Patent EP0427447A2 successfully refreshed from Google Patents.
EP0427447A2
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EP
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Karaoke music reproduction device
Assignee: Individual
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Filing: 1990-10-31
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Granted: —
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Expires: 2010-10-31
Abstract
Abstract The device generates an audio signal from a sound source using a MIDI signal. The music data consists of many pieces of music stored in a memory device like a database in an on-line host computer or an external magneto-optical disc. The music generation processing operations are carried out by 2 microprocessors, each assigned a different set of functions to speed up the overall processing. The receipt and transfer of data to the sound source from the sequencer is carried out in parallel. The data is subsequently output in parallel and the contents of the buffer are monitored constantly to prevent overflow malfunctions. Clock time is divided to enable the generation of trigger signals to control tempo. By variation of the timing of tee trigger signals in accordance with tempo data taken from the data stream, the tempo can be varied while reducing the reproduction time processing load.
Inventors
- 👤 designation of the inventor has not yet been filed The
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 19:40
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/0033; G10H1/0041; G10H1/0058; G10H1/0066; G10H1/18; G10H1/26; G10H1/36; G10H1/361; G10H1/365; G10H2220/00; G10H2220/005; G10H2220/011; G10H2240/00; G10H2240/121; G10H2240/125; G10H2240/171; G10H2240/201; G10H2240/241
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
118 words
A karaoke music reproduction device which comprises a memory device in which is stored a number of pieces of music each in the form of binary coded music data, a dedicated microprocessor to read out specified music data from said memory device selected by means of an input device and a dedicated microprocessor to convert read-out music data to signals conforming to a specified standard and to output said signal data to a sound source via a sequencer, and which is characterized by the division of the memory, used on transfer of said music data from the first aforementioned microprocessor to the second aforementioned microprocessor, into two areas which are each used for aliernate read and write operations.
Claim 2
Dependent Claim
118 words
A karaoke music reproduction device which comprises a memory device in which is stored a number of pieces of music each in the form of binary coded music data, a dedicated microprocessor to read out specified music data from said memory device selected by means of an input device and a dedicated microprocessor to convert read-out music data to signals conforming to a specified standard and to output said signal data to a sound source via a sequencer, and which is characterized by the division of the memory, used on transfer of said music data from the first aforementioned microprocessor to the second aforementioned microprocessor, into two areas which are each used for aliernate read and write operations.
Claim 3
Dependent Claim
16 words
The karaoke music reproduction device according to claim 1 with a magneto-optical disc as memory device.
Claim 4
Dependent Claim
18 words
The karaoke music reproduction device according to claim 1 which uses the MIDI standard as its specified standard.
Claim 5
Dependent Claim
127 words
A karaoke music reproduction device comprising a mechanism which downloads specified music data, selected by means of an input device, via a public communications line from a host computer holding a database consisting of a number of pieces of music each stored in the form of binary coded music data, and, on completion of said download, divides said specified music data into data units which it loads alternately into each area of a memory consisting of two memory areas, a microprocessor which outputs a signal of fixed length on completion of the loading of each of said data units and a microprocessor which responds to receipt of said fixed length signal by saving each data unit alternately from said loaded memory area to a separate memory device.
Claim 6
Dependent Claim
127 words
A karaoke music reproduction device comprising a mechanism which downloads specified music data, selected by means of an input device, via a public communications line from a host computer holding a database consisting of a number of pieces of music each stored in the form of binary coded music data, and, on completion of said download, divides said specified music data into data units which it loads alternately into each area of a memory consisting of two memory areas, a microprocessor which outputs a signal of fixed length on completion of the loading of each of said data units and a microprocessor which responds to receipt of said fixed length signal by saving each data unit alternately from said loaded memory area to a separate memory device.
Claim 7
Dependent Claim
16 words
The karaoke music reproduction device according to claim 4 with a magneto-optical disc as memory device
Claim 8
Dependent Claim
113 words
A karaoke music reproduction device comprising a sequencer for the sequential processing of "composition data" which it outputs to a sound source, and a sound source which uses said data to generate an audio signal which it outputs to peripheral units such as an amplifier, said sound source incorporating a buffer, which is capable of accepting said data in several stages, which processes any data held in said buffer, and which also carries out interrupt processing whereby it loads data in response to a strobe pulse from said sequencer if there is sufficient space in said buffer, and outputs a pause signal to said sequencer if there is insufficient space in said buffer.
Claim 9
Dependent Claim
113 words
A karaoke music reproduction device comprising a sequencer for the sequential processing of "composition data" which it outputs to a sound source, and a sound source which uses said data to generate an audio signal which it outputs to peripheral units such as an amplifier, said sound source incorporating a buffer, which is capable of accepting said data in several stages, which processes any data held in said buffer, and which also carries out interrupt processing whereby it loads data in response to a strobe pulse from said sequencer if there is sufficient space in said buffer, and outputs a pause signal to said sequencer if there is insufficient space in said buffer.
Claim 10
Dependent Claim
41 words
The karaoke music reproduction device according to claim 6 in which the sound source determines the readiness of peripheral units for reproduction, and outputs a pause signal to the sequencer in cases where a peripherai unit is not ready for reproduction.
Claim 11
Dependent Claim
183 words
A karaoke music reproduction device configured for the reproduction of music by means of the time-processing by a microprocessor of binary coded music data, including the reproduction length of each musical sound and the space length between each musical sound and the specification of the tempo of the music, and by converting said time-processed data from parallel to serial format in a sequencer and then outputting it from a sound source, and comprising an "n"-bit timer which divides the clock cycle in order to generate trigger signals of specified length which it inputs to said microprocessor, a counter which counts a fixed number of cycles in accordance with said trigger signals, a comparator which compares the count value of said counter with the set numeric value of the aforementioned reproduction or space lengths and causes an advance to the next music data fetch operation when the set numeric value corresponds to said count value, and a division value converter which converts said division value and thereby the interval of the trigger signal from the "n"-bit timer whenever the fetched data is tempo data.
Claim 12
Dependent Claim
183 words
A karaoke music reproduction device configured for the reproduction of music by means of the time-processing by a microprocessor of binary coded music data, including the reproduction length of each musical sound and the space length between each musical sound and the specification of the tempo of the music, and by converting said time-processed data from parallel to serial format in a sequencer and then outputting it from a sound source, and comprising an "n"-bit timer which divides the clock cycle in order to generate trigger signals of specified length which it inputs to said microprocessor, a counter which counts a fixed number of cycles in accordance with said trigger signals, a comparator which compares the count value of said counter with the set numeric value of the aforementioned reproduction or space lengths and causes an advance to the next music data fetch operation when the set numeric value corresponds to said count value, and a division value converter which converts said division value and thereby the interval of the trigger signal from the "n"-bit timer whenever the fetched data is tempo data.
Claim 13
Dependent Claim
20 words
The karaoke music reproduction device according to claim 8 in which a 16-bit timer is used as the "n"-bit timer.
Claim 14
Dependent Claim
19 words
A karaoke music reproduction device substantially as described herein, with reference to, and as illustrated in the accompanying drawings.
Claim 15
Dependent Claim
19 words
A karaoke music reproduction device substantially as described herein, with reference to, and as illustrated in the accompanying drawings.
References Cited (Backward Citations)
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