Transmission apparatus, transmission method, reception apparatus, and reception method

A transmission method, comprising:

• adding first metadata, second metadata, and third metadata to a compressed digital audio signal of each channel of a specific number of channels, wherein
• the first metadata indicates a sending frequency of the compressed digital audio signal,
• the second metadata indicates a sampling frequency;
• a conversion of an uncompressed digital audio signal of the each channel of the specific number of channels into an analog signal is based on the sampling frequency, and
• the third metadata indicates a ratio of the sending frequency to the sampling frequency;
• and
• transmitting, via a specific path, the compressed digital audio signal of the each channel with the first metadata, the second metadata, and the third metadata to an external device.

A reception apparatus, comprising:

• a reception unit configured to receive a compressed digital audio signal of each channel of a specific number of channels, wherein
• the compressed digital audio signal is received from an external device via a specific path,
• the compressed digital audio signal is received with first metadata, second metadata, and third metadata,
• the first metadata indicates a sending frequency of the compressed digital audio signal,
• the second metadata indicates a sampling frequency,
• a conversion of an uncompressed digital audio signal of the each channel of the specific number of channels into an analog signal is based on the sampling frequency, and
• the third metadata indicates a ratio of the sending frequency to the sampling frequency;
• and
• a processing unit configured to execute a process associated with the compressed digital audio signal based on at least one of the first metadata, the second metadata or the third metadata.

A reception method, comprising:

• receiving a compressed digital audio signal of each channel of a specific number of channels, wherein
• the compressed digital audio signal is received from an external device via a specific path,
• the compressed digital audio signal is received with first metadata, second metadata, and third metadata,
• the first metadata indicates a sending frequency of the compressed digital audio signal,
• the second metadata indicates a sampling frequency,
• a conversion of an uncompressed digital audio signal of the each channel of the specific number of channels into an analog signal is based on the sampling frequency, and
• the third metadata indicates a ratio of the sending frequency to the sampling frequency;
• and
• executing a process associated with the compressed digital audio signal based on at least one the first metadata, the second metadata or the third metadata.