Transmission system
First Claim
1. A transmission system comprising:
- a transmission apparatus for transmitting audio data of multi channels and auxiliary data required for playback of the audio data; and
a receiving apparatus for receiving the audio data and the auxiliary data which are transmitted by the transmission apparatus, wherein the auxiliary data include channel assignment information of the audio data.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention provide a transmission system comprising a transmission apparatus for transmitting audio data of multi channels and auxiliary data required for playback of the audio data, and a receiving apparatus for receiving the audio data and the auxiliary data which are transmitted by the transmission apparatus. A multiplexer of the transmission apparatus creates block data that is composed of 8 frames, and first 1 byte of each frame is allocated to a header having Sync, OE and the like, the second byte is allocated to the auxiliary data including AUX data and copyright protect information, and remaining bytes are used to transmit the audio data. An encryptor carries out an encryption process for the second and later bytes of each frame, and a communication means outputs encrypted data. A communication means of the receiving apparatus receives the encrypted data from the transmission apparatus, a decoder decodes the encrypted data, and a demultiplexer demultiplexes the audio data and the auxiliary data. Therefore, this transmission system transmits multi-channel audio data of the DVD-Audio or the like efficiently on a transmission line using fixed length frames according to the MOST method, and takes measures for copyright protection of audio data.
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Citations
19 Claims
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1. A transmission system comprising:
- a transmission apparatus for transmitting audio data of multi channels and auxiliary data required for playback of the audio data; and
a receiving apparatus for receiving the audio data and the auxiliary data which are transmitted by the transmission apparatus, whereinthe auxiliary data include channel assignment information of the audio data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a transmission apparatus for transmitting audio data of multi channels and auxiliary data required for playback of the audio data; and
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9. A transmission system comprising a transmission apparatus for transmitting digital data and auxiliary data required for playback of the digital data;
- and a receiving apparatus for receiving the digital data and the auxiliary data which are transmitted from the transmission apparatus, wherein
the transmission apparatus comprises;
a multiplexer for multiplexing the digital data and the auxiliary data, to create block data which is composed of n frames as a multiple of a predetermined encryption unit; and
an encryptor for encrypting the block data in the predetermined encryption unit, to create encrypted data, and the receiving apparatus comprises;
a decoder for decoding the encrypted data transmitted from the transmission apparatus; and
a demultiplexer for demultiplexing the block data decoded by the decoder into digital data and auxiliary data. - View Dependent Claims (10, 11, 12, 13, 14, 15, 17, 19)
- and a receiving apparatus for receiving the digital data and the auxiliary data which are transmitted from the transmission apparatus, wherein
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16. A transmission apparatus which receives audio data and copyright protect information that is information for protecting copyright of the audio data, and generates a periodic signal with eight transmission frames as one cycle, comprising:
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a first multiplexer means for multiplexing the copyright protect information in synchronization with the periodic signal;
an encryptor means for performing encryption in synchronization with the periodic signal; and
a second multiplexer means for multiplexing periodic information indicating information of the periodic signal in synchronization with the periodic signal.
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18. A receiving apparatus which receives audio data and copyright protect information, from a transmission apparatus which receives the audio data and the copyright protect information that is information for protecting copyright of the audio data and generates a periodic signal with eight transmission frames as one cycle, comprising:
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a first demultiplexer means for generating a periodic signal on the basis of periodic information as information of the periodic signal detected from the received data;
a decoder means for performing decoding in synchronization with the periodic signal; and
a second demultiplexer means for demultiplexing the copyright protect information in synchronization with the periodic signal.
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Specification