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 reproducing a digital data, are discussed. According to an embodiment, the apparatus includes a demodulator configured to demodulate digital audio data to restore an original data; a data processor configured to receive the digital audio data demodulated by the demodulator, and process at least one of first and second types of digital audio data, the data processor including a system time clock, a memory configured to store the first and second types of digital audio data, and an audio presentation part configured to receive the system time clock to control a presentation timing of the first or second types of digital audio data; and a controller, coupled to the data processor, configured to control the data processor to output the first or second types of the digital audio data in response to the second information.

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 reproducing a digital data, the digital data including an audio data, the audio data being composed of data units, and 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 data unit of digital audio data including 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 the data unit as one of the first type of digital audio data or the second type of digital audio data,        
       
         the apparatus comprising:  
         
           a demodulator configured to demodulate the digital audio data to restore an original data;  
         
         
           a data processor configured to receive the digital audio data demodulated by the demodulator, and process at least one of first and second types of digital audio data, said data processor including a system time clock, a memory configured to store the first and second types of digital audio data, and an audio presentation part configured to receive the system time clock to control a presentation timing of the first or second types of digital audio data; and  
         
         
           a controller, coupled to the data processor, configured to control the data processor to output the first or second types of the digital audio data in response to the second information.  
         
       
     
     
       19. The apparatus of  claim 18 , wherein the controller 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.      
     
     
       20. The apparatus of  claim 18 , wherein the data processor further includes a demultiplexer configured to separate the data units corresponding to the first type of digital audio data from the data units corresponding to the second type of digital audio data based on the second information.  
     
     
       21. The apparatus of  claim 20 , wherein the demultiplexer is further configured to separate time information from a signal demodulated by the demodulator, the time information being used for the system time clock.  
     
     
       22. The apparatus of  claim 18 , wherein the controller is further configured to identify the coding mode of the digital audio data based on the first information, the coding mode for indicating an MPEG coding mode, and
   wherein the data processor further comprises an MPEG audio decoder configured to decode the compressed audio data, according to a control of the controller.      
     
     
       23. The apparatus of  claim 18 , further comprising:
   a D/A converter coupled to the data processor to convert at least one of the first and second types of digital audio data to analog signal.      
     
     
       24. The apparatus of  claim 18 , wherein the data processor is configured to compare the system time clock to a presentation time information in the digital audio data and output audio data with the timing based on the comparison.  
     
     
       25. The apparatus of  claim 18 , wherein the demodulator is configured to covert n bits data to m bits data, where n>m.  
     
     
       26. 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 data processor is configured to process the vocal data.      
     
     
       27. The apparatus of  claim 18 , wherein the digital audio data is read from an optical recording medium, and wherein the demodulator is configured to demodulate the digital audio data recorded in the optical recording medium to the original data.  
     
     
       28. A method of reproducing a digital data, said digital data including an audio data, the audio data being composed of data units, and the data units 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 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 method comprising:  
         
           demodulating the digital audio data to restore an original signal;  
         
         
           storing the first and second types of digital audio data, demodulated by the demodulating step, in a memory;  
         
         
           separating the data units corresponding to the first type of digital audio data from the data units corresponding to the second type of digital audio data, based on the second information;  
         
         
           processing at least one of the data units corresponding to the first or second types of digital audio data; and  
         
         
           controlling a presentation timing of the first or second types of digital audio data in response to a system time clock, wherein the controlling step includes controlling of an output one of the first or second types of digital audio data in response to a request for designating one of the first or second types of audio data, wherein the first or second type of digital audio data, designated by the request, is identified using the second information.  
         
       
     
     
       29. The method of  claim 28 , wherein the controlling step includes comparing the system time clock with a presentation time information included in the data unit of first or second types of digital audio data and outputting the first or second types of digital audio data with the timing based on the comparison.  
     
     
       30. The method of  claim 29 , further comprising:
   extracting the reference time information and the presentation time information from the data unit of digital audio data, the reference time information being used for the system time clock, and the comparing step compares the system time clock and the extracted presentation time information.      
     
     
       31. The method of  claim 28 , further comprising:
   identifying the coding mode of digital audio data based on the first information.      
     
     
       32. The method of  claim 31 , wherein the first information indicates MPEG coding mode, and wherein the processing step includes decoding the first or second types of digital audio data compressed by the MPEG coding mode. 
     
     
       33. 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 includes processing the vocal data.      
     
     
       34. The method of  claim 28 , wherein the demodulating step coverts n bits data to m bits data, where n>m.  
     
     
       35. The method of  claim 28 , further comprising:
   converting at least one of the first and second types of digital audio data to analog signal to output an analog audio signal.      
     
     
       36. The method of  claim 28 , wherein the digital audio data is read from an optical recording medium, and wherein the demodulating step demodulates the digital audio data recorded in the optical recording medium to the original data.  
     
     
       37. An apparatus for processing a digital data, the digital data including an audio data, comprising:
   a receiving portion configured to receive digital audio data, the digital audio data being composed of data units, and 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 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 or the second type of digital audio data;          a demodulator configured to demodulate the digital audio data to restore an original data;        a memory configured to store the first and second types of digital audio data demodulated by the demodulator;        an audio data processing circuit, coupled to the memory, configured to receive at least one of first and second types of digital audio data stored in the memory, and to process at least one of first and second types of digital audio data, the audio data processing circuit including an audio presentation part configured to receive a system time clock to control a presentation timing of the first or second types of digital audio data; and        a controller, coupled to the audio data processing circuit, configured to control an output of the first or second types of the digital audio data in response to the second information.      
     
