Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04H—BROADCAST COMMUNICATION
  • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
  • H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
  • H04H60/04—Studio equipment; Interconnection of studios
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
  • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
  • G11B27/022—Electronic editing of analogue information signals, e.g. audio or video signals
  • G11B27/028—Electronic editing of analogue information signals, e.g. audio or video signals with computer assistance
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
  • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
  • G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
  • G11B27/034—Electronic editing of digitised analogue information signals, e.g. audio or video signals on discs
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
  • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
  • G11B27/34—Indicating arrangements 

Definitions

• the invention is based on a method for the precise, automatic change of electrical signals stored on a signal carrier, in particular of magnetically recorded audio and video signals, during the transmission of the original signal to a signal receiver, according to the preamble of the main claim.
• Such methods are used, for example, in professional or semi-professional recording studio technology in connection with a multi-channel sound recording device, a multi-channel mixer for mixing the channels of the multi-channel sound recording device for recording on a stereo sound recording device and a large number of effect processors such as gates, compressors, expanders, Hall and echo devices in the signal paths between the multi-channel sound recording device and the multi-channel mixer, which are controlled by DC-controlled actuators.
• Such a recording studio device is used for the so-called stereo mixing of the sound signals stored on the multi-channel sound recording device, which were stored separately on the individual channels according to instruments, instrument groups and speech.
• Such a change in the original signals for example correction of errors or deficiencies in the original sound recording, has hitherto usually been carried out manually during mixing in addition to the volume control of the individual sound channels.
• a method for mixing a sound event recorded in the form of a plurality of telephoto events into a two-track version has also become known (DE-OS 20 01 493), in which those occurring during the mixing process are known Control signals are stored on a free track of the multi-channel recording device so that they are retained and one sound track after the other can be processed or the mixing can be repeated and the mixing program can be corrected.
• This method it is possible to regulate steady transitions and fades automatically, but not to correct individual, precisely defined defects, such as clearing the throat, sibilance or the like.
• Another disadvantage of this method is that several tracks must be reserved for the control signals on the multi-channel recording device, so that its capacity is reduced.
• This object is achieved by a generic method with the characterizing features of the main claim.
• This method has the advantage that no signal tracks on the signal carrier of the original signal have to be reserved for the correction signals for changing the original signal, but all signal tracks are available for original signal recordings.
• Another advantage of the method is that the analog graphic representation of the digitally stored original signal enables the area of the correction point to be precisely defined. This has the advantage that the desired signal change begins exactly at the required point in time and also stops exactly at the required point in time, so that, for example, an optimal correction of defects without residual defects and without impairing non-defects is ensured.
• the digital storage of the original signal provided with a time code in the memory unit of the computer results in the advantage that the processing of this signal can take place independently of the original record, so that the original record does not have to be played repeatedly in order to process make the desired changes in the right places. In addition, this accelerates the search for the location to be processed.
• the correction points can initially be roughly localized using the time code and / or by means of an acoustic preliminary check by the operator of the system, in order to then precisely define the correction area on the basis of the graphic representation.
• the procedure is carried out in three steps.
• the original signals present on a signal carrier are digitized and supplied with a time code to a data memory. If the original signals are already in digital form, the digitization step can of course be dispensed with.
• the stored digitized origin signals are graphically, preferably in analog form, shown and checked for points to be corrected and corresponding correction signals stored in synchronism with the original signal.
• Individual parameters of the original signal such as its volume, frequency range and the like can also be displayed digitally for checking and changing. For example, the volume level of the original signal can be displayed digitally in order to influence it dynamically by means of a corresponding actuator.
• the third method step consists in the transmission of the signals to a receiving device, for example in the mixing and stereo recording of sound signals, in that the stored correction signals are played back in synchronism with the original recording, and the original signals are thus automatically and dynamically changed and transferred to the receiving device, for example stereo sound recording device.
• the original signals are therefore not changed by the corrective measures either on the original record or in the digital data memory, but rather only in the playback circuit, for example in the mixer and given if in the recording of the stereo sound recorder. This makes it possible to undo, extend, improve corrections or to create and compare different variants.
• the correction signals are synchronized with the aid of a time code which is already present or introduced on the original record. This time code is transferred from the signal carrier to the data memory used to store the correction signals.
• the method according to the invention is also suitable for the use of any type of voltage-controlled effect processors, e.g. Hall and echo devices to control in all parameters.
• the volume of sound signals can also be controlled using this method.
• these devices can be used dynamically, ie not, as in known methods, by changing between static settings. Such program changes are far more complex and less precise, even if they should be controlled automatically.
• the use of the method according to the invention for processing image signals is used in particular for processing magnetic recordings of such signals before they are played back on television.
