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.
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0. 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.
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.
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.
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.
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
3. A device as claimed in
an MPEG audio decoder for decoding configured to decode the audio signal data.
5. The method of
8. The device of
9. The device of
10. The device of
11. The device of
a demodulator demodulating configured to demodulate the digital audio data prior to receipt by the audio signal data processor.
14. The method of
15. The method of
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
17. The device of
0. 19. The recording medium of
0. 20. The recording medium of
0. 21. The recording medium of
0. 22. The recording medium of
0. 23. The recording medium of
0. 24. The recording medium of
0. 25. The recording medium of
0. 26. The recording medium of
0. 27. The recording medium of
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According to one embodiment, the present invention is directed to a method for reproducing a digital data recorded on a medium, the digital data including a video data and an audio data, the audio 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 the 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 data being interleaved between data units of digital video data, the method comprising: demodulating the digital audio data to restore an original signal; receiving the demodulated audio data; extracting the second information; 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 based on the extracted second information, by storing the first and second types of digital audio data in a memory, receiving the data units corresponding to the separated first or second types of digital audio data in an audio presentation part along with a system time clock to control a presentation timing of the first or second types of digital audio data; and outputting one of the first or second types of audio data in response to a user input designating one of the first or second types of audio data, wherein the first or second type of digital audio data, designated by the user input, is identified using the second information.
According to one embodiment, the present invention is directed to a device for processing a digital data, comprising: an audio data processor 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 unitincluding 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 the 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 data processor configured to extract the identification information, and separate the data units of the first type from the data units of the second type using the identification information, the audio data processor including a system time clock, a memory configured to store the data units of the first type and the second type, and an audio presentation 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 configured to control the audio data processor to output audio data corresponding to the data units of one of the first or second types, based on the identification information.
According to one embodiment, the present invention is directed to a method for processing a digital 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 unitincluding 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 the 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 or second types in an audio presentation 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.
According to one embodiment, the present invention is directed to a recording medium on which digital audio data is recorded, the digital audio data comprising of 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 including 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 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.
This invention is to be explained in detail hereinafter, referring to the attached drawings.
A subheader in accordance with this invention is shown in FIG. 4. To distinguish audio data Aa, containing both vocal sound and accompaniment sound, and audio data Ab, containing only accompaniment data, there is provided subheader information in an audio packet, the subheader includes coding information encoded therein with a distinguishing value applied thereto.
The coding information is, included into a subheader of each sector at data encoding as a distinguishing value, standardized as $0 F in case of MPEG video, and $7 F in case of MPEG audio, wherein new coding information (for example 3F) is added to use for a distinguishing signal for the audio data sector Aa, having both vocal sound and accompaniment sound, and the audio data sector Ab having only accompaniment sound.
Interleaving of MPEG video and MPEG audio sectors is as shown in FIG. 5. The interleaving of video data and audio data sectors, in general has 4 to 5 consecutive video sectors V with one audio sector A added thereto, where coding information is used to distinguish a sector containing the encoded Aa and Ab.
Since the increase of buffer size due to the newly added audio sectors Aa and Ab is infinitesimal compared to the image data, it can be ignored.
That is, the karaoke CD format in accordance with this invention includes a CD format divided into video sectors and audio sectors, and the audio sectors are further divided into a part Aa for recording both accompaniment sound and vocal sound at the same time and a part Ab for recording accompaniment sound only, and the audio sectors are further provided to record coding information for distinguishing between audio data stored in the two parts.
As shown in
The control part 30 controls the entire system according to the signal applied through a key matrix 80.
The demodulation part 40 includes a first demodulator 41 for carrying out EFM demodulation from the CD format provided to distinguish a part Aa for recording accompaniment sound and vocal sound at the same time, and a part Ab for recording accompaniment sound only, where the part is under the control of the control part 30, and a second demodulator 42 for demodulating signals recorded in interleaved sectors for a CD-ROM from the signal received from the first demodulator 41 and applying the second demodulated signal to the audio processing part 70 under the control of the control part 30, thereby demodulating the signal read in from the CD format provided to distinguish a part Aa, for recording accompaniment sound and vocal sound at the same time, and a part Ab, for recording accompaniment sound only, under the control of the control part 30.
