Hierarchical lossless encoding/decoding method, hierarchical lossless encoding method, hierarchical lossless decoding method, its apparatus and program

A hierarchical lossless encoding and decoding method comprising the steps of:

• in an encoding apparatus,
• encoding an input signal into low-bit-rate encoded data and transmitting the low-bit-rate encoded data to a decoding apparatus;
• encoding a differential signal between a low-bit-rate decoded signal produced by decoding said low-bit-rate encoded data and said input signal, into lossless encoded data, and transmitting the lossless encoded data to the decoding apparatus;
• and
• extracting corrective information from said input signal and transmitting the corrective information to the decoding apparatus;
• in the decoding apparatus,
• decoding the low-bit-rate encoded data transmitted from the encoding apparatus into a low-bit-rate decoded signal;
• decoding the lossless encoded data transmitted from the encoding apparatus into a differential signal;
• adding said low-bit-rate decoded signal and said differential signal into a lossless reproduced signal;
• and
• correcting said lossless reproduced signal based on said corrective information.

A hierarchical lossless encoding and decoding method comprising the steps of:

• in an encoding apparatus,
• encoding an input signal into low-bit-rate encoded data and transmitting the low-bit-rate encoded data to a decoding apparatus;
• decoding said low-bit-rate encoded data into a low-bit-rate decoded signal, extracting corrective information from said low-bit-rate decoded signal, and transmitting the corrective information to the decoding apparatus;
• and
• encoding a differential signal between a corrected low-bit-rate decoded signal produced by correcting said low-bit-rate decoded signal and said input signal, into lossless encoded data, and transmitting the lossless encoded data to the decoding apparatus;
• in the decoding apparatus,
• decoding the low-bit-rate encoded data transmitted from the encoding apparatus into a low-bit-rate decoded signal;
• decoding the lossless encoded data transmitted from the encoding apparatus into a differential signal;
• and
• correcting said low-bit-rate decoded signal based on said corrective information, and adding the corrected low-bit-rate decoded signal to said differential signal.

A hierarchical lossless encoding method comprising the steps of:

• encoding an input signal into low-bit-rate encoded data;
• decoding said low-bit-rate encoded data into a low-bit-rate decoded signal;
• encoding a differential signal between said low-bit-rate decoded signal and said input signal into lossless encoded data;
• and
• extracting corrective information only from said low-bit-rate decoded signal.

A hierarchical lossless encoding method comprising the steps of:

• encoding an input signal into low-bit-rate encoded data;
• decoding said low-bit-rate encoded data into a low-bit-rate decoded signal;
• encoding a differential signal between said low-bit-rate decoded signal and said input signal into lossless encoded data;
• and
• extracting corrective information only from said input signal.

A hierarchical lossless encoding method comprising the steps of:

• encoding an input signal into low-bit-rate encoded data;
• decoding said low-bit-rate encoded data into a low-bit-rate decoded signal;
• extracting corrective information only from said low-bit-rate decoded signal;
• and
• encoding a differential signal between a corrected low-bit-rate decoded signal produced by correcting said low-bit-rate decoded signal and said input signal, into lossless encoded data.

A hierarchical lossless encoding and decoding apparatus comprising an encoding apparatus and a decoding apparatus, said encoding apparatus comprising:

• a low-bit-rate encoder for encoding an input signal into low-bit-rate encoded data and transmitting the low-bit-rate encoded data to the decoding apparatus;
• a low-bit-rate decoder for decoding said low-bit-rate encoded data into a low-bit-rate decoded signal and outputting the low-bit-rate decoded signal;
• a lossless encoder for encoding a differential signal between the low-bit-rate decoded signal output from said low-bit-rate decoder and said input signal, into lossless encoded data, and transmitting the lossless encoded data to the decoding apparatus;
• and
• a corrective information extractor for extracting corrective information from said low-bit-rate decoded signal and transmitting the corrective information to the decoding apparatus;
• said decoding apparatus comprising:
• a low-bit-rate decoder for decoding the low-bit-rate encoded data transmitted from said encoding apparatus into a low-bit-rate decoded signal;
• a lossless decoder for decoding the lossless encoded data transmitted from said encoding apparatus into a differential signal;
• a corrector for correcting said low-bit-rate decoded signal based on the corrective information transmitted from said encoding apparatus;
• and
• an adder for adding the low-bit-rate decoded signal corrected by said corrector and said differential signal into a lossless reproduced signal.

A hierarchical lossless encoding and decoding apparatus comprising an encoding apparatus and a decoding apparatus, said encoding apparatus comprising:

• a low-bit-rate encoder for encoding an input signal into low-bit-rate encoded data and transmitting the low-bit-rate encoded data to the decoding apparatus;
• a low-bit-rate decoder for decoding said low-bit-rate encoded data into a low-bit-rate decoded signal and outputting the low-bit-rate decoded signal;
• a lossless encoder for encoding a differential signal between the low-bit-rate decoded signal output from said low-bit-rate decoder and said input signal, into lossless encoded data, and transmitting the lossless encoded data to the decoding apparatus;
• and
• a corrective information extractor for extracting corrective information from said input signal and transmitting the corrective information to the decoding apparatus;
• said decoding apparatus comprising:
• a low-bit-rate decoder for decoding the low-bit-rate encoded data transmitted from said encoding apparatus into a low-bit-rate decoded signal;
• a lossless decoder for decoding the lossless encoded data transmitted from said encoding apparatus into a differential signal;
• an adder for adding said low-bit-rate decoded signal and said differential signal into a lossless reproduced signal;
• and
• a corrector for correcting said lossless reproduced signal based on said corrective information.

