Method for signal processing and an apparatus therefore

Abstract

An apparatus for signal processing, wherein a disc is placed on a turntable and is provided with a groove which can be followed by the pick-up element, and employing a time-code signal wherein during use of the disc the said time-code signal controls the digital audio source.

1 . A method for controlling a digital audio source, comprising: 
 playing a disc on a turntable, wherein the disc comprises control signal;    following a groove in the disc with a pick-up element, wherein the control signal is derived from the disc by the pick-up element;    modulating the control signal on a carrier frequency in the audible range between 20 and 20,000 Hz;    demodulating the control signal; and    reading the demodulated control signal into a receiver to provide control of a digital audio source.    
   
   
       2 . The method according to  claim 1 , wherein the control signal comprises a time-code signal.  
   
   
       3 . The method according to  claim 2 , wherein the disc comprises only time-code signals.  
   
   
       4 . The method according to  claim 1 , including applying an absolute time-code control signal on the disc.  
   
   
       5 . The method according to  claim 1 , wherein control of the digital audio source includes controlling the speed of the play of the digital audio source.  
   
   
       6 . The method according to  claim 1 , wherein control of the digital audio source includes controlling the direction of the play of the digital audio source.  
   
   
       7 . The method according to  claim 6 , including detecting a phase difference between the control signal demodulated from a right channel and a left channel for determining the direction of play for the digital audio source.  
   
   
       8 . The method according to  claim 1 , including producing a scratch effect by the digital audio source.  
   
   
       9 . The method according to  claim 1 , wherein the digital audio source plays music while under the control of the demodulated control signal.  
   
   
       10 . The method according to  claim 1 , wherein the control signal is modulated on a single channel.  
   
   
       11 . The method according to  claim 1 , wherein digitally recorded fragments can be located for play on the digital audio source with the demodulated control signal.  
   
   
       12 . The method according to  claim 1 , wherein the digital audio source comprises a CD player, a DVD player, and an MP3 device.  
   
   
       13 . The method according to  claim 1 , further comprising: 
 deriving a signal from the disc by the pick-up element, wherein the disc is a conventional analogue vinyl record;    feeding the derived signal into a mixing table;    feeding the modulated control signal into a digital filter; and    using the output of the digital filter to control the digital audio source.    
   
   
       14 . A method of using a time-code signal to control a digital audio source, comprising: 
 playing a disc on a turntable, wherein the disc includes time-code signals;    deriving a time-code signal from the disc while the disc is being played on the turntable;    modulating the derived time-code signal on a carrier frequency in the audible range between 20 and 20,000 Hz;    feeding the modulated time-code signal into a digital filter;    demodulating the time-code signal; and    reading the demodulated time-code signal into a receiver to provide control of a digital audio source.    
   
   
       15 . An apparatus for controlling a digital audio source, comprising: 
 a turntable;    a disc comprising a time-code signal, wherein the disc is placed on the turntable;    a pick-up element deriving a time-code signal from the disc on the turntable;    a carrier frequency in the audible range of 20 to 20,000 Hz for modulating the time-code signal from the pick-up element;    a filter for demodulating the time-code signal; and    a time-code receiver for receiving the demodulated time-code signal to be used to control a digital audio source.    
   
   
       16 . The apparatus according to  claim 15 , including a digital audio source controlled by the demodulated time-code signal.  
   
   
       17 . The apparatus according to  claim 16 , wherein the digital audio source comprises a CD player, a DVD player, and an MP3 device.  
   
   
       18 . The apparatus according to  claim 15 , wherein the speed of the play of a digital audio source is controlled by the apparatus.  
   
   
       19 . The apparatus according to  claim 15 , wherein the direction of the play of a digital audio source is controlled by the apparatus.  
   
   
       20 . The apparatus according to  claim 15 , wherein the modulated time-code signal comprises a right channel and a left channel.  
   
   
       21 . The apparatus according to  claim 20 , wherein the direction of the play of a digital audio source is controlled by detecting a phase difference between the right channel and the left channel.