     
       38. The apparatus of  claim 37 , wherein the controller 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.      
     
     
       39. The apparatus of  claim 37 , wherein the audio data processing circuit further includes a demultiplexer configured to separate the data units corresponding to the first type of digital audio data from the data units corresponding to the second type of digital audio data based on the second information.  
     
     
       40. The apparatus of  claim 39 , wherein the demultiplexer is further configured to separate a reference time information from a signal demodulated by the demodulator, the reference time information being used for the system time clock and the system time clock for synchronizing the presentation timing.  
     
     
       41. The apparatus of  claim 37 , wherein the controller is further configured to identify the coding mode of the digital audio data, the coding mode for indicating MPEG coding mode, and wherein the audio data processing circuit further comprises an MPEG audio decoder configured to decode the compressed MPEG audio data, according to a control of the controller.  
     
     
       42. The apparatus of  claim 37 , further comprising:
   a D/A converter coupled to the audio data processing circuit to convert at least one of the first and second types of digital audio data to analog signal.      
     
     
       43. The apparatus of  claim 37 , wherein the audio data processing circuit is configured to compare the system time information to a presentation time information in the digital audio data and output audio data with a timing based on the comparison.  
     
     
       44. The apparatus of  claim 37 , wherein the demodulator is configured to covert n bits data to m bits data, where n>m.  
     
     
       45. The apparatus of  claim 37 , 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.      
     
     
       46. A method of processing a digital data, said digital data including an audio data, comprising:
   receiving the digital audio data, the digital audio data being composed of data units, and the data units 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 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;          demodulating the digital audio data to restore an original signal;        storing the first and second types of digital audio data, demodulated by the demodulating step, in a memory;        processing at least one of the data units corresponding to the first type of digital audio data and the data units corresponding to the second type of digital audio data, each of data units identified based on the second information; and        controlling a presentation timing of the first or second types of digital audio data in response to a system time clock.      
     
     
       47. The method of  claim 46 , further comprising:
   receiving a request for designating one of the first or second types of audio data, wherein the first or second type of digital audio data, designated by the request, is identified using the second information, and        wherein the controlling step controls the output of the designated first or second types of digital audio data.      
     
     
       48. The method of  claim 46 , wherein the controlling step includes comparing the system time clock with a presentation time information included in the data unit of first or second types of digital audio data and outputting the first or second types of digital audio data with the timing based on the comparison.  
     
     
       49. The method of  claim 48 , further comprising:
   extracting a reference time information from the data unit of digital audio data, the reference time information being used for the system time clock.      
     
     
       50. The method of  claim 46 , wherein the controlling step includes identifying the coding mode of the first or second types of digital audio data based on the first information, and wherein the processing step includes decoding the first or second types of digital audio data compressed by the MPEG coding mode.  
     
     
       51. The method of  claim 46 , further comprising:
   separating the data units corresponding to the first type of digital audio data from the data units corresponding to the second type of digital audio data, using the second information, and wherein the processing step processes at least one of first type of digital audio data and second type of digital audio data, separated in the separating step.      
     
     
       52. The method of  claim 46 , wherein the at least one of the first and second types of digital audio data includes vocal data, and
   wherein the processing step includes processing the vocal data.      
     
     
       53. The method of  claim 46 , wherein the demodulating step coverts n bits data to m bits data, where n>m.  
     
     
       54. The method of  claim 46 , further comprising:
   converting at least one of the first and second types of digital audio data to analog signal to output an analog audio signal.      
     
     
       55. A computer readable storage medium on which digital audio data is recorded, the digital audio data comprising data units 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 data unit including attribute information, which has:      a )  first information indicating a coding mode of the digital audio data,        b )  second information, different than said first information, for identifying the first type of digital audio data or the second type of digital audio data,        wherein the second information is used for separating the data units of the first type from the data units of the second type stored in a memory and selectively outputting audio signal corresponding to the data units of the first or second types, and        c )  a time information including a reference time information for controlling a presentation timing of the first or second types of digital audio data, the reference time information being used for generating a system time clock and the system time clock being used for synchronizing the presentation timing, and a presentation time information for defining the presentation timing of the first or second types of digital audio data.        
     
     
       56. The computer readable storage medium of  claim 55 , wherein the data unit corresponds to a pack or packet to be multiplexed.  
     
     
       57. The computer readable storage medium of  claim 56 , wherein the attribute information is included in a header of the pack or packet.  
     
     
       58. The computer readable storage medium of  claim 55 , wherein the first and the second types of digital audio data are multiplexed with digital video data.  
     
     
       59. The computer readable storage medium of  claim 55 , wherein the reference time information corresponds to SCR ( System Clock Reference )  and the presentation time information corresponds to PTS  ( Presentation Time Stamp ) .    
     
     
       60. The computer readable storage medium of  claim 55 , wherein at least one of first and second types of digital audio data includes vocal sound.  
     
     
       61. The computer readable storage medium of  claim 55 , wherein the first information is used for decoding the first and second types of digital audio data in response to the coding mode identified by the first information.  
     
     
       62. The computer readable storage medium of  claim 61 , wherein the first information indicates that a coding mode is a MPEG format.