 . Method according to claim 1 , wherein said application comprises object recognition.
5 . Video adaptation device for adapting an input video stream, said video adaptation device being adapted to determine control parameters for being used when performing a spatial-temporal adaptation of said input video stream to thereby generate an adapted video stream, said video adaptation device being further adapted to calculate said control parameters from quality requirement parameters, bandwidth limitation parameters and spatial parameters being provided to said video adaptation device
6 . Video Adaptation Device according to claim 5 , being further adapted to perform said spatial-temporal adaptation by decreasing the resolution of areas of images of said input video stream outside the regions defined by said spatial parameters.
7 . Video Adaptation Device according to claim 5 being further adapted to perform said spatial-temporal adaptation by decreasing the frame rate of parts of images of said input video stream outside the regions defined by said spatial parameters.
8 . Video Adaptation Device according to claim 5 , being further adapted to perform an object detection operation on said input video stream, thereby generating detected object features.
9 . Terminal comprising a video adaptation device in accordance to claim 5 , an encoder for encoding the adapted video stream, thereby providing an encoded adapted video stream and means for further transmitting said encoded adapted video stream towards a receiver device via a communications network.
10 . Terminal according to claim 8 further comprising video descriptor means coupled to said video adaptation device and being adapted to generate metadata from said detected object features for provision to an encapsulation device of said terminal, said encapsulation device being adapted to generate enhanced encoded adapted video packets from said encoded adapted video stream and said metadata for provision to said receiver device.
11 . Application server of a communications network, said application server being communicatively coupled to a terminal in accordance with claim 9 , and comprising a decoder for decoding said encoded adapted video stream for provision to an application service module of said application server, said application service module being adapted to perform an application on said adapted video stream, and comprising means for storing requirement parameters for said application service module and for providing said requirement parameters as said quality requirement parameters to said video adaptation device of said terminal.
12 . Application server according to claim 11 wherein said application service module comprises a video object recognition module adapted to perform object recognition on said adapted video stream.