A hierarchical lossless encoding and decoding apparatus comprising an encoding apparatus and a decoding apparatus, said encoding apparatus comprising:

• a low-bit-rate encoder for encoding an input signal into low-bit-rate encoded data and transmitting the low-bit-rate encoded data to the decoding apparatus;
• a low-bit-rate decoder for decoding said low-bit-rate encoded data into a low-bit-rate decoded signal;
• a corrective information extractor for extracting corrective information from said low-bit-rate decoded signal and transmitting the corrective information to the decoding apparatus;
• and
• a lossless encoder for encoding a differential signal between a corrected low-bit-rate decoded signal produced by correcting the low-bit-rate decoded signal and said input signal, into lossless encoded data, and transmitting the lossless encoded data to the decoding apparatus;
• and
• said decoding apparatus comprising:
• a low-bit-rate decoder for decoding the low-bit-rate encoded data transmitted from said encoding apparatus into a low-bit-rate decoded signal;
• a lossless decoder for decoding the lossless encoded data transmitted from said encoding apparatus into a differential signal;
• and
• a corrector for correcting said low-bit-rate decoded signal based on said corrective information, and adding the corrected low-bit-rate decoded signal to said differential signal.

A hierarchical lossless encoding apparatus comprising:

• a low-bit-rate encoder for encoding an input signal into low-bit-rate encoded data;
• a low-bit-rate decoder for decoding said low-bit-rate encoded data into a low-bit-rate decoded signal;
• a lossless encoder for encoding a differential signal between the low-bit-rate decoded signal and said input signal, into lossless encoded data;
• and
• a corrective information extractor for extracting corrective information only from said low-bit-rate decoded signal.

A hierarchical lossless encoding apparatus comprising:

• a low-bit-rate encoder for encoding an input signal into low-bit-rate encoded data;
• a low-bit-rate decoder for decoding said low-bit-rate encoded data into a low-bit-rate decoded signal;
• a lossless encoder for encoding a differential signal between the low-bit-rate decoded signal and said input signal, into lossless encoded data;
• and
• a corrective information extractor for extracting corrective information only from said input signal.

A hierarchical lossless encoding apparatus comprising:

• a low-bit-rate encoder for encoding an input signal into low-bit-rate encoded data;
• a low-bit-rate decoder for decoding said low-bit-rate encoded data into a low-bit-rate decoded signal;
• a corrective information extractor for extracting corrective information only from said low-bit-rate decoded signal;
• a corrector for correcting said low-bit-rate decoded signal and outputting the corrected low-bit-rate decoded signal;
• and
• a lossless encoder for encoding a differential signal between the corrected low-bit-rate decoded signal and said input signal, into lossless encoded data.

A hierarchical lossless encoding and decoding apparatus having a computer readable medium having a computer program for enabling a computer to perform the steps of:

• in an encoding apparatus,
• encoding an input signal into low-bit-rate encoded data and transmitting the low-bit-rate encoded data to a decoding apparatus;
• decoding said low-bit-rate encoded data into a low-bit-rate decoded signal;
• encoding a differential signal between said low-bit-rate decoded signal and said input signal into lossless encoded data, and transmitting the lossless encoded data to the decoding apparatus;
• and
• extracting corrective information from said low-bit-rate decoded signal and transmitting the corrective information to the decoding apparatus;
• in the decoding apparatus,
• decoding said low-bit-rate encoded data transmitted from the encoding apparatus into a low-bit-rate decoded signal;
• decoding said lossless encoded data transmitted from the encoding apparatus into a differential signal;
• and
• correcting said low-bit-rate decoded signal based on said corrective information transmitted from said encoding apparatus, and adding the corrected low-bit-rate decoded signal and said differential signal into a lossless reproduced signal.

A hierarchical lossless encoding and decoding apparatus having a computer readable medium having a computer program for enabling a computer to perform the steps of:

• in an encoding apparatus,
• encoding an input signal into low-bit-rate encoded data and transmitting the low-bit-rate encoded data to a decoding apparatus;
• decoding said low-bit-rate encoded data into a low-bit-rate decoded signal;
• encoding a differential signal between said low-bit-rate decoded signal and said input signal into lossless encoded data and transmitting the lossless encoded data to the decoding apparatus;
• and
• extracting corrective information from said input signal and transmitting the corrective information to the decoding apparatus;
• in the decoding apparatus,
• decoding said low-bit-rate encoded data transmitted from the encoding apparatus into a low-bit-rate decoded signal;
• decoding said lossless encoded data transmitted from the encoding apparatus into a differential signal;
• adding said low-bit-rate decoded signal and said differential signal into a lossless reproduced signal;
• and
• correcting said lossless reproduced signal based on said corrective information.

A hierarchical lossless encoding and decoding apparatus having a computer readable medium having a computer program for enabling a computer to perform the steps of:

• in an encoding apparatus,
• encoding an input signal into low-bit-rate encoded data and transmitting the low-bit-rate encoded data to a decoding apparatus;
• decoding said low-bit-rate encoded data into a low-bit-rate decoded signal;
• extracting corrective information from said low-bit-rate decoded signal and transmitting the corrective information to the decoding apparatus;
• and
• encoding a differential signal between a corrected low-bit-rate decoded signal produced by correcting said low-bit-rate decoded signal and said input signal, into lossless encoded data and transmitting the lossless encoded data to the decoding apparatus;
• in the decoding apparatus,
• decoding said low-bit-rate encoded data transmitted from the encoding apparatus into a low-bit-rate decoded signal;
• decoding said lossless encoded data transmitted from the encoding apparatus into a differential signal;
• and
• correcting said low-bit-rate decoded signal based on said corrective information, and adding the corrected low-bit-rate decoded signal to said differential signal.