Delay Aware Rate Control In The Context Of Hierarchical P Picture Coding
First Claim
1. A method of determining a target number of bits for a coded picture in a prediction structure, comprising(a) determining an end-to-end delay, and(b) modulating a coded picture size based on the determined end-to-end delay.
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Abstract
The present invention provides bit rate control techniques for a hybrid block based motion compensated predictive video encoder (e.g., H.264, as well as other video coding algorithms and standards). The techniques aim to reduce the picture-to-picture bit rate fluctuations within a prediction structure or over a short time interval that can lead to undesirable additional delay on links without over-provisioned capacity. In one embodiment of the present invention, the end to end delay is estimated. The end to end delay is used to determine limits on the modulation of the target coded picture size, with the goal of trading an acceptable amount of additional delay for a better coding efficiency.
16 Citations
18 Claims
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1. A method of determining a target number of bits for a coded picture in a prediction structure, comprising
(a) determining an end-to-end delay, and (b) modulating a coded picture size based on the determined end-to-end delay.
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9. One or more computer readable media for performing a method of determining a target number of bits for a coded picture in a prediction structure, comprising
(a) determining an end-to-end delay, and (b) modulating a coded picture size based on the determined end-to-end delay.
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17. A video coder for modulating a coded picture size based on a determined end-to-end delay comprising:
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(a) a control module; and (b) a video encoding module. wherein the control module is configured to determine a quantizer parameter and provide the quantizer parameter to the video encoder module, and the video encoder module is configured to receive the quantizer parameter from the control module and uncompressed video pictures from a video source and translate the video pictures into a video bitstream based on the quantizer parameter. - View Dependent Claims (18)
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Specification