Information processing apparatus and method, recording medium, and program

An information processing method for an information processing apparatus that decodes compression-coded video data, comprising the steps of:

• setting a counter indicating a number of times for referring to each of a plurality of pictures contained in a decoding processing unit for executing decoding processing;
• determining the order of the decoding processing for the pictures contained in the decoding processing unit so that I-pictures and P-pictures are decoded before B-pictures;
• controlling the execution of the decoding processing on the basis of the determined order of the decoding processing by using a bank memory having a number of banks which is determined in accordance with the number of pictures contained in the decoding processing unit;
• and
• controlling a timing at which a picture stored in the bank memory is released by changing a value of the counter when a P-picture or a B-picture is decoded in the controlled decoding processing.

A recording medium in which a program allowing a computer to execute processing for decoding compression-coded video data is recorded, the processing comprising the steps of:

• setting a counter indicating a number of times for referring to each of a plurality of pictures contained in a decoding processing unit for executing decoding processing;
• determining the order of the decoding processing for the pictures contained in the decoding processing unit so that I-pictures and P-pictures are decoded before B-pictures;
• controlling the execution of the decoding processing on the basis of the determined order of the decoding processing by using a bank memory having a number of banks which is determined in accordance with the number of pictures contained in the decoding processing unit;
• and
• controlling a timing at which a picture stored in the bank memory is released by changing a value of the counter when a P-picture or a B-picture is decoded in the controlled decoding processing.

A program for allowing a computer to execute processing for decoding compression-coded video data, the processing comprising the steps of:

• setting a counter indicating a number of times for referring to each of a plurality of pictures contained in a decoding processing unit for executing decoding processing;
• determining the order of the decoding processing for the pictures contained in the decoding processing unit so that I-pictures and P-pictures are decoded before B-pictures;
• controlling the execution of the decoding processing on the basis of the determined order of the decoding processing by using a bank memory having a number of banks which is determined in accordance with the number of pictures contained in the decoding processing unit;
• and
• controlling a timing at which a picture stored in the bank memory is released by changing a value of the counter when a P-picture or a B-picture is decoded in the controlled decoding processing.

An information processing apparatus for decoding compression-coded video data, comprising:

• storage means for storing the compression-coded video data;
• readout means for reading out the compression-coded video data from the storage means;
• decode means for decoding the compression-coded video data;
• supply control means for controlling the supply of the compression-coded video data to the decode means;
• control means for controlling processing executed by the supply control means and the decode means;
• and
• playback speed instruction means for providing a playback speed instruction to the control means,
• wherein the decode means includes a bank memory for storing decoded picture data, and
• the control means controls a timing at which a picture stored in the bank memory is released by changing a value of a counter indicating a number of times for which the picture stored in the bank memory is referred to when a P-picture or a B-picture is decoded by the decode means.

An information processing method for an information processing apparatus that decodes compression-coded video data, comprising the steps of:

• reading out the compression-coded video data stored in a storage unit;
• setting a counter indicating a number of times for referring to each of a plurality of pictures including I-pictures, P-pictures, and B-pictures contained in a decoding processing unit for executing decoding processing;
• determining the order of the decoding processing for the pictures contained in the decoding processing unit so that the I-pictures and the P-pictures are decoded before the B-pictures;
• controlling the execution of the decoding processing on the basis of the determined order of the decoding processing by using a bank memory having a number of banks which is determined in accordance with the number of pictures contained in the decoding processing unit;
• and
• controlling a timing at which a picture stored in the bank memory is released by changing a value of the counter when, among the pictures contained in the decoding processing unit of the read compression-coded video data, a P-picture or a B-picture is decoded in the controlled decoding processing.

A recording medium in which a program allowing a computer to execute processing for decoding compression-coded video data is recorded, the processing comprising the steps of:

• reading out the compression-coded video data stored in a storage unit;
• setting a counter indicating a number of times for referring to each of a plurality of pictures including I-pictures, P-pictures, and B-pictures contained in a decoding processing unit for executing decoding processing;
• determining the order of the decoding processing for the pictures contained in the decoding processing unit so that the I-pictures and the P-pictures are decoded before the B-pictures;
• controlling the execution of the decoding processing on the basis of the determined order of the decoding processing by using a bank memory having a number of banks which is determined in accordance with the number of pictures contained in the decoding processing unit;
• and
• controlling a timing at which a picture stored in the bank memory is released by changing a value of the counter when, among the pictures contained in the decoding processing unit of the read compression-coded video data, a P-picture or a B-picture is decoded in the controlled decoding processing.

A program allowing a computer to execute processing for decoding compression-coded video data, the processing comprising:

• reading out the compression-coded video data stored in a storage unit;
• setting a counter indicating a number of times for referring to each of a plurality of pictures including I-pictures, P-pictures, and B-pictures contained in a decoding processing unit for executing decoding processing;
• determining the order of the decoding processing for the pictures contained in the decoding processing unit so that the I-pictures and the P-pictures are decoded before the B-pictures;
• controlling the execution of the decoding processing on the basis of the determined order of the decoding processing by using a bank memory having a number of banks which is determined in accordance with the number of pictures contained in the decoding processing unit;
• and
• controlling a timing at which a picture stored in the bank memory is released by changing a value of the counter when, among the pictures contained in the decoding processing unit of the read compression-coded video data, a P-picture or a B-picture is decoded in the controlled decoding processing.

An information processing apparatus for decoding compression-coded video data including I-pictures, P-pictures, and B-pictures, comprising:

• at least one decoder decoding the compression-coded video data;
• a supply controller controlling the supply of the compression-coded video data to the decoder;
• and
• a controller controlling processing executed by the supply controller and the decoder,
• wherein the decoder includes a bank memory for storing decoded picture data, and
• the controller controls a timing at which a picture stored in the bank memory is released by changing a value of a first counter indicating a number of times for which the picture stored in the bank memory is referred to when a P-picture or a B-picture is decoded by the decoder.

An information processing apparatus for decoding compression-coded video data, comprising:

• a storage unit storing the compression-coded video data;
• a readout unit reading out the compression-coded video data from the storage unit;
• a decoder decoding the compression-coded video data;
• a supply controller controlling the supply of the compression-coded video data to the decoder;
• a controller controlling processing executed by the supply controller and the decoder;
• and
• a playback speed instruction unit providing a playback speed instruction to the controller,
• wherein the decoder includes a bank memory for storing decoded picture data, and
• the controller controls a timing at which a picture stored in the bank memory is released by changing a value of a counter indicating a number of times for which the picture stored in the bank memory is referred to when a P-picture or a B-picture is decoded by the decoder.