System for encoding and decoding layered compressed video data
AssigneeThomson Licensing
InventorsTihao Chiang, Huifang Sun, Joel Walter Zdepski
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Abstract
A dynamically configurable video signal processing system including an encoder and decoder processes data in the form of hierarchical layers. The system partitions data between hierarchical layers and allows variation in the number of layers employed. Data is automatically partitioned into one or more hierarchical layers as a function of one or more parameters selected from available system bandwidth, input data rate, and output signal quality. In addition, the image resolution and corresponding number of pixels per image of the data may be varied as a function of system parameters.
Claims15
A digital signal processing system for adaptively decoding a datastream including image representative input pixel data comprising a sequence of image frames or fields and partitioned into one or more data segments, said system comprising:
- a processor for deriving synchronization information from said datastream;
- a controller for deriving configuration information from said datastream and providing a control signal representing said configuration information;
- and
- a decoder for decoding said input pixel data using said synchronization information, said decoder being adaptively configured to decode, the number of said data segments of said input pixel data in response to said control signal wherein said number of said data segments of said input pixel data is dynamically varied in response to a periodically updated rate distortion computation.
Apparatus for decoding input data representing compressed images of variable spatial resolution, comprising:
- a control network for deriving configuration information from said input data and providing a configuration control signal representing said configuration information;
- and
- a decompression network responsive to said input data and to said control signal for decompressing said input data to provide decompressed image data and including an adaptively configurable decoder, wherein said decoder is dynamically configured for decoding input pixel data spatial resolution variable in response to a periodically performed rate distortion computation.
In a system including a decoder for adaptively decoding a datastream including image representative input pixel data comprising a sequence of image frames or fields and partitioned into one or more data segments, a method comprising the steps of:
- a) deriving synchronization information from said datastream;
- b) deriving configuration information from said datastream;
- c) generating a control signal representing said configuration information;
- d) configuring a decoder to decode the number of said data segments of said input pixel data in response to said control signal wherein said number of said data segments of said input pixel data dynamically varies in response to a periodically performed rate distortion computation;
- and
- e) applying said decoder to decode said input pixel data using said synchronization information.
In a system including a decoder for decoding input data representing compressed images of variable spatial resolution, a method comprising the steps of:
- a) deriving configuration information from said input data;
- b) generating a configuration control signal representing said configuration information;
- c) dynamically configuring a decoder for decoding input data spatial resolution variable in response to a periodically performed rate distortion computation;
- and
- d) employing said decoder for decoding and decompressing said input data to provide decompressed image data.
Dependencies are inferred from the claim text.