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US 8,427,578 B2Granted
Method and system for frame rate adaptation
AssigneeBroadcom Corporation
InventorAlexander MacInnis
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Abstract
Described herein are a method and system for frame rate adaptation. There may be conditions that require the rate of a video sequence to be dynamically controlled, and a frame interval may be adaptively selected every frame. A frame within the video sequence may contain, for example, a time stamp that is transmitted to a decoder to indicate the change in temporal spacing between frames.
Claims21
A method for frame rate adaptation, said method comprising:
- selecting one of motion compensation or intra coding according to a spatial prediction and a temporal prediction;
- encoding a video frame in a video sequence based on the selection;
- determining a level of motion in the encoded video frame;
- determining a cost according to one of:
- a motion compensated prediction function or a spatial prediction function of the encoded video frame;
- and
- selecting a frame interval based at least on the level of motion and the cost.
4 more elements
A system for frame rate adaptation, said system comprising:
- a video encoder for encoding a video frame in a video sequence, wherein encoding comprises estimating a level of motion in the encoded video frame and determining a cost, wherein the video encoder further comprises a mode decision engine configured to select one of motion compensation or intra coding according to a spatial prediction and a temporal prediction;
- and
- a frame rate adapter for selecting a frame interval according to the level of motion and the cost, wherein the frame rate adapter is configured to receive a level of motion and a measure of prediction error from the mode decision engine.
A communication device comprising:
- an integrated circuit comprising:
- a memory for storing a video sequence;
- a first circuit operable for motion compensating the video sequence;
- a second circuit for intra coding the video sequence;
- a third circuit for selecting between the first circuit and the second circuit according to a sum of absolute transformed difference (SATD) cost that optimizes a compressed data rate and distortion;
- and
- a fourth circuit for adapting frame rate according to the selection and the cost of the selection.
4 more elements
A system for frame rate adaptation, comprising:
- means for encoding a video frame in a video sequence with an encoder;
- means for determining a level of motion in the encoded video frame;
- means for determining a cost based on a number of computing cycles utilized by the encoding means;
- means for selecting a frame rate for a period of time corresponding to each frame, based at least on the level of motion and the cost;
- and
- means for embedding a time stamp in the encoded video frame, the time stamp indicating a change in temporal spacing between frames to a decoder.
3 more elements
Dependencies are inferred from the claim text.