The audio signal processing part 70 includes a CPU 71 for separating audio data and time data from the signal received from the second demodulator 42 under the control of the control part 30, a STC (System Time Clock) part 77 for generating a synchronizing signal using time information received from the CPU 71, a memory 72 for storing the audio data received from the CPU 71, an MPEG audio decoder 73 for decoding the MPEG audio data stored in the memory 72, a demultiplexer 74 for separating data received form the MPEG audio decoder 73 into data corresponding to accompaniment sound and vocal sound and data corresponding to accompaniment sound and outputting the separated data under the control of the CPU 71, a first audio presentation part 75 for comparing the PTS (Presentation Time Stamp) in the data corresponding to the accompaniment sound received from the demultiplexer 74 to the signal received from the STC 77 to control presentation time of the data, and a second audio presentation part 76 for comparing the PTS (Presentation Time Stamp) in the data corresponding to accompaniment sound and vocal sound received from the demultiplexer 74 to the signal received from the STC 77 to control presentation time of the data, thereby processing the audio signal using signals received from the demodulation part 40 to separate the data into data corresponding to a first data containing accompaniment sound only, and outputting the separate data.
The switch 50 selects one of the data corresponding to the accompaniment sound and vocal sound, or to only the accompaniment sound received from the first and the second audio presentation parts 75 and 76 of the audio signal processing part 70 and transmits the selected data under the control of the control part 30.
The D/A converter 60 converts the data received from the switch 50 under the control of the control part 30.
The system and operation for processing a video signal is the same as for a conventional karaoke CD system.
Operation of the device for controlling a karaoke CD audio signal in accordance with this invention as described above is to be explained hereinafter.
The encoded karaoke-CD data having coding information applied thereto is added with a distinguishing value and has EFM signals demodulated through the first demodulation part 41 which is a EFM/CIRC (Cross Interleave Read Solomon Code) and errors of the CD are corrected. The interleaved data at encoding is demodulated through the second demodulation part 42 which is a CD-ROM decoder, and is separated into audio, video, and time data in the CPU 71.
In the instant, of audio data, the demultiplexing signal coming in at the reading in of the coding information is applied to the demultiplexer 74 for operation of the demultiplexer 74.
Of the data demultiplexed in the CPU 71, the MPEG audio data is stored in the memory 72 temporarily, has the compression restored through the MPEG audio decoder 73, and is transmitted. The demodulated audio data received from the MPEG audio decoder 73 is separated into audio data carrying accompaniment sound only and audio data carrying accompaniment sound and vocal sound through the demultiplexer 74, and applied to the first audio data presentation part 75 and the second audio presentation part 76 respectively under the control of the CPU 71.
The audio demultiplexing signal received from the CPU 71 controls the first audio presentation part 75 to compare the received audio data Ab, carrying accompaniment sound only out of the audio signal applied thereto, to a PTS to control the presentation time and controls the second audio presentation part 76 to compare the received audio data Aa, carrying voice, i.e., vocal sound and accompaniment sound out of the audio signal applied thereto to a PTS to control the presentation time. The audio data received from the first and the second audio presentation parts 75 and 76 is applied to the D/A converter 60 through a switching operation of the switch 50 under the control of the control part 30, where it is converted in the D/A converter 60 and output to a speaker.
In this instant, the switch 50 is operated under the control of the control part 30 which is operated according to the key signal applied through the key matrix 80.
Operation of a karaoke CD audio system is to be explained hereinafter, referring to FIG. 7.
First, a subheader and packet header are read 100, and demultiplexing is carried out to separate into an audio demultiplexing signal and a MPEG audio signal 101. The separated MPEG audio signal is decoded to separate into audio signals containing accompaniment sound only, and audio signals containing both vocal sound and accompaniment sound using the audio demultiplexing signal 102, and the PTS of each packet is read to synchronize and transmit signals 103.
The MPEG audio format, as shown in
As has been explained, this invention for a karaoke CD system increases the enjoyment of karaoke by reproducing audio data containing a player's voice, i.e., vocal sound and accompaniment sound, and audio data containing accompaniment sound selectively, which permits stereophony sound corresponding to the CD sound.
Although the invention has been described in conjunction with specific embodiments, it is evident that many alternatives and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, the invention is intended to embrace all of the alternatives and variations that fall within the spirit and scope of the appended claims.
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