Apparatus and method for processing audio signals recorded on a medium

Abstract

This invention relates to a karaoke CD format and a device for controlling audio signals utilizing the karaoke CD format which provides a user with selective reproduction of the voice of a player. The karaoke CD format includes a CD format divided into video sectors and audio sectors. The audio sectors are further divided into a part for recording accompaniment sound and playing sound at the same time and a part for recording accompaniment sound only. There is provided record coding information for distinguishing the parts.An apparatus, method and storage medium for processing digital data are discussed. According to an embodiment, the apparatus includes an audio/video data processor to receive data units of digital audio data and data units of digital video data, the data units of digital audio data being multiplexed with data units of digital video data, the data units of digital audio data corresponding to at least one of: 1) a first type of digital audio data, and 2 ) a second type of digital audio data which includes at least one content different from the first type of digital audio data; each type of digital audio data being specified by attribute information, which has: a ) first information for indicating a coding mode of the digital audio data, and b ) second information, different than the first information, for identifying one of the first type of digital audio data and the second type of digital audio data, and the digital video data associated with two types of digital audio data.

1. A device for reproducing a digital signal recorded on a medium, the digital signal including a video signal and an audio signal, the audio signal being composed of data units, the data units corresponding to at least one of:
 1) a first type of digital audio data, and    2) a second type of digital audio data which includes at least one content different from the first type of digital audio data;    each data unit including attribute information, which has: 
 a) first information indicating a coding mode of the digital audio data, and  
 b) second information, different than said first information, identifying the data unit as one of the first type of digital audio data or the second type of digital audio data;  
 the data units of audio signal being interleaved between data units of video signal, comprising: 
 a demodulator for demodulating the digital signal to restore an original signal;  
 a signal processor for receiving the audio signal, demodulated by the demodulator, extracting the second information, separating the data units corresponding to a first type of audio signal from data units corresponding to a second type of audio signal based on the extracted second information, said signal processor including a system time clock, a memory for storing the data units corresponding to the first type and the second type of audio signal, and first or second audio presentation parts receiving the system time clock to control a presentation timing of the first type or the second type of audio signal; and  
 a controller, coupled to the signal processor, controlling the signal processor to output the data units corresponding to the first type or the second type of the audio signal designated by a user input, wherein the first or second type of audio signal, designated by the user input, is identified using the second information.  
 
   
     
     
       2. A device as claimed in  claim 1 , wherein the first type of audio signal corresponds to accompaniment sound. 
     
     
       3. A device as claimed in  claim 1 , wherein the audio signal is encoded by an MPEG coding mode, wherein the signal processor further comprises:
 an MPEG audio decoder for decoding the audio signal.    
     
     
       4. A method for reproducing a digital signal recorded on a medium, said digital signal including a video signal and an audio signal, the audio signal being composed of data units, the data units corresponding to at least one of:
 1) a first type of digital audio data, and    2) a second type of digital audio data which includes at least one content different from the first type of digital audio data;     each data unit including attribute information, which has: 
 a) first information indicating a coding mode of the digital audio data, and  
 b) second information, different than said first information, identifying the data unit as one of the first type of digital audio data or the second type of digital audio data;  
  the data units of audio signal being interleaved between data units of video signal, the method comprising the steps of: 
 demodulating the digital signal to restore an original signal;  
 receiving the demodulated audio signal;  
 extracting the second information;  
 separating the data units corresponding to a first type of audio signal from data units corresponding to a second type of audio signal based on the extracted second information, by storing the first and second types of audio signals in a memory, receiving the data units corresponding to the first and second types of audio signals in first and second audio presentation parts along with a system time clock to control a presentation timing of the first or second type of audio signal; and  
 outputting one of the first or second types of audio signals in response to a user input designating one of the first or second types of audio signals, wherein the first or second type of audio signal, designated by the user input, is identified using the second information.  
 
   
     
     
       5. The method of  claim 4 , wherein the step of separating includes separating the first type of the audio signal representing accompaniment sound. 
     
