Video processing apparatus for generating count table in external storage device of hardware entropy engine and associated video processing method

A video processing apparatus comprising:

• an external storage device;
• a hardware entropy engine, external to the external storage device, wherein the hardware entropy engine is arranged to perform entropy processing of a current picture, and further arranged to output count information to the external storage device during the entropy processing of the current picture;
• and
• a software execution engine, external to the external storage device, wherein when loaded and executed by the software execution engine, a software program instructs the software execution engine to convert the count information into count table contents, and generate a count table in the external storage device according to at least the count table contents, wherein the count table is referenced to apply a backward adaptation to a probability table that is selectively used by the hardware entropy engine to perform entropy processing of a next picture;
• wherein the hardware entropy engine has an internal storage device arranged to store the probability table;
• the video processing apparatus further comprises:
• a direct memory access (DMA) circuit, arranged to transmit the probability table from the internal storage device to the external storage device;
• and
• the software execution engine performs the backward adaptation upon the probability table in the external storage device according to the count table.

A video processing method comprising:

• performing, by a hardware entropy engine, entropy processing of a current picture and outputting count information to an external storage device of the hardware entropy engine during the entropy processing of the current picture;
• and
• executing a software program to convert the count information into count table contents and generate a count table in the external storage device according to at least the count table contents, wherein the count table is referenced to apply a backward adaptation to a probability table that is selectively used by the hardware entropy engine to perform entropy processing of a next picture;
• wherein the hardware entropy engine has an internal storage device arranged to store the probability table;
• and the video processing method further comprises:
• executing the software program to directly read the probability table from the internal storage device to the external storage device, and perform the backward adaptation upon the probability table in the external storage device according to the count table.