EP0112761B1 - Dispositif de création sonore - Google Patents

Dispositif de création sonore Download PDF

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Publication number
EP0112761B1
EP0112761B1 EP83402385A EP83402385A EP0112761B1 EP 0112761 B1 EP0112761 B1 EP 0112761B1 EP 83402385 A EP83402385 A EP 83402385A EP 83402385 A EP83402385 A EP 83402385A EP 0112761 B1 EP0112761 B1 EP 0112761B1
Authority
EP
European Patent Office
Prior art keywords
signals
image
sounds
sound
parameters
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83402385A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0112761A1 (fr
Inventor
Sylvain Aubin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
France Telecom R&D SA
Original Assignee
Centre National dEtudes des Telecommunications CNET
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Centre National dEtudes des Telecommunications CNET filed Critical Centre National dEtudes des Telecommunications CNET
Publication of EP0112761A1 publication Critical patent/EP0112761A1/fr
Application granted granted Critical
Publication of EP0112761B1 publication Critical patent/EP0112761B1/fr
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H5/00—Instruments in which the tones are generated by means of electronic generators
    • G10H5/16—Instruments in which the tones are generated by means of electronic generators using cathode ray tubes
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H7/00—Instruments in which the tones are synthesised from a data store, e.g. computer organs
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H2220/00—Input/output interfacing specifically adapted for electrophonic musical tools or instruments
    • G10H2220/155—User input interfaces for electrophonic musical instruments
    • G10H2220/441—Image sensing, i.e. capturing images or optical patterns for musical purposes or musical control purposes
    • G10H2220/455—Camera input, e.g. analyzing pictures from a video camera and using the analysis results as control data
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S84/00—Music
    • Y10S84/06—Cathode-ray tube

