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US 10,805,635 B1Granted
Apparatus and method for coding tree unit bit size limit management
AssigneeNGCodec Inc.
InventorsAlberto Duenas, Frank Bossen
Life of this patent
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Abstract
A hardware encoder has a bit estimation block to compute an estimated bit size for a Coding Tree Unit (CTU). A CTU bit size limit manager selects quantization parameters for use in quantization. The quantization parameters are selected based upon the estimated bit size to insure that the CTU in coded form will not exceed a CTU bit size limit.
Claims9
A hardware encoder with pipeline stages for coding tree unit bit size limit management, comprising:
- a bit estimation block pipeline stage operating after a mode decision stage and before a quantization stage to compute an estimated bit size for a Coding Tree Unit (CTU) before the CTU is coded;
- and
- a CTU bit size limit manager pipeline stage to select quantization parameters for use in quantization, wherein the quantization parameters are selected based upon the estimated bit size to insure that the CTU in coded form will not exceed a CTU bit size limit.
Dependencies are inferred from the claim text.