• the method according to the invention In current reports, there is often little time between recording and broadcasting to correct any image errors. It is therefore usually not possible to cut the magnetic record.
• rapid processing can take place without destroying the original.
• the method according to the invention is used in control and regulation technology, in particular in the creation of control programs and control loops. The advantage here is that an existing basic program can be changed and tried out without destroying the original program.
• the envelope of the complex original signal of each channel of the signal carrier is determined and represented graphically in the computer and the check for points to be processed and the necessary correction is carried out on the basis of these envelopes.
• the graphic representation takes place by means of a screen.
• the invention which relates to multichannel signal carriers and analog origin signals, several or all channels of the signal carrier are digitized via a common analog-digital converter.
• the analog-digital converter has one for this Channel selection function, which can preferably be controlled via the computer.
• different channels of the multi-channel signal carrier can also be preselected. This measure advantageously saves the analog-digital converter otherwise required for each individual channel.
• the DC-controlled actuator is connected to a plurality of effect processors, with the interposition of voltage-holding elements, which influence the original signal during playback.
• the actuator has a distributor function that can be controlled via the computer.
• This configuration has the advantage that instead of a large number of DC-controlled actuators for controlling effect processors, each of which must be controlled by the computer, one actuator, but at least fewer actuators, is sufficient to control the effect processors required for the desired corrections. All required effect processors such as voltage-controlled amplifiers, filters and the like are thus addressed by a common DC-controlled actuator, an intermediate holding element maintaining the control voltage for each effect processor until it is addressed again by the actuator.
• the drawing shows an example of a device for carrying out the method according to the invention. This method is described in more detail below with reference to the drawing.
• FIG. 1 is a block diagram of this device
• FIG. 2 is a graphical representation of the envelope of a sound signal
• FIG. 3 is a graphical representation of a sequence of corrective measures.
• a multi-channel sound recording device 1 is provided with a number of sound outputs 2 corresponding to the number of channels, each of which is connected via a sound line 3 to the effect processors 4, 5, 6 and 7 connected in series and then to an input of the mixer 8.
• the mixer 8 has a stereo output 9, via which it is connected to a stereo recording device 10.
• the output signal of each channel of the multi-channel recording device 1 is tapped off and fed via the signal path 11 with the interposition, for example, of a serial interface 12 and a serial-parallel converter 13 to an analog-digital converter 14.
• the analog-digital converter 14 passes the now digital signal on to a computer 15 in which the signal is stored.
• the sound signals of all channels of the multi-channel recording device 1 can be stored separately in the computer 15, Selector circuit in the analog-to-digital converter 14, the sound signals of all channels can be digitized by a common analog-to-digital converter.
• the selection function of the analog-digital converter can be designed to be controllable from the computer 15.
• the digital audio signals stored in the computer 15 can be reproduced in channels, preferably in the form of an envelope, on a graphic output device, in particular a screen 16, in analog form.
• the computer 15 is used to store the synchronized correction signals. These are fed from the computer 15 via a digital-analog converter 17 with the interposition of, for example, a parallel-serial converter 18 and a serial interface 19 to an actuator 20 which, with the interposition of one voltage holding element 21 each, with the effect processors 4, 5 , 6 and 7 is connected.
• a digital-analog converter 17 with the interposition of, for example, a parallel-serial converter 18 and a serial interface 19 to an actuator 20 which, with the interposition of one voltage holding element 21 each, with the effect processors 4, 5 , 6 and 7 is connected.
• the audio signals or their envelopes are reproduced channel by channel on the screen 16 and the defects are sought.
• the synchronous playback of the sound recording device 1 can be helpful in that the area sought is roughly localized by acoustic control.
• This area is then examined on screen 16 for the acoustically detected defects and a time-correcting correction is entered into the memory of the computer.
• both the time and the duration of the correction measure can be precisely defined, so that an optimal correction is ensured when stereo mixing.
• the same procedure can be used when using Hall and echo devices etc.
• an envelope curve is shown by way of example in FIG. 2, which has a defect in the form of a high peak, which can be caused, for example, by clearing the throat.
• the beginning of this defect at T1 and its end at T2 can be determined exactly in this representation, so that the corresponding corrective measure can be entered into the computer just as precisely, ie in a timely manner, and used when mixing.
• the calculation 15 gives the control signals via digital-analog converter 17, interface 18 and parallel-serial converter 19 to the actuator 20, which in turn controls one of the effect processors 4, 5, 6 and 7.
• actuator 20 has a multiplex function that can be controlled by computer 15. All effect processors 4, 5, 6 and 7 of a channel can thus be controlled by a single actuator 20, a holding member 21 ensures that the control voltage is applied to the effect processors 4, 5, 6 and 7 until the respective effect processor is addressed again by the actuator 20 and receives a new control voltage.

Landscapes

• Engineering & Computer Science (AREA)
• Multimedia (AREA)
• General Engineering & Computer Science (AREA)
• Signal Processing (AREA)
• Stereophonic System (AREA)
• Arrangements For Transmission Of Measured Signals (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=6403446

Family Applications (1)

Country Status (4)

Cited By (3)

Families Citing this family (2)

Family Cites Families (6)

• 1990
  • 1990-03-30 DE DE19904010324 patent/DE4010324A1/de active Granted
• 1991
  • 1991-03-27 CS CS91829A patent/CS82991A3/cs unknown
  • 1991-03-28 AU AU75428/91A patent/AU7542891A/en not_active Abandoned
  • 1991-03-28 WO PCT/DE1991/000274 patent/WO1991015851A2/de active Application Filing

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