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WO1996016509A1 - Dispositif d'animation video par production de signaux video soumis a une influence audio - Google Patents

Dispositif d'animation video par production de signaux video soumis a une influence audio Download PDF

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Publication number
WO1996016509A1
WO1996016509A1 PCT/EP1995/004583 EP9504583W WO9616509A1 WO 1996016509 A1 WO1996016509 A1 WO 1996016509A1 EP 9504583 W EP9504583 W EP 9504583W WO 9616509 A1 WO9616509 A1 WO 9616509A1
Authority
WO
WIPO (PCT)
Prior art keywords
video
control
audio
audio signal
signal
Prior art date
Application number
PCT/EP1995/004583
Other languages
German (de)
English (en)
Inventor
David Althammer
Benjamin Kleinke
Original Assignee
David Althammer
Benjamin Kleinke
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
Priority claimed from DE19503411A external-priority patent/DE19503411C1/de
Application filed by David Althammer, Benjamin Kleinke filed Critical David Althammer
Priority to AU41750/96A priority Critical patent/AU4175096A/en
Publication of WO1996016509A1 publication Critical patent/WO1996016509A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects

Definitions

  • the invention relates to a device for video animation by means of generating audio-influenced video signals, and to a method for operating such a device.
  • DE 38 16 545 A1 discloses a device for generating sound and randomly controlled images, with the aid of which abstract, colored representations on a screen can be realized. These representations can either be changed depending on the output signal of a microphone or randomly.
  • a provided video signal generator can generate several different images and overlay the individual images. These pictures consist of areas and lines of different colors.
  • a frequency band filter is connected downstream of the microphone, the output of the frequency band filter leading to a multiplexer and A / D converter.
  • a selector switch can be used to switch between tone-controlled and random-controlled positions.
  • a personal computer calculates shapes and colors depending on the digitized audio signal. On the output side, the personal computer is connected to the video signal generator for image generation. The video signal generated in this way is via a
  • Video amplifier fed to a monitor Although sound-dependent video signals can be artificially generated as pure computer images in a digitized manner, it is not possible to feed existing video clips or live video information and to control or influence them in an audio-dependent manner.
  • video trick mixers are known, with the help of which the operator of such a trick mixer is able to make manual adjustments according to his personal feeling or depending on the music rhythm in order to alienate a video signal present.
  • Known video mixers allow editing of adjacent video sources. With simple devices, however, the image can only be used to a small extent, e.g. B. can be influenced by changing the color saturation, the image contrast or the brightness. More complex, mostly digital devices are able to carry out more complex image processing. So z. B. the setting of a mosaic effect in the sense of a rasterization of the image, freezing, three-dimensional scrolling of the image and the like possible.
  • the functions mentioned above have only been able to be called up manually manually using key controls and other operating elements and their intensity and speed of execution have been defined.
  • known video mixers have alphanumeric displays or the like and in some cases have the option of pre-programming the desired parameters in order for this data to run automatically.
  • the object of the invention is achieved with the features of patent claims 1 and 6, the subclaims comprising at least expedient refinements and developments of the invention.
  • An essential basic idea of the invention is to influence an externally provided or generated video signal as a function of a frequency-selected audio signal by means of a predeterminable number of video effects and to output it to a video output for further processing or display.
  • the audio signals are automatically influenced in this case, certain video effects being assigned to selected frequency ranges and / or amplitudes of the audio signal by means of software.
  • a computer-controlled video trick mixer is used, the video signal to be influenced being fed to the video trick mixer via at least one video input.
  • the video trick mixer is connected to an audio signal processing device, which audio signal processing device transmits digitized current amplitude values of selected, for example three, frequency bands to the control computer of the video trick mixer.
  • a specific keyboard unit can be used to assign a specific video effect or a video effect combination to each of the frequency bands.
  • the audio signal processing device contains at least three frequency band filters with downstream rectifiers, the respective outputs of the rectifiers each leading to an input of a switchable multiplexer.
  • the output of the multiplexer is connected to an analog / digital converter which, via a corresponding output bus, supplies the control PC of the video trick mixer with digitized amplitude values of the respective frequency band filter selected by means of the multiplexer.
  • the control PC of the video trick mixer delivers a switchover or trigger signal to the multiplexer of the audio signal processing device.
  • the keyboard unit is arranged between the outputs of the analog / digital converter and the corresponding inputs of the control PC and serves for the adjustable, logical assignment of video effects to each frequency band.
  • the device By means of the device according to the invention it is possible to establish a direct, direct relationship between the audio and video image without having to operate a controller manually, for example in time with the music. Accordingly, music in particular can be optically accompanied by a corresponding video, the video being alienated in a varied and appealing manner by the large number of possible adjustable video effects.
  • the individual video effects can be automatically activated or deactivated according to the intensity and / or type of the sound signal, which simplifies the operation of the device and ensures a corresponding relationship between the sound or audio signal with different types of sound.
  • the device according to the invention can be used, for example, as a video effects device in discotheques and for video productions.