Definitions

  • the subject of the present invention is a method and a device for creating sound implying a transformation of images into sounds, which makes it possible to analyze images including at least one moving object and to produce musical sounds from this analysis.
  • the applications are located either in the study of an individual's perceptions in front of visual images combined with audible signals, or in the detection of a person entering a room, as in the French patent published under the number FR- A-2 206 030.
  • the sound production is sensitive to only one of the parameters of the moving object, either the position of the object, or its light intensity or possibly its speed. It is understood that under these conditions, only one of the sound parameters is varied, for example the sound intensity or the pitch, and that there is therefore no question of envisaging any production of a musical composition.
  • the present invention aims, on the contrary, to allow a sound creation comparable to a musical composition, with concomitant variation of several parameters of the sounds produced.
  • it makes it possible to exploit the variation observed for several different parameters of the moving object, for example: its position and its speed, or its volume and its speed, or even its deformation on itself as in body movements of a dancer.
  • a sound creation device characterized in that it comprises first means for observing an image including a moving object and means for producing image signals as a function of the movement of this object, characterized in that it comprises second means for producing image signals translating at least two parameters of the image varying independently during the movement of the object, and third means for producing from said image signals, signals sound control, and in that it provides a synthesis of sounds by using said sound control signals to control the variations of at least two different parameters of the sounds produced.
  • the first means can advantageously include a video signal generator producing the image signals.
  • the second and third means can advantageously be designed to control parameters of the sounds chosen from the pitch of the sound, its timbre, its intensity, and optionally the rhythm of succession of the sounds or their duration or any combination of these parameters. .
  • the invention involves the use of a device for transforming a video signal into sounds, comprising at least one generator of a signal video, an analog to digital converter if the video signal is not already digital, a means of transforming the digitized video signal into a multitude p of signals representative of P parameters, a set of analog to digital converters in number equal to the number of parameters, a matrix for connecting the P signals to a second multitude of q inputs of a sound synthesizer whose output is connected to a loudspeaker.
  • FIG. 1 represents the device according to the invention, in which 1 designates a video signal generator which can be constituted, as will be seen hereinafter, by one or more achrome or polychrome video cameras, or else by a video recorder, a videodisc or any other means. Except in the case of the video disc, the video signals coming from the means 1 are generally not in digital form. From the generator output 11 they then feed an analog / digital converter 2 (input 20), which transforms the analog signals into digital signals to transmit them from its output 21 to the input 30 of the interface 3, which can be constituted , either by a microprocessor device, or by a wired logic, which will be described later. In the event that the video signal is produced from origin in digital form, it would be admitted to interface 3 directly.
  • a video signal generator which can be constituted, as will be seen hereinafter, by one or more achrome or polychrome video cameras, or else by a video recorder, a videodisc or any other means. Except in the case of the video disc, the video signals
  • the multitude p of the P outputs of the interface also supply the P digital / analog converters, the P outputs of which are connected to a connection matrix 5, making it possible to modify the P outputs of the analog converters 4, into a multitude Q of outputs that l '' we connect to the inputs of the analog sound synthesizer 6, the only output of which is connected to a speaker 7.
  • the synthesizer 6 must have a sufficient number of voltage inputs. It is desirable to be able to control at least a first input 61, acting on the synthesizer circuit defining the pitch, a second input 62 acting on the synthesizer circuit defining the timbre of the sound and therefore the number of harmonics contained in the sound, a third input 63 acting on the synthesizer circuit regulating the intensity of the sound, a fourth input 64 acting on the synthesizer circuit regulating the rhythm of succession of the notes, and a fifth input, not shown, acting on the circuit of the synthesizer regulating the duration of said notes.
  • the sound synthesizer offers the possibility of controlling special effects in voltage, vibrato, distortion, reverberation, echo, etc., it is possible to provide connections to the inputs controlling the special effects.
  • connection matrix 5 therefore makes it possible, from a number of outputs P of the converter 4, to control the Q inputs of the synthesizer 6.
  • This matrix can easily be produced by any device making it possible to combine the P signals to transform them into Q signals.
  • This connection matrix is within the reach of any person skilled in the art; it can simply be produced by plug-in studs making it possible to connect the outputs and the inputs.
  • the main role of the interface 3 is to transform the digital video signal into P signals which we will use to control the synthesizer.
  • An example of selection in the image of P parameters representative of its evolution is given in FIG. 2.
  • a frame C represents either a television screen or the viewfinder of a camera which is used to film the image.
  • For each frame an object can be defined and represented by its dimensions x, y and by its position X, Y relative to an origin 0 chosen in a corner of the frame.
  • the image can be that of a dancer who moves on a stage and whose movements are translated by the variation of the parameters X, Y, y, x.
  • a module 38 for extracting the synchronization signals delivers the video signal to be digitized and the line and frame synchronization signals.
  • the converter 2 codes the video signal on a single bit.
  • the output of the analog / digital converter 2 is connected to the input 301 of a serial-parallel converter 101, controlled by a clock 102 (itself slaved to the line synchronization signal), which delivers to the input 305 of the 39 interface of 16-bit words.
  • the line and frame synchronization signals are connected at 302 and 303 and set the state organs of interface 39 to 1. They make it possible to synchronize the progress of the program with the line and frame scans, which is important for allow the system to operate in real time.
  • the exchanges between the interface 39 and the microprocessor are either programmed or triggered by interruption.
  • a data bus 33 connects this interface to the microprocessor 31.
  • An address bus 34 thus a control bus 35, also connect the interface 39 to the microprocessor.
  • the microprocessor 31 is also connected by the address 34, data 33 and control 35 buses to a memory 32 containing the program for processing the digital information arriving at 305.
  • the input-output interface 39 transmits by the p outputs 304, the P words resulting from the processing of the digital video signal, to the P digital / analog converters 4.
  • microprocessor 31 is programmed to work in the following manner, which will be explained with the aid of the flow diagram of FIG. 4.
  • a first phase, or word processing phase when the serial-parallel converter 101 has loaded 16 bits, corresponding to a complete word, the interface 39 delivers a "full word” indication and the microprocessor loads the word in a register internal and detects the position in the word of bits at state 1, after performing the filtering operation.
  • filtering which is optional, is to get rid of parasitic luminances, by deciding that the passage from 0 to 1 only took place after having seen a certain number of 1 pass and that the passage from 1 to 0 did not take place until after the passage of a certain number of 0 (which number will determine the filtering power), which amounts to requiring a transition to have a certain stability before taking it into account.
  • the microprocessor calculates the position (x min, or x max.), Stores this information in memory, examines in the interface the organ d 'state corresponding to line synchronization (bit at 1 during top line time), and if the latter is at 0, waits for the next complete word indication to redo the same operation.
  • the microprocessor executes the second phase, or line processing phase, by comparing the information x min. and x max. relating to line n processed with the information x min, and x max. that it has in memory and which result from the processing of the previous line n-1. It only remembers the smallest of the x min. and the largest of the x max., such that when all the lines have been processed, the will remain in memory only the extreme values in x of the position of the object in the frame i (x min. frame i, x maximum frame i).
  • the microprocessor also determines whether the rank of the line processed corresponds to y min, or y max. after filtering. In this filtrate, the decision is made that a line contains only 1's if a certain number of the following lines also contain (y min.); similarly, the decision that a line does not contain more than 1 is only taken if a certain number of the lines which follow does not contain either (y max.).
  • the microprocessor then stores the values of y min. and y max. It scans the output of the interface 39 corresponding to the frame synchronization signal which enters at 303. If this is 0, it waits for the next complete word indication to process a new line, otherwise it initiates a third phase, which is a frame processing phase.
  • the microprocessor performs calculations on the information it has in memory and which are: x max. frame i, x min. frame i, y min, frame i, y max. frame i.
  • the microprocessor restores this information to the digital / analog converters 4 by addressing the outputs 304 of the interface 39 and waits for the following complete word indication to process a new frame i + 1.
  • the only limit to the complexity of the programs is the execution time.
  • the -line comprises 10 words of 16 bits and since the scanning of a line lasts 52 seconds, the processing of a word must be carried out in less than 5.2 ps, processing a line (during line feed) in less than 12 ps, frame processing (during line feed) in less than 1.2 milliseconds.
  • a second embodiment of the interface 3, in wired logic, is represented in FIG. 5.
  • the output of the device 1 providing a video signal is connected to the input 380 of a circuit 48 for extracting the synchronization signals line and frame.
  • the output 382 of circuit 48 provides a line synchronization signal, which is used to synchronize a clock 42, and which, on the other hand, is connected to an input of a logic circuit 45 with fifty inputs, including the two outputs 351 and 352 respectively deliver the signals y and Y to the digital analog converters of circuit 4.
  • the other four inputs of logic circuit 45 receive the frame synchronization signal supplied at output 383 of circuit 48 two of the output signals of logic 46 and the comparator output signal 41, making it possible to digitize the video signal received at input 310 of circuit 41.
  • This video signal, supplied by output 381 of circuit 48 is compared with a reference voltage supplied at input 311 of the comparator circuit 41. By acting on the reference voltage, the luminance level on which the switching takes place is determined.
  • logic circuit 45 The role of logic circuit 45 is to detect the first blank line at the end of the object y max. (advantageously with filtering). It builds a first signal which goes to 1 as soon as a line not blank is encountered and drops to zero at the end of the frame. It is during its high position that a counter not shown will be authorized to count the line synchronization tops, which will provide the magnitude Y.
  • Logic 45 constructs a second signal which goes to 1 as soon as a non-blank line is encountered (like the previous signal) and which drops to zero after the end of object detection. It is during the high position of this signal that a second counter, not shown, will be authorized to count the line synchronization tops, which will provide the magnitude y.
  • the output 312 of the comparator 41 drives a shift register 43, looped on itself, the shift of which is synchronized by the signal from a clock 42, which is itself synchronized with the line synchronization signal.
  • This shift register constitutes a rotating memory which makes it possible to construct and then store the location of the parameter x on a line.
  • the output of circuit 43 is connected to an input of a logic block 44 has seven inputs, of which the other six inputs receive the line synchronization signal, the clock signal and the four signals of the outputs of logic block 46, which receives on its first input 362 the line synchronization signal and on its second input 363 the frame synchronization signal.
  • the logic circuit 46 consists of a counter and a demultiplexer. Its purpose is to provide a secondary time base in order to carry out the processing which takes place after the frame return top.
  • the circuit 46 thus provides four logic signals which, with the line and frame synchronization signals, allowing the sequencing of the operations carried out by the system.
  • the outputs 340 and 341 of the logic circuit 44 deliver the signals representative respectively of x and X to the analog digital converters of the circuit 4.
  • This circuit 44 will notably include a counter and buffers.
  • the values X and Y respectively designate the abscissas and ordinates at the start of the object in projection on each axis, and not the mediums between minimum and maximum as in the previous case, also illustrated by Figure 2.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • General Engineering & Computer Science (AREA)
  • Studio Circuits (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Processing Or Creating Images (AREA)
EP83402385A 1982-12-10 1983-12-09 Dispositif de création sonore Expired EP0112761B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8220695 1982-12-10
FR8220695A FR2537755A1 (fr) 1982-12-10 1982-12-10 Dispositif de creation sonore

