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.A device, method and recording medium for reproducing digital data, are discussed. According to an embodiment, the recording medium includes digital audio data recorded thereon, the digital audio data comprising data units corresponding to at least one of: a first type of digital audio data, and 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 includes supplementary information, which has: a) coding information indicating a coding mode of the digital audio data, b) identification information, different than the coding information, identifying the data unit as one of the first type of digital audio data or the second type of digital audio, and c) time information controlling a presentation timing of data units of the first or second type.

1. A device for reproducing a digital signal  data recorded on a medium, the digital signal  data including a video signal  data and an audio signal  data, the audio signal  data 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 digital audio signal  data being interleaved between data units of digital video signal  data, the device comprising: 
 a demodulator for demodulating  configured to demodulate the digital signal  audio data to restore an original signal;  
 a signal processor for receiving  configured to receive the digital audio signal  data, demodulated by the demodulator, extracting  extract the second information, separating  and separate the data units corresponding to a  the first type of digital audio signal  data from data units corresponding to a  the second type of digital audio signal  data based on the extracted second information, said signal processor including a system time clock, a memory for storing  configured to store the data units corresponding to the first type  and the  second type  types of digital audio signal  data, and first or second  an audio presentation parts receiving  part configured to receive the system time clock to control a presentation timing of the first type  or the  second type  types of digital audio signal  data; and  
 a controller, coupled to the signal processor, controlling  configured to control the signal processor to output the data units corresponding to the first type  or the  second type  types of the digital audio signal  data designated by a user input, wherein the first or second type  types of digital audio signal  data, designated by the user input, is identified using the second information.  
 
 
 
     
     
       2. A device as claimed in  claim 1 , wherein the first type of digital audio signal  data 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  configured to decode the audio signal  data.  
 
     
     
       4. A method for reproducing a digital signal  data recorded on a medium, said digital signal  data including a video signal  data and an audio signal  data, the audio signal  data 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 digital audio signal  data being interleaved between data units of digital video signal  data, the method comprising the steps of : 
 demodulating the digital signal  audio data to restore an original signal;  
 receiving the demodulated audio signal  data;  
 extracting the second information;  
 separating the data units corresponding to a  the first type of digital audio signal  data from the data units corresponding to a  the second type of digital audio signal  based on the extracted second information, by storing the first and second types of digital audio signals  data in a memory, receiving the data units corresponding to the first and  or second types of digital audio signals  data in first and second  an audio presentation parts  part along with a system time clock to control a presentation timing of the first or second type  types of digital audio signal  data; and  
 outputting one of the first or second types of audio signals  data in response to a user input designating one of the first or second types of audio signals  data, wherein the first or second type of digital audio signal  data, 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 digital audio signal  data representing accompaniment sound. 
     
     
       6. A device for processing a digital signal  data, comprising:
 an audio signal  data processor receiving  configured to receive 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  being specified by 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  data processor extracting  configured to extract the identification information, and separating  separate the data units of the first type from the data units of the second type using the identification information, said signal  audio data processor including a system time clock, a memory for storing  configured to store the data units of the first type and the second type, and first and second  an audio presentation parts receiving  part configured to receive 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  configured to control the audio signal  data processor to output an  audio signal  data 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  data processor compares  is configured to compare the system time clock to timing information in the digital audio data, and outputs  output audio data with a timing based on the comparison. 
     
     
       10. The device of  claim 6 , wherein the audio signal  data processor MPEG decodes  is configured to decode the audio data encoded in MPEG format. 
     
     
       11. The device of  claim 6 , further comprising:
 a demodulator demodulating  configured to demodulate the digital audio data prior to receipt by the audio signal  data processor.  
 
     
     
       12. A method for processing a digital signal  data, 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  being specified by 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  or second types in first or second  an audio presentation parts  part 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  method of  claim 12 , wherein the separating step includes MPEG decoding  decoding the audio data encoded in MPEG format. 
     
     
       17. The device of  claim 1 , wherein the signal  audio data processor includes a switch that  configured to selectively outputs  output the data units of the first type or the second type. 
     
     
       18. A recording medium on which digital audio data is recorded, the digital audio data comprising of 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 supplementary 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 wherein the identification information being 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 data corresponding to the data units of the first or second type, and        c) time information controlling a presentation timing of data units of the first or second type.       
     
     
       19. The recording medium of  claim 18 , wherein the data unit corresponds to a sector. 
     
     
       20. The recording medium of  claim 18 , wherein the supplementary information is included in a header of the data unit. 
     
     
       21. The recording medium of  claim 18 , wherein the first or the second type of audio data is interleaved with digital video data. 
     
     
       22. The recording medium of  claim 18 , wherein the data units correspond to packets that are multiplexed with each other. 
     
     
       23. The recording medium of  claim 18 , wherein the coding mode is a coding mode for indicating a MPEG format. 
     
     
       24. The recording medium of  claim 18 , wherein the time information includes a PTS (Presentation Time Stamp). 
     
     
       25. The recording medium of  claim 18 , wherein the digital audio data of the first type includes accompaniment sound. 
     
     
       26. The recording medium of  claim 18 , wherein the digital audio data of the second type includes accompaniment sound and vocal sound. 
     
     
       27. The recording medium of  claim 18 , wherein the first and second types of digital audio data are decoded based on the coding information.