     
       6. A device for processing a digital signal, comprising:
 an audio signal processor receiving data units of digital audio data, the data units corresponding to at least one of: 
 1) a first type of digital audio data, and  
 2) a second type of digital audio data which includes at least one content different from the first type of digital audio data;  
  each data unit including attribute information, which has: 
 a) coding information indicating a coding mode of the digital audio data, and  
 b) identification information, different than said coding information, identifying the data unit as one of the first type of digital audio data or the second type of digital audio data;  
 
   the audio signal processor extracting the identification information, and separating the data units of the first type from the data units of the second type using the identification information, said signal processor including a system time clock, a memory for storing the data units of the first type and the second type, and first and second audio presentation parts receiving the system time clock to control a presentation timing of the data units of the first type or the second type; and 
 a control circuit controlling the audio signal processor to output an audio signal corresponding to the data units of one of the first or second types, based on the identification information.  
   
     
     
       7. The device of  claim 6 , wherein the audio data of the first type includes accompaniment sound. 
     
     
       8. The device of  claim 6 , wherein the data units of digital audio data are interleaved with digital video data, and wherein the audio data of the first type includes accompaniment sound and vocals, which are associated with the digital video data. 
     
     
       9. The device of  claim 6 , wherein the audio signal processor compares the system time clock to timing information in the digital audio data, and outputs audio data with a timing based on the comparison. 
     
     
       10. The device of  claim 6 , wherein the audio signal processor MPEG decodes the audio data. 
     
     
       11. The device of  claim 6 , further comprising: a demodulator demodulating the digital audio data prior to receipt by the audio signal processor. 
     
     
       12. A method for processing a digital signal, comprising:
 receiving data units of digital audio data, the data units corresponding to at least one of: 
 1) a first type of digital audio data, and  
 2)a second type of digital audio data which includes at least one content different from the first type of digital audio data;  
  each data unit including attribute information, which has: 
 a) coding information indicating a coding mode of the digital audio data, and  
 b) identification information, different than said coding information, identifying the data unit as one of the first type of digital audio data or the second type of digital audio data;  
 extracting the identification information;  
 separating the data units of the first type from the data units of the second type using the identification information by storing the data units of the first and second types in a memory, receiving the data units of the first and second types in first or second audio presentation parts along with a system time clock to control a presentation timing of data units of the first or second type; and  
 outputting audio data corresponding to the data units of the first or second type in response to the identification information.  
 
   
     
     
       13. The method of  claim 12 , wherein the audio data of the first type includes accompaniment sound. 
     
     
       14. The method of  claim 12 , wherein the data units of digital audio data are interleaved with digital video data, and wherein the audio data of the first type includes accompaniment sound and vocals, which are associated with the digital video data. 
     
     
       15. The method of  claim 12 , further comprising: comparing the system time clock to timing information in the digital audio data; and outputting the audio data with a timing based on the comparison. 
     
     
       16. The device of  claim 12 , wherein the separating step includes MPEG decoding the audio data. 
     
     
       17. The device of  claim 1 , wherein the signal processor includes a switch that selectively outputs the data units of the first type or the second type. 
     
     
       18. An apparatus for processing a digital data, comprising:
   an audio/video data processor to receive data units of digital audio data and data units of digital video data, the data units of digital audio data being multiplexed with data units of digital video data, the data units of digital audio data corresponding to at least one of:        1   )  a first type of digial audio data, and          2   )  a second type of digital audio data which includes at least one content different from the first type of digital audio data;        each type of digital audio data being specified by attribute information, which has:      a )  first information for indicating a coding mode of the digital audio data, and        b )  second information, different than said first information, for identifying one of the first type of digital audio data and the second type of digital audio data, and        the digital video data being associated with two types of digital audio data,        the audio/video data processor including an audio data processor configured to process the first or second types of digital audio data and a video data processor configured to process the digital video data, wherein the audio processor is configured to extract the second information included in the digital audio data, separate the first type of digital audio data from the second type of digital audio data using the second information and process at least one of first and second types of digital audio data, and        the audio/video data processor including a system time clock, a data storage to store the first and second types of digital audio data and the digital video data, an audio presentation part to receive the system clock to control a presentation timing of the first or second types of digital audio data and a video presentation part to receive the system time clock to control a presentation timing of the digital video data; and        a control circuit, coupled to the audio/video data processor, to output an audio signal corresponding to the first or second types of digital audio data and the digital video data.          
     
     
       19. The apparatus of  claim 18 , wherein the audio/video data processor further includes:
   a demultiplexer to separate the first type of digital audio data from the second type of digital audio data, by the second information.      
     
