Encrypted data reproducing transmitting and processing method and apparatus with separately encrypted control data

A data reproducing apparatus for reproducing audio visual data, comprising:

• reproducing means for reproducing first and second data recorded on a recording medium;
• encryption means for encrypting the first data reproduced by said reproducing means comprising medium-type information in accordance with a first encryption processing and for encrypting the second data reproduced by said reproducing means, comprising copyright control information relevant at least to copyright control processing of said audio visual data, in accordance with a superimposing watermark process;
• transmission means for transmitting said first and second data encrypted by said encrypting means to an external signal processing device;
• reception means for receiving playback control data transmitted from said external signal processing device, said playback control data comprising said data transmitted by said transmission means encrypted in a manner different from said encrypting by said encrypting means and processed with copyright control processing;
• decrypting means for performing decryption processing matched to encryption of said playback control data received by said reception means;
• and
• control means for controlling the playback processing of said reproducing means based on said playback control data decrypted by said decrypting means.

A data processing apparatus for reproducing audio visual data, comprising:

• reception means for receiving first data processed in accordance with first encryption processing and second data superimposed on said audio visual data in accordance with watermark processing different from said first encryption processing, comprising copyright control information at least relevant to copyright control processing of said audio visual data, said first and second data being transmitted from an external device;
• first decrypting means for performing first decryption processing, matched to said first encryption processing, on said first data received by said reception means, said first data comprising media-type information;
• second decrypting means for performing second decryption processing, matched to said watermark processing, on said second data received by said reception means;
• outputting means for outputting data decrypted by said second decrypting means;
• and
• control means for performing copyright control processing of said data output by said outputting means, based on at least the first data decrypted by the first decryption means and the second data, comprising copyright control information, decrypted by said second decrypting means, for controlling outputting processing of said outputting means.

A data processing apparatus for reproducing audio visual data, comprising:

• reception means for receiving first data comprising medium-type information and second data, comprising copyright control information at least relevant to copyright control processing of said audio visual data, said first data being encrypted in accordance with a first encryption process and the second data being superimposed on said audio visual data in accordance with watermark processing, said first and second data being transmitted in this encrypted form from an external device;
• decrypting means for performing matched decryption processing on said first data and said second data received by said reception means;
• outputting means for outputting data decrypted by said decrypting means;
• control means for performing copyright control processing of said data output by said outputting means, based on at least the first data and second data decrypted by said decrypting means, for generating transmission control data for controlling transmission processing of said data transmitted from said external device;
• encrypting means for performing encryption processing on said transmission control data generated by said control means, said encryption processing being different from that performed on the first and second data received by said reception means;
• and
• transmitting means for transmitting the transmission control data encrypted by said encrypting means to said external device.

A data transmission system comprising a data reproducing apparatus and a data processing apparatus, in which audio visual data reproduced from a recording medium by said data reproducing apparatus is transmitted to said data processing apparatus, the transmitted data being processed in a predetermined manner by said data processing apparatus and in which the processed data is then output,

• said data reproducing apparatus including reproducing means for reproducing first and second data recorded on a recording medium, first encryption means for performing first encryption processing on said first data reproduced from said recording medium by said reproducing means, said first data comprising medium-type information, second encryption means for performing second encryption processing different from said first encryption processing on said second data reproduced from said recording medium by said reproducing means, said second data comprising copyright control information, and said second encryption processing comprising watermark processing to superimpose said second data on said audio visual data, and transmission means for transmitting the data encrypted by said first encryption means and the second encryption means;
• said data processing apparatus including reception means for receiving first data processed with said first encryption processing and second data superimposed on said audio visual data in accordance with said watermark processing different from said first encryption processing, comprising copyright control information at least relevant to copyright control processing of said audio visual data, said first and second data being transmitted from an external device, first decrypting means for performing first decryption processing, matched to said first encryption processing, on said first data received by said reception means, second decrypting means for performing second decryption processing, matched to said watermark processing, on said second data received by said reception means, outputting means for outputting data decrypted by said second decrypting means, and control means for performing copyright control processing of said data output by said outputting means, based on at least the first data decrypted by the first decryption means and the second data, comprising copyright control information decrypted by said second decrypting means, for controlling outputting processing of said outputting means.

A data transmission system comprising a data reproducing apparatus and a data processing apparatus, in which audio visual data reproduced from a recording medium by said data reproducing apparatus is transmitted to said data processing apparatus, the transmitted audio visual data is processed in a predetermined manner by said data processing apparatus, and in which the processed audio visual data is output,

• said data reproducing apparatus including reproducing means for reproducing first and second data recorded on a recording medium, encryption means for encrypting, in accordance with a first encryption processing, the first data comprising media-type information reproduced by said reproducing means and for encrypting the second data reproduced by said reproducing means in accordance with a superimposing processing, said second data comprising copyright control information relevant to at least copyright control processing of said audio visual data, transmission means for transmitting said first and second data encrypted by said encrypting means to an external signal processing device, reception means for receiving playback control data transmitted from said external signal processing device, said playback control data being said data transmitted by said transmission means, said transmitted data being processed with copyright control processing, decrypting means for performing decryption processing matched to the encryption of said playback control data received by said reception means, and control means for controlling the playback processing of said reproducing means based on said playback control data decrypted by said decrypting means;
• said data processing device including reception means for receiving said first data comprising media-type information and said second data, comprising copyright control information relevant to at least copyright control processing of said audio visual data, said first data being encrypted in accordance with a first encryption process and the second data being superimposed on said audio visual data in accordance with watermark processing, said first and second data being transmitted in this encrypted form from an external device, decrypting means for performing matched decryption processing on said first and said second data received by said reception means, outputting means for outputting data decrypted by said decrypting means, control means for performing copyright control processing of said data output by said outputting means, based on at least the first data and the second data decrypted by said decrypting means, for generating transmission control data for controlling the transmission processing of said data transmitted from said external device, encrypting means for performing encryption processing on said transmission control data generated by said control means, said encryption processing being different from the encryption processing performed on the first and second data received by said reception means, and transmitting means for transmitting the transmission control data encrypted by said encrypting means to said external device.

