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US 6,788,227 B2Granted
Apparatus for integrated cascade encoding
AssigneeInternational Business Machines Corporation
InventorsBarbara A. Hall, Agnes Y. Ngai, Michael P. Vachon
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Abstract
Two encoders are used in cascade wherein one encoder functions as a preprocessor for the other by collecting statistics concerning partially processed input data. The statistics thus derived are autonomously transferred to a second decoder in a self-synchronized manner, avoiding any need for external glue logic, and utilized to select encoding options for encoding and/or compressing the data so that the quality of encoded data is optimized based on the content of current input data.
Claims16
An encoding system including
- a first encoder functioning as a preprocessor for collection of statistics concerning input data,
- a second encoder for receiving said statistics concerning input data, said second encoder including means responsive to said statistics for selecting between encoding options, and
- means for autonomously transferring said statistics from said first encoder to said second encoder
- whereby encoding in said second encoder is optimized for current input data without external glue logic.
1 more element
A data encoding/compression method comprising steps of
- providing input data in parallel to a plurality of encoders,
- partially processing said input data in said plurality of encoders to derive partially processed data,
- collecting statistics concerning said partially processed data in a first encoder of said plurality of encoders,
- autonomously transferring said statistics to a second encoder of said plurality of encoders, and
- further processing said partially processed data in said second encoder in accordance with said statistics.
2 more elements
Dependencies are inferred from the claim text.