Transmission apparatus, transmission method, reception apparatus, and reception method for transmitting and receiving an audio signal including a mixed signal simultaneously transmitted by mixing a compressed audio signal and a linear pulse code modulation signal

A transmission method comprising:

• a process of sequentially transmitting an audio signal of a predetermined unit via a predetermined transmission line to a reception side,
• wherein the audio signal of the predetermined unit includes a mixed signal simultaneously transmitted by mixing a compressed audio signal and a linear pulse code modulation (PCM) signal in each sub-frame of a plurality of sub-frames within at least one frame of the audio signal,
• wherein, following a preamble provided in each sub-frame, the compressed audio signal is arranged on an upper-order bit side, and the linear PCM signal is arranged on a lower-order bit side,
• wherein identification information is added using a predetermined bit area of a channel status of each block that is configured for a predetermined number of the predetermined units, the identification information indicating that the audio signal of the predetermined unit includes the compressed audio signal and the linear PCM signal, and
• wherein, in each sub-frame, the compressed audio signal is arranged on the upper-order bit side within 16 bits assigned to an area from a 12th bit to a 27th bit of the sub-frame and the linear PCM signal is arranged on the lower-order bit side within 8 bits assigned to an area from a 4th bit to an 11th bit of the sub-frame.

A reception apparatus comprising:

• a reception unit configured to sequentially receive an audio signal of a predetermined unit via a predetermined transmission line from a transmission side,
• wherein the audio signal of the predetermined unit includes a mixed signal simultaneously received by mixing a compressed audio signal and a linear pulse code modulation (PCM) signal in each sub-frame of a plurality of sub-frames within at least one frame of the audio signal,
• wherein, following a preamble provided in each sub-frame, the compressed audio signal is arranged on an upper-order bit side, and the linear PCM signal is arranged on a lower-order bit side,
• wherein identification information is added using a predetermined bit area of a channel status of each block that is configured for a predetermined number of the predetermined units, the identification information indicating that the audio signal of the predetermined unit includes the compressed audio signal and the linear PCM signal,
• wherein, in each sub-frame, the compressed audio signal is arranged on the upper-order bit side within 16 bits assigned to an area from a 12th bit to a 27th bit of the sub-frame and the linear PCM signal is arranged on the lower-order bit side within 8 bits assigned to an area from a 4th bit to an 11th bit of the sub-frame, and
• wherein the reception unit is implemented via at least one processor.

A transmission apparatus comprising:

• a transmission unit configured to sequentially transmit an audio signal of a predetermined unit via a predetermined transmission line to a reception side,
• wherein the audio signal of the predetermined unit includes a mixed signal simultaneously transmitted by mixing a compressed audio signal and a linear pulse code modulation (PCM) signal in each sub-frame of a plurality of sub-frames within at least one frame of the audio signal,
• wherein, following a preamble provided in each sub-frame, the compressed audio signal is arranged on an upper-order bit side, and the linear PCM signal is arranged on a lower-order bit side,
• wherein identification information is added using a predetermined bit area of a channel status of each block that is configured for a predetermined number of the predetermined units, the identification information indicating that the audio signal of the predetermined unit includes the compressed audio signal and the linear PCM signal,
• wherein, in each sub-frame, the compressed audio signal is arranged on the upper-order bit side within 16 bits assigned to an area from a 12th bit to a 27th bit of the sub-frame and the linear PCM signal is arranged on the lower-order bit side within 8 bits assigned to an area from a 4th bit to an 11th bit of the sub-frame, and
• wherein the transmission unit is implemented via at least one processor.