A data reproducing method for reproducing audio visual data comprising the steps of:

• reproducing first and second data recorded on a recording medium;
• performing first encryption processing on the first data reproduced, said first data comprising medium-type information;
• performing second encryption processing, different from said first encryption processing, on said second data, said second data comprising copyright control information, and said second encryption processing comprising watermark processing to superimpose said second data on said audio visual data;
• and
• transmitting the encrypted data and encrypted control data;
• wherein said copyright control information and said medium-type information are used to control copyright control processing.

A data reproducing method for reproducing audio visual data comprising the steps of:

• reproducing first and second data recorded on a recording medium;
• encrypting the reproduced first data comprising medium-type information in accordance with a first encryption processing for encrypting the reproduced second data, comprising copyright and control information relevant to at least the copyright control processing of said audio visual data in accordance with a superimposing watermark process;
• transmitting the encrypted first and second data to an external signal processing device;
• receiving playback control data transmitted from said external signal processing device, said playback control data comprising the data transmitted to said external signal processing device following copyright control processing and subsequent encryption processing different from the prior encryption processing performed on said control data;
• performing decryption processing on the received playback control data matched to the encryption processing for the received playback control data;
• and
• controlling the playback processing based on the decrypted playback control data.

A data reproducing method for reproducing audio visual data comprising the steps of:

• reproducing first and second data from a storage device;
• performing first encryption processing on the reproduced first data comprising medium-type information;
• performing second encryption processing, different from said first encryption processing, on the reproduced second data, comprising copyright control information relevant to copyright control processing of the reproduced audio visual data;
• and
• receiving playback control data subjected to encryption processing different from both the first encryption processing and the second encryption processing.

A data processing method for reproducing audio visual data comprising the steps of:

• receiving first data subjected to first encryption processing and second data superimposed on said audio visual data in accordance with watermark processing different from said first encryption processing, comprising copyright control information at least relevant to copyright control processing of said audio visual data, said first and second data being transmitted from an external device;
• performing first decryption processing matched to said first encryption processing on the received first data, said first data comprising medium-type information;
• performing second decryption processing matched to said watermark processing on the received second data;
• performing at least copyright control processing of said audio visual data based on said first and second data;
• and
• outputting the audio visual data in accordance with said copyright control processing.

A data processing method for reproducing audio visual data comprising the steps of:

• receiving first data comprising medium-type information and second data, comprising copyright control information at least relevant to copyright control processing of said audio visual data, said first data being encrypted in accordance with a first encryption processing and the second data being superimposed on said audio visual data in accordance with watermark processing, said first and second data being transmitted in this encrypted form from an external device;
• performing matched decryption processing on the received first data and second data;
• outputting the decrypted data;
• performing copyright control processing on said output data, based at least in part on the decrypted first and second data, to generate transmission control data for controlling transmission of data from said external device;
• performing encryption processing, different from that performed on the first and second data, on the generated transmission control data;
• and
• transmitting the encrypted transmission control data to said external device.

A data transmission method in which a transmitting side transmits audio visual data reproduced from a recording medium via a transmission medium and in which a reception side performs pre-set processing on transmitted audio visual data to output the processed audio visual data, wherein

• the transmitting side reproduces first and second data recorded on the recording medium, said first data comprising medium-type information, processes the reproduced first data with first encryption, processes the reproduced second data with second encryption different from said first encryption, said second data comprising copyright control information, and said second encryption processing comprising watermark processing to superimpose said second data on said audio visual data, and transmits the encrypted first and second data over a transmission medium;
• the reception side receives the transmitted first data and second data superimposed on said audio visual data, performs first decryption processing matched to said first encryption processing on the received first data, performs second decryption processing matched to said second encryption processing on the received second data, the decrypted first and second data being output, and copyright control processing for the output data being performed based on at least the copyright control information subjected to said second decryption processing.

A data transmission method in which a transmitting side transmits audio visual data reproduced from a recording medium via a transmission medium and in which a reception side performs pre-set processing on transmitted audio visual data to output the processed audio visual data, wherein

• the transmitting side reproduces first and second data recorded on the recording medium, processes the reproduced first data in accordance with a first encryption processing, said first data comprising medium-type information and processing the reproduced second data in accordance with a superimposing process, said second data comprising copyright and control information relevant to at least copyright control processing of said audio visual data, transmits the encrypted first and second data over a transmission medium to the reception side, receives encrypted playback control data, performs decryption processing matched to encryption processing of the received playback control data, and controls playback processing based on the decrypted playback control data;
• and wherein
• the reception side receives the transmitted first and second data, performs matched decryption processing on the received first and second data, outputs the decrypted data, performs copyright control processing of said output data based on at least the decrypted first and second data, generates transmission control data for controlling the transmission of data from the transmitting side, performs decryption processing on the generated transmission control data different from that performed on the received first and second data, and transmits the encrypted transmission control data to the transmitting side.