Data output method and apparatus, data playback method and apparatus, data recording method and apparatus, and data recording and playback method and apparatus

Abstract

A method of outputting data read from a recording medium includes decoding data read from a recording medium, embedding electronic watermark information in the decoded data when the decoded data is output as recording data, and outputting the resulting data.

1 - 95 . (canceled)  
   
   
       96 . A data recording method comprising the steps of: 
 determining whether electronic watermark information is detected from received data;    when the electronic watermark information is detected, executing a recording operation of the received data according to the detected electronic watermark information; and    when the electronic watermark information is not detected, canceling the recording operation of the received data.    
   
   
       97 . The method according to  claim 96 , further comprising the steps of, when the electronic watermark information is detected, decoding the detected electronic watermark information, and controlling the recording of the received data according to a result of the decoding.  
   
   
       98 . The method according to  claim 97 , further comprising the step of recording the received data when the decoded electronic watermark information indicates first-generation-recording is allowed.  
   
   
       99 . The method according to  claim 98 , further comprising the step of canceling the recording of the received data when the decoded electronic watermark information indicates recording is prohibited.  
   
   
       100 . The method according to  claim 96 , further comprising the step of determining whether the received data is analog or digital.  
   
   
       101 . The method according to  claim 100 , further comprising the step of determining whether electronic watermark information for analog data is detected from the received data when it is determined that the received data is analog.  
   
   
       102 . The method according to  claim 101 , further comprising the steps of, decoding the detected electronic watermark information for analog data when the electronic watermark information for analog data is detected and recording the received data when the decoded electronic watermark information for analog data indicates first-generation-recording is allowed.  
   
   
       103 . The method according to  claim 102 , further comprising the step of canceling the recording of the received data when the decoded electronic watermark information for analog data indicates recording is prohibited.  
   
   
       104 . The method according to  claim 100 , further comprising the step of determining whether electronic watermark information for digital data is detected from the received data when the received data is digital.  
   
   
       105 . The method according to  claim 104 , further comprising the steps of, decoding the detected electronic watermark information for digital data when it is determined that the electronic watermark information for digital data is detected and recording the received data when the decoded electronic watermark information for digital data indicates first-generation-recording is allowed.  
   
   
       106 . The method according to  claim 105 , further comprising the step of canceling the recording of the received data when the decoded electronic watermark information for digital data indicates recording is prohibited.  
   
   
       107 . A data output method comprising the steps of: 
 determining a type of destination device to which data is output;    determining whether the destination device is capable of transmitting and receiving the data in a secure state;    determining whether the designation device is a recording apparatus when it is determined that the destination device is capable of transmitting and receiving the data in a secure state;    determining copy management information attached to the data when it is determined that the destination device is a recording apparatus; and    embedding electronic watermark information in the data according to the determined copy management information.    
   
   
       108 . The method according to  claim 107 , further comprising the step of embedding electronic watermark information indicating recording is prohibited when the detected copy management information indicates at least first generation recording is allowed.  
   
   
       109 . The method according to  claim 107 , further comprising the steps of encrypting the data and outputting the encrypted data, and not outputting key data for decrypting the encrypted data when the detected copy management information indicates recording is prohibited.  
   
   
       110 . The method according to  claim 107 , further comprising the steps of encrypting the data, and outputting key data for decrypting the encrypted data when it is determined that the destination device is a device capable of transmitting and receiving data in a secure state but is not a recording apparatus.  
   
   
       111 . The method according to  claim 107 , further comprising the steps of encrypting the data and outputting the encrypted data, and not outputting key data for decrypting the encrypted data when the destination device is not a device capable of transmitting and receiving data in a secure state.  
   
   
       112 . The method according to  claim 107 , further comprising the step of determining whether the destination device is capable of transmitting and receiving the data in a secure state by determining whether the destination device is compatible with an IEEE 1394 interface.  
   
   
       113 . A data recording apparatus comprising: 
 a detector for detecting electronic watermark information from received data;    an encoder for encoding the received data; and    a controller for allowing the detected electronic watermark information from said detector to be decoded and for controlling a recording of the data from said encoder according to the decoded electronic watermark information.    
   
   
       114 . The apparatus according to  claim 113 , wherein said controller records the data from said encoder when the electronic watermark information detected by said detector is decoded and indicates first recording is allowed.  
   
   
       115 . The apparatus according to  claim 113 , wherein said controller cancels the recording of the data from said encoder when the electronic watermark information detected by said detector is decoded and indicates recording is prohibited.  
   
   
       116 . The apparatus according to  claim 115 , wherein said controller cancels the recording of the data from said encoder when said detector cannot detect the electronic watermark information.  
   
   
       117 . The apparatus according to  claim 113 , wherein, when the received data is an analog signal, said detector detects electronic watermark information for analog data from the received data.  
   
   
       118 . The apparatus according to  claim 117 , wherein said controller records the data from said encoder when the electronic watermark information for analog data is detected by said detector is decoded and indicates one recording is allowed.  
   
   
       119 . The apparatus according to  claim 113 , wherein said controller cancels the recording of the data from said encoder when the electronic watermark information for analog data is detected by said detector, is decoded and indicates recording is prohibited.  
   
   
       120 . The apparatus according to  claim 117 , wherein said controller cancels the recording of the data from said encoder when the electronic watermark information for analog data is not detected by said detector.  
   
   
       121 . The apparatus according to  claim 113 , wherein, when the received data is a digital signal, said detector detects electronic watermark information for digital data from the received data.  
   
   
       122 . The apparatus according to  claim 121 , wherein said controller records the data from said encoder when the electronic watermark information for digital data is detected by said detector, is decoded and indicates one recording is allowed.  
   
   
       123 . The apparatus according to  claim 121 , wherein said controller cancels the recording of the data from said encoder when the electronic watermark information for digital data is detected by said detector, is decoded and indicates recording is prohibited.  
   
   
       124 . An apparatus according to  claim 121 , wherein said controller cancels the recording of the data from said encoder when the electronic watermark information for digital data is not detected by said detector.