     
       20. The apparatus of  claim 19 , wherein the demultiplexer is further configured to separate the digital audio data from the digital video data, by using the first information.  
     
     
       21. The apparatus of  claim 18 , wherein the audio data processor is configured to compare the system time clock to a presentation time information included in the digital audio data and output the first or second types of digital audio data with a timing based on the comparison, and
   the video data processor is configured to compare the system time clock to a presentation time information included in the digital video data and output the digital video data with a timing based on the comparison.      
     
     
       22. The apparatus of  claim 18 , wherein the audio/video data processor is further configured to identify a coding mode of the digital video data based on a coding mode information, the coding mode for indicating MPEG video data, and wherein the video data processor comprises an MPEG video decoder configured to decode the digital video data encoded in MPEG format.  
     
     
       23. The apparatus of  claim 22 , wherein the audio/video data processor is further configured to identify the coding mode of the first or second types of digital audio data based on the first information, the coding mode for indicating MPEG audio data, and wherein the audio data processor comprises an MPEG audio decoder configured to decode the digital audio data encoded in MPEG format.  
     
     
       24. The apparatus of  claim 18 , further comprising:
   a demodulator to demodulate the digital audio data and the digital video data to an original data, prior to receipt by the audio/video data processor.      
     
     
       25. The apparatus of  claim 18 , wherein the control circuit is further configured to receive a request for designating one of first and second types of digital audio data, and
   wherein the first or second type of audio data, designated by the request, is identified using the second information.      
     
     
       26. The apparatus of  claim 18 , further comprising:
   a D/A converter coupled to the audio/video data processor to convert at least one of the first and second types of digital audio data and the digital video data to analog signal, respectively.      
     
     
       27. The apparatus of  claim 18 , wherein the at least one of the first and second types of digital audio data includes vocal data, and
   wherein the audio data processor is configured to process the vocal data.      
     
     
       28. A method for processing a digital data, comprising:
   receiving data units of digital audio data and data units of digital video data, the data units of digital audio data being multiplexed with data units of digital video data, the data units of digital audio data corresponding to at least two of:        1   )  a first type of digital audio data, and          2   )  a second type of digital audio data which includes at least one content different from the first type of digital audio data;        each type of digital audio data being specified by attribute information, which has:      a ) first information for indicating a coding mode of the digital audio data, and        b )  second information, different than said first information, for identifying one of the first type of digital audio data and the second type of digital audio data,        the digital video data being associated with two types of digital audio data;        extracting the second information;        separating the first type of digital audio data from the second type of digital audio data using the second information;        processing the first or second types of digital audio data and the digital video data;        controlling a presentation timing of the first or second types of digital audio data and a presentation timing of digital video data in response to a system time clock,          wherein the first or second types of digital audio data is identified by the second information, in response to a designation for selecting one of the first and second types of digital audio data.        
     
     
       29. The method of  claim 28 , further comprising:
   separating the digital audio data from the digital video data, by using the first information.      
     
     
       30. The method of  claim 28 , wherein the controlling step includes synchronizing the presentation timing of the digital audio data to the system time clock and outputting the first or second types of digital audio data with a timing, and
   synchronizing the presentation timing of the digital audio data to the system time clock and outputting the digital video data with a timing.      
     
     
       31. The method of  claim 28 , further comprising:
   identifying a coding mode of digital video data based on a mode information included in the digital video data, the coding mode for indicating MPEG video data, and        wherein the processing step includes decoding the digital video data encoded in MPEG format.      
     
     
       32. The method of  claim 31 , further comprising:
   identifying the coding mode of the first or second types of digital audio data based on the first information, the coding mode for indicating MPEG audio data, and        wherein the processing step includes decoding the digital audio data encoded in MPEG format.      
     
     
       33. The method of  claim 28 , further comprising:
   demodulating the digital audio data and the digital video data to an original data, prior to receipt by the receiving step.      
     
     
       34. The method of  claim 28 , further comprising:
   converting the designated first or second types of digital audio data and the digital video data to analog signal, respectively.      
     
     
       35. The method of  claim 28 , wherein the at least one of the first and second types of digital audio data includes vocal data, and
   wherein the processing step processes the vocal data.