Video Encoding Method and Device
First Claim
1. A video coding method, comprising the following steps:
- coding successive pictures of a video sequence so as to generate coding parameters, the coding of at least one picture being effected in relation to at least one previous picture of the video sequence, said previous picture being temporarily recorded in a picture memory;
including the coding parameters in an output stream to be transmitted to a station comprising a decoder;
receiving, from said station, return information about the playback of the pictures of the video sequence by the decoder;
analyzing the return information so as to evaluate a delay of the return channel with respect to the transmission of the output stream; and
determining a quantity of memory allocated to the picture memory in the decoder as a function of the evaluated delay, and indicating said quantity of memory to the decoder.
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Accused Products
Abstract
Successive images of a video image are encoded in order to generate parameters which are included in an output flow that is to be transmitted to a decoder. The encoding of certain images is carried out in inter mode in relation to one or several previous images of the sequence, said previous images being temporarily stored in an image memory. Return information on the restoration of the images of the video sequence by the decoder are received by the encoder and analyzed in order to evaluate the time lag of the return channel in relation to the transmission of the output flow. The encoder determines an amount of memory allocated to the image memory in the decoder according to the evaluated time lag and indicates said amount of memory to the decoder.
5 Citations
10 Claims
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1. A video coding method, comprising the following steps:
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coding successive pictures of a video sequence so as to generate coding parameters, the coding of at least one picture being effected in relation to at least one previous picture of the video sequence, said previous picture being temporarily recorded in a picture memory;
including the coding parameters in an output stream to be transmitted to a station comprising a decoder;
receiving, from said station, return information about the playback of the pictures of the video sequence by the decoder;
analyzing the return information so as to evaluate a delay of the return channel with respect to the transmission of the output stream; and
determining a quantity of memory allocated to the picture memory in the decoder as a function of the evaluated delay, and indicating said quantity of memory to the decoder. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A video coder, comprising:
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means for coding successive pictures (F) of a video sequence so as to generate coding parameters, the coding of at least one picture being effected in relation to at least one previous picture of the video sequence, said previous picture being temporarily recorded in a picture memory;
means for forming an output stream of the coder to be transmitted to a station comprising a decoder, the output stream including said coding parameters;
means for receiving, from said station, return information about the playback of the pictures of the video sequence by the decoder;
means for analyzing the return information so as to evaluate a delay of the return channel with respect to the transmission of the output stream; and
means for determining a quantity of memory allocated to the picture memory in the decoder as a function of the evaluated delay, and for indicating said quantity of memory to the decoder. - View Dependent Claims (8, 9, 10)
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Specification