Transmission apparatus, transmission method, reception apparatus, and reception method
AssigneeSony Corporation
InventorGEN ICHIMURA
Life of this patent
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Abstract
To make high-level copyright protection of transmission audio data possible. Audio data is sequentially transmitted to a reception side via a predetermined transmission channel for each unit audio data. Audio data to be transmitted is encrypted, and encryption information indicating that the audio data has been encrypted is added to the audio data. For example, the encryption information is added using a predetermined bit area of a channel status of each block that is configured every predetermined number of unit audio data pieces.
Claims18
A transmission apparatus, comprising:
- a data transmission unit that sequentially transmits audio data to a reception side via a predetermined transmission channel for each unit audio data;
- an encryption unit that encrypts the audio data transmitted by the data transmission unit;
- and
- an information addition unit that adds, to the audio data transmitted by the data transmission unit, encrypted-state information indicating that the audio data has been encrypted.
A transmission method, comprising the steps of:
- sequentially transmitting, by a data transmission unit, audio data to a reception side via a predetermined transmission channel for each unit audio data;
- encrypting audio data transmitted in the data transmission step;
- and
- adding, to the audio data transmitted in the data transmission step, encrypted-state information indicating that the audio data has been encrypted.
A reception apparatus, comprising:
- a data reception unit that sequentially receives audio data transmitted from a transmission side via a predetermined transmission channel for each unit audio data,
- the audio data received by the data reception unit being encrypted,
- the audio data received by the data reception unit having encrypted-state information indicating that the audio data has been encrypted added thereto;
- and
- a decoding unit that carries out decode processing on the audio data received by the data reception unit based on the encrypted-state information.
A reception method, comprising the steps of:
- sequentially receiving, by a data reception unit, audio data transmitted from a transmission side via a predetermined transmission channel for each unit audio data,
- the audio data received in the data reception step being encrypted,
- the audio data received in the data reception step having encrypted-state information indicating that the audio data has been encrypted added thereto;
- and
- carrying out decode processing on the audio data received in the data reception step based on the encrypted-state information.
Dependencies are inferred from the claim text.