  • an audio signal processing device 1 which in the example shown has three frequency band filters, namely a high pass 2, a band pass 3 and a low pass 4.
  • the inputs of the frequency band filters 2 to 4 form the audio input 5 of the audio signal processing device 1.
  • each frequency band filter 2 to 4 is connected to a rectifier 6 to 8.
  • the respective outputs of the respective rectifiers 6 to 8 are each connected to an input of a multiplexer 9.
  • An analog / digital converter 10 is connected on the output side of the multiplexer 9.
  • the A / D converter 10 has a conversion width of 8 bits.
  • the output bus 11 with z. B. 8 lines is placed on a modified control input 12 of a video trick mixer 13.
  • the video trick mixer 13 has at least one video input 14 and one video output 15.
  • the video trick mixer 13 has an internal control PC 16.
  • a modified printer input of the control PC 16 can be used, for example, as the modified control input 12, with respect to the data transmission direction.
  • a control and trigger signal is sent from the control PC 16 of the video trick mixer 13 to the multiplexer 9 of the audio signal processing device 1.
  • a part, for example 4 of the data lines of the output bus 11 of the A / D converter 10 can be routed to a special keyboard unit (not shown) in order to have an externally specifiable assignment of video to be able to make effects for the respective frequency band filters 2 to 4.
  • the conversion or conversion rate of the A / D converter 10 can be influenced by means of the control PC 16 of the video trick mixer 13.
  • a digital audio signal for the respective frequency band, its respective instantaneous amplitude on the output bus, is thus provided with the aid of the frequency band filters 2 to 4 and the downstream rectifiers 6 to 8 as well as the multiplexer 9 and the analog / digital converter 10 11 is present as a data word and can be stored in the control PC 16 or in a separate register.
  • the conversion for the next following frequency band is carried out after completion of a conversion cycle of a frequency band filter and storage of the received signal.
  • the required switchover is carried out with the multiplexer 9.
  • the above-mentioned digital filtering has the particular advantage that the cut-off frequencies of the respective filter sections can be changed or adjusted at any time without effort and under software control. This enables the device to be individually adapted to the respective type of audio signals present.
  • the analog frequency-selective audio signal preprocessing changeable bandpass characteristics or switchable bandpasses are provided in order to enable the above-mentioned adaptation of the device to different sound or sound spectra.
  • the table below shows an example of the assignment of the video effects to the individual frequency band filters 2 to 4.
  • the video signal is so distorted with every bass pulse that the image virtually flies towards the viewer.
  • the louder or stronger the impulse the more the image is enlarged.
  • the image is rasterized, whereby the size of the raster points increases with the volume.
  • the "color play” effect can also be used when there is no external video signal.
  • the screen or the projection screen shows a color that changes depending on the amplitude of the sound signal.
  • the combination 3, "keying 2" results in a slowly flowing movement which can be accelerated to a tunnel-like effect by zooming the respective video channel accordingly.
  • the combination 4, "flip" position is characterized by that on the head ends of the video image as a function of a specific audio signal threshold.
  • the modified control input 11 is initialized and the respective video input is selected, the video system or video standard is defined and the audio signal processing device 1 is activated.
  • the status of the A / D converter 10 is now continuously queried by means of the software of the control PC 16 of the video trick mixer 13 until it is recognized that the conversion is complete.
  • This register also contains the position of the keyboard unit for the assignable assignment of the video effects.
  • the effects are now prepared by means of the video trick mixer 13.
  • the audio signal strength either determines how intensely an effect, e.g. Zoom, is executed, or whether a corresponding effect, for. B. a negative display is to be switched on.
  • This sequence is repeated continuously, so that audio-influenced control of the video signals is possible continuously and up to date.
  • the video trick mixer 13 used in the exemplary embodiment has, for example, two mutually independent video channels which support both composite (FBAS) and S-video signals in PAL, NTSC and SECAM. After digitization, the mixer synchronizes video sources on the video output or on an external synchronizing pulse. Existing video devices can be connected in this way without additional time base correction. Internally, the video trick mixer digitizes the input signal with double oversampling in PAL quality. The video output signal is generated as FBAS or Y / C signal by a digital encoder in PAL or NTSC.
  • a midi interface or a midi card instead of an audio signal processing device, with the aid of which midi sound data or
  • Sequences can be used directly to control the video effects. For example, it is possible on CD's Use existing midi tracks in order to achieve an optimal video animation bypassing complex analog signal preprocessing directly and immediately depending on the tone and rhythm.
  • the video trick mixer has effect modules that are independent and programmable.
  • video effects can be carried out in real time with the two video sources which are present on the video channels.
  • Using a digital, linear keyer, smooth transitions, desolves and keying effects between the video and graphic levels are achieved.
  • a video trick mixer software can be used to predefine digital video effects so that a large number of video effects can be selected and combined via a corresponding user level, without having to intervene in the internal program, or other complicated setting work is necessary are.
  • the device according to the invention and the associated method for operating such a device allow sounds, in particular music, to be automatically and alternately underpinned optically by external video signals, with a predetermined relationship between the
  • Audio or sound signal and the external video signal is guaranteed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Circuits (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

