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Method for signal processing and an apparatus thereforeRelated Patent Categories: Music, Instruments, Electrical Musical Tone Generation, Data Storage, Digital Memory Circuit (e.g., Ram, Rom, Etc.), Note Sequence, Accompaniment, ,Method for signal processing and an apparatus therefore description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070283798, Method for signal processing and an apparatus therefore. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a continuation application of U.S. patent application Ser. No. 11/355,851, entitled "Disc For Use In An Apparatus For Signal Processing, And Such An Apparatus", filed on Feb. 15, 2006 which is a divisional application of patent application Ser. No. 10/133,846, entitled "Disc For Use In An Apparatus For Signal Processing, And Such An Apparatus", filed on Apr. 26, 2002, which is a Continuation of International Application Number PCT/NL01/00055 filed on Jan. 26, 2001 entitled "Disc For Use In An Apparatus For Signal Processing, And Such An Apparatus", which is a continuation and claims priority to The Netherlands application number NL 1014526, entitled "Disc For Use In An Apparatus For Signal Processing, And Such An Apparatus", filed Feb. 29, 2000. The specification and claims thereof are incorporated herein by reference. STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] Not Applicable INTRODUCTION [0003] The invention primarily relates to a disc for use in an apparatus for signal processing. Further, the invention relates to such an apparatus for signal processing. BACKGROUND OF THE INVENTION [0004] From WO 97/01168, a system is known for the digital processing of audio signals which is particularly suitable for disc jockeys and scratch artists. The speed and direction of a digital audio signal, for instance derived from a CD player, can be controlled according to this citation by the manual control of a rotational element. This rotational element is placed for instance on a turntable of a conventional record player and is being read by means of an optical sensor determining the speed and direction of rotation of the turntable. The data that are obtained thereby are being used to control the speed and direction of reproduction of the CD player. The problem associated with this known apparatus is, however, that it is hardly usable by disc jockeys and in scratch applications for the reason that from a given position of the reading head of the CD player only continuously developing relative movements are possible that depend on the control of the earlier mentioned rotational element. In the known apparatus, it is for instance not possible to make swift reproductions of different musical segments on the CD in a way that is reproducible and can be controlled satisfactorily. Also the authentic scratch sound which can be realized by means of a conventional record, cannot be obtained with the known apparatus. SUMMARY OF THE INVENTION [0005] With the invention it is intended to improve this and to provide a system which allows to provide a sound impression with a digital sound source which conforms to the possibilities that exist with conventional records, and with which quickly digitally recorded (musical) fragments can be located. [0006] In a first aspect of the invention, a disc is proposed therefore which is designed for use in such an apparatus for signal processing, such that the disc during its use is placed on the turntable and is provided with a groove which can be followed by the pick-up element, and which comprises a time-code signal wherein during use of the disc the said time-code signal controls the digital audio source. [0007] A practical embodiment of the disc is characterized in that the time-code signal is an absolute time-code signal that is comprised in the groove in a predetermined number subsequently arranged discrete steps. It is advisable to select the number of discrete steps in such way that the resolution is sufficiently high to realize the intended effect. In practice this means that the number of discrete steps may count five per second. [0008] From a view point of cost efficiency and also to make a natural connection to the known scratching techniques with conventional records, it is desirable that the time-code signal is modulated on a carrier frequency in the audible range between 20 and 20,000 Hz. In this way, it is possible to simply use normal audio equipment for playing the disc. [0009] In a further aspect of the invention, the apparatus for signal processing is so equipped that the pick-up element feeds a digital filter which has a phase-locked loop circuit for detecting and following a carrier frequency, and a demodulation circuit for demodulating the time-code signal that is modulated on the carrier frequency. The disc and the apparatus for signal processing can then cooperate such that the absolute time-code signal that is present on the disc, provides the control for the digital audio source. [0010] It is further advantageous that the groove of the disc comprises a time-code signal in both the left and the right channel, which are mutually shifted in phase. In this way, a quick determination of the direction in respect of the rotation of the disc can be extracted. [0011] Appropriately then the apparatus is equipped with a detection device for determining a phase difference between the time-code signal demodulated from the left and the right signal, respectively. In this way, the desired direction of play of the digital audio equipment can be determined already when the needle is lowered onto the disc according to the invention without noticeable delay, enhancing the impression that one is working with an entirely conventional analogue audio installation. [0012] A suitable embodiment of the apparatus is characterized in that it comprises a digital audio buffer being under control of the time-code signal, and that the digital audio buffer is connected to a digital output filter which feeds a signal output which is selected from the group formed by a digital electric output socket, a digital optic signal output, and a D/A converter. [0013] The scratch effect can be manufactured in such an apparatus particularly adequately when it comprises control logic being fed by the time-code signal for determining a velocity signal being a measure for the speed of change of the time-code signal, and that the digital output filter is being controlled by the said control logic. BRIEF DESCRIPTION OF THE DRAWINGS [0014] The invention will now be further elucidated in respect of a non-limiting embodiment explaining the disc and its use in an apparatus according to the invention in a schematic diagram. [0015] FIG. 1 shows schematically the apparatus for signal processing according to according to one embodiment of the present invention and the disc to be used thereby. [0016] FIG. 2 show as block diagrams the signal processing applied in the apparatus according to one embodiment of the present invention. [0017] FIG. 3 then show as block diagrams the signal processing applied in the apparatus according to according to one embodiment of the present invention the invention. DETAILED DESCRIPTION OF THE INVENTION Continue reading about Method for signal processing and an apparatus therefore... Full patent description for Method for signal processing and an apparatus therefore Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Method for signal processing and an apparatus therefore patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Method for signal processing and an apparatus therefore or other areas of interest. ### Previous Patent Application: Combination polygon-shelled and round-shelled drum Next Patent Application: Pneumatic system with one or more piston-cylinder arrangements Industry Class: Music ### FreshPatents.com Support Thank you for viewing the Method for signal processing and an apparatus therefore patent info. IP-related news and info Results in 0.49485 seconds Other interesting Feshpatents.com categories: Novartis , Pfizer , Philips , Polaroid , Procter & Gamble , 174 |
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