Separate-type musical performance system for synchronously producing sound and visual images and audio-visual station incorporated therein
First Claim
1. A music performance system for synchronously producing music sound and visual images, comprising:
- plural communication channels independently of one another, and selectively assigned pieces of music data representative of music sound, pieces of first timing data representative of respective occurrences of said pieces of said music data, pieces of periodical data each representative of a sign of a time period, pieces of second timing data representative of respective occurrences of said pieces of periodical data and pieces of visual data representative of at least an attribute of visual images for propagating therethrough without any guarantee of a time consumed in the propagation;
a first audio-visual station includinga music data source outputting said pieces of music data together with the associated pieces of first timing data and said pieces of second timing data to one of said plural communication channels,a visual data source outputting said pieces of visual data and said pieces of periodical data to said another of said plural communication channels,a time keeper producing said pieces of periodical data at regular intervals, connected to said music data source and said visual data source and determining a first time at which each of said pieces of music data occurs and a second time at which each of said pieces of periodical data occurs, thereby selectively supplying said pieces of first timing data, said pieces of second timing data and said pieces of periodical data to said music data source and said visual data source; and
a second audio-visual station connected to said plural communication channels so as to receive said pieces of music data, said pieces of first timing data, said pieces of periodical data, said pieces of second timing data and said pieces of visual data, and includingan internal clock measuring a third time asynchronously with said time keeper,a clock setter pairing said pieces of second timing data with the associated pieces of periodical data to see whether or not a time difference between arrivals thereat is ignoreable, and setting said internal clock right on the basis of said pieces of second timing data and said time difference if said time difference is not ignoreable,a visual image generator supplied with said pieces of visual data so as to produce said visual images anda music sound generator comparing said pieces of first timing data with said third time so as to produce said music sound synchronously with said visual images.
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Abstract
A separate-type music performance system has a master audio-visual station and a slave audio-visual station remote from the mater audio-visual station and connected through two communication channel independently of each other; MIDI music data codes and click time data codes are transmitted through one of the communication channels to the slave audio-visual station, and audio-visual data codes and a click signal are transmitted through the other communication channel; when the click signal and click time data code arrive the slave audio-visual station, the clock setter 21e sets an internal clock with the click time data code paired with the click signal, and the MIDI music data code are transferred to an automatic player piano in comparison with the time data and the internal clock, whereby the tones are produced synchronously with the visual images.
108 Citations
25 Claims
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1. A music performance system for synchronously producing music sound and visual images, comprising:
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plural communication channels independently of one another, and selectively assigned pieces of music data representative of music sound, pieces of first timing data representative of respective occurrences of said pieces of said music data, pieces of periodical data each representative of a sign of a time period, pieces of second timing data representative of respective occurrences of said pieces of periodical data and pieces of visual data representative of at least an attribute of visual images for propagating therethrough without any guarantee of a time consumed in the propagation; a first audio-visual station including a music data source outputting said pieces of music data together with the associated pieces of first timing data and said pieces of second timing data to one of said plural communication channels, a visual data source outputting said pieces of visual data and said pieces of periodical data to said another of said plural communication channels, a time keeper producing said pieces of periodical data at regular intervals, connected to said music data source and said visual data source and determining a first time at which each of said pieces of music data occurs and a second time at which each of said pieces of periodical data occurs, thereby selectively supplying said pieces of first timing data, said pieces of second timing data and said pieces of periodical data to said music data source and said visual data source; and a second audio-visual station connected to said plural communication channels so as to receive said pieces of music data, said pieces of first timing data, said pieces of periodical data, said pieces of second timing data and said pieces of visual data, and including an internal clock measuring a third time asynchronously with said time keeper, a clock setter pairing said pieces of second timing data with the associated pieces of periodical data to see whether or not a time difference between arrivals thereat is ignoreable, and setting said internal clock right on the basis of said pieces of second timing data and said time difference if said time difference is not ignoreable, a visual image generator supplied with said pieces of visual data so as to produce said visual images and a music sound generator comparing said pieces of first timing data with said third time so as to produce said music sound synchronously with said visual images. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An audio-visual station remote from a music sound generator and a visual image generator, comprising:
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a music data source outputting pieces of music data representative of music sound together with associated pieces of first timing data representative of respective occurrences of said pieces of music data and pieces of second timing data representative of respective occurrences of pieces of periodical data to a communication channel; a visual data source outputting pieces of visual data representative of at least an attribute of visual images and said pieces of periodical data to another communication channel independent of said communication channel; and a time keeper producing said pieces of periodical data at regular intervals, and determining a first time at which each of said pieces of music data occurs and a second time at which each of said pieces of periodical data occurs, thereby selectively supplying said pieces of first timing data, said pieces of second timing data and said pieces of periodical data to said music data source and said visual data source. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An audio-visual station remote from a music data source and a visual data source and receiving pieces of music data representative of music sound, pieces of first timing data representative of respective occurrences of said pieces of music data, pieces of periodical data each representative of a sign of a time period, and pieces of second timing data representative of respective occurrences of said pieces of periodical data and pieces of visual data representative of an attribute of visual images for synchronously producing said music sound and said visual images,
said audio-visual station comprising an internal clock module measuring a time, a clock setter module paring said pieces of second timing data with said pieces of periodical data to see whether or not a time difference between the arrivals thereat is ignoreable, and setting said internal clock right on the basis of said pieces of second timing data and said time difference if said time difference is not ignoreable, a visual image generator supplied with said pieces of visual data so as to produce said visual images, and a music sound generator comparing said time with another time expressed by said pieces of second timing data so as timely to produce said music sound synchronously with said visual images.
Specification