Un signal audio (5) est appliqué à l'entrée d'une unité de traitement de signal audio (1) et un signal de commande numérisé (11) dépendant de la fréquence, qui peut être sélectionné par l'intermédiaire d'un commutateur (9) commandé, est produit. Le signal de commande est introduit dans une entrée de commande modifiée (12) d'un mélangeur-truqueur vidéo numérique (13) qui est pourvu d'un PC de commande (16) et d'au moins une entrée vidéo (14) et d'une sortie vidéo (15). Au départ du PC de commande, différentes bandes de fréquence du signal audio appliqué sont captées et une altération du signal vidéo externe appliqué est exécutée conformément aux valeurs audio numérisées.
PCT/EP1995/004583 1994-11-21 1995-11-21 Dispositif d'animation video par production de signaux video soumis a une influence audio WO1996016509A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU41750/96A AU4175096A (en) 1994-11-21 1995-11-21 Video animation device based on the production of audio-influenced video signals

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4441381 1994-11-21
DEP4441381.5 1994-11-21
DE19503411A DE19503411C1 (de) 1994-11-21 1995-02-02 Vorrichtung zur Videoanimation mittels Erzeugung audiobeeinflußter Videosignale
DE19503411.2 1995-02-02

Publications (1)

Publication Number Publication Date
WO1996016509A1 true WO1996016509A1 (fr) 1996-05-30

Family

ID=25942159

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/004583 WO1996016509A1 (fr) 1994-11-21 1995-11-21 Dispositif d'animation video par production de signaux video soumis a une influence audio

Country Status (2)

Country Link
AU (1) AU4175096A (fr)
WO (1) WO1996016509A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3513993A1 (de) * 1985-04-18 1986-10-23 Stefan 8021 Icking Reich Video-effektgeraet
US5048390A (en) * 1987-09-03 1991-09-17 Yamaha Corporation Tone visualizing apparatus
EP0518500A2 (fr) * 1991-06-14 1992-12-16 SONY ELECTRONICS INC. (a Delaware corporation) Mélangeurs de vidéo
WO1993002524A1 (fr) * 1991-07-19 1993-02-04 Princeton Electronic Billboard Images televisees a indices inseres selectionnes
WO1994022128A1 (fr) * 1993-03-23 1994-09-29 Alex Blok Systeme de graphismes pour intermodulation son-lumiere

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3513993A1 (de) * 1985-04-18 1986-10-23 Stefan 8021 Icking Reich Video-effektgeraet
US5048390A (en) * 1987-09-03 1991-09-17 Yamaha Corporation Tone visualizing apparatus
EP0518500A2 (fr) * 1991-06-14 1992-12-16 SONY ELECTRONICS INC. (a Delaware corporation) Mélangeurs de vidéo
WO1993002524A1 (fr) * 1991-07-19 1993-02-04 Princeton Electronic Billboard Images televisees a indices inseres selectionnes
WO1994022128A1 (fr) * 1993-03-23 1994-09-29 Alex Blok Systeme de graphismes pour intermodulation son-lumiere

Also Published As

Publication number Publication date
AU4175096A (en) 1996-06-17

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