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP84201244.5 Division-Into 1984-08-29

Publications (2)

Publication Number Publication Date
EP0112761A1 EP0112761A1 (fr) 1984-07-04
EP0112761B1 true EP0112761B1 (fr) 1987-06-03

Family

ID=9279949

Family Applications (2)

Application Number Title Priority Date Filing Date
EP83402385A Expired EP0112761B1 (fr) 1982-12-10 1983-12-09 Dispositif de création sonore
EP84201244A Withdrawn EP0142179A1 (fr) 1982-12-10 1983-12-09 Dispositif de création sonore

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP84201244A Withdrawn EP0142179A1 (fr) 1982-12-10 1983-12-09 Dispositif de création sonore

Country Status (6)

Country Link
US (1) US4658427A (enrdf_load_stackoverflow)
EP (2) EP0112761B1 (enrdf_load_stackoverflow)
JP (1) JPS60500228A (enrdf_load_stackoverflow)
DE (1) DE3371952D1 (enrdf_load_stackoverflow)
FR (1) FR2537755A1 (enrdf_load_stackoverflow)
WO (1) WO1984002416A1 (enrdf_load_stackoverflow)

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JP3384314B2 (ja) * 1997-12-02 2003-03-10 ヤマハ株式会社 楽音応答画像生成システム、方法、装置、及び、そのための記録媒体
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Also Published As

Publication number Publication date
JPS60500228A (ja) 1985-02-21
EP0112761A1 (fr) 1984-07-04
FR2537755B1 (enrdf_load_stackoverflow) 1985-04-05
EP0142179A1 (fr) 1985-05-22
FR2537755A1 (fr) 1984-06-15
WO1984002416A1 (fr) 1984-06-21
US4658427A (en) 1987-04-14
DE3371952D1 (en) 1987-07-09

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