Source: http://www.google.com/patents/US20090277323?ie=ISO-8859-1
Timestamp: 2014-12-19 18:18:16
Document Index: 2550417

Matched Legal Cases: ['art 1', 'art 2', 'art 2', 'art 3', 'art 3', 'art 3']

Patent US20090277323 - Apparatus for Controlling a Digital Audio Signal - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsAn 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....http://www.google.com/patents/US20090277323?utm_source=gb-gplus-sharePatent US20090277323 - Apparatus for Controlling a Digital Audio SignalAdvanced Patent SearchPublication numberUS20090277323 A1Publication typeApplicationApplication numberUS 12/507,242Publication dateNov 12, 2009Filing dateJul 22, 2009Priority dateFeb 29, 2000Also published asDE60132781D1, DE60132781T2, EP1312090A1, EP1312090B1, US7012184, US7238874, US8097800, US8198524, US8217252, US8502058, US8680385, US8802954, US20020181378, US20060130639, US20070283798, US20100077909, US20120111177, US20120253494, US20120272812, US20130315044, US20140204722, WO2001065559A1Publication number12507242, 507242, US 2009/0277323 A1, US 2009/277323 A1, US 20090277323 A1, US 20090277323A1, US 2009277323 A1, US 2009277323A1, US-A1-20090277323, US-A1-2009277323, US2009/0277323A1, US2009/277323A1, US20090277323 A1, US20090277323A1, US2009277323 A1, US2009277323A1InventorsMark-Jan BastianOriginal AssigneeN2It Holding B.V.Export CitationBiBTeX, EndNote, RefManClassifications (25), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetApparatus for Controlling a Digital Audio SignalUS 20090277323 A1Abstract 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. 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. 2. The apparatus according to claim 1, including a digital audio source controlled by the demodulated time-code signal.
3. The apparatus according to claim 2, wherein the digital audio source comprises a CD player, a DVD player, or an MP3 device.
4. The apparatus according to claim 1, wherein the speed of the play of a digital audio source is controlled by the apparatus.
5. The apparatus according to claim 1, wherein the direction of the play of a digital audio source is controlled by the apparatus.
6. The apparatus according to claim 1, wherein the modulated time-code signal comprises a right channel and a left channel.
7. The apparatus according to claim 6, 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.
CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation application of U.S. patent application Ser. No. 11/773,195, entitled �Method For Signal Processing, And Apparatus Therefore�, filed on Jul. 3, 2007, which 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 now U.S. Pat. No. 7,238,874, issued Jul. 3, 2007, 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 now U.S. Pat. No. 7,012,184, issued Mar. 14, 2006, 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.
INTRODUCTION 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 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.
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.
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.
FIG. 2 show as block diagrams the signal processing applied in the apparatus according to one embodiment of the present invention.
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 FIG. 1 shows a disc 1.1 which is manufactured according to known manufacturing techniques that have been in use for many years now in the manufacture of conventional records. The disc 1.1 is provided with an absolute time-code signal by making use of a time-code generator 1.2 controlling a modulator 1.3 which supplies a carrier frequency modulated by the time-code generator 1.2 and which is applied to the disc 1.1 as the only signal. Block 1.4 shows the conventional manufacturing method of recording, making of the master disc, and pressing the final vinyl disc 1.1. The disc 1.1 can be placed on a turntable 1.5 of a record player 1.6, which is further provided with an arm 1.7 and a pick-up element 1.8.
The pick-up element 1.8 can follow the groove in the disc 1.1 that comprises the absolute time-code signal, and the pick-up element 1.8 is connected to the apparatus part 1.9 for demodulating the carrier signal in order to provide the (digital) time-code signal, which serves for the control of the digital audio source 1.10, for instance a CD player, a DVD player, an MP3 reproduction device, or the like.
Referring now first to FIG. 2, it is shown that the signal that is derived from the pick-up element 1.8 according to FIG. 1, is fed to a input buffer 2.1 from which a signal may be finally led to a mixing table 2.2 in order to provide for the situation that the turntable 1.5 according to FIG. 1 carries a conventional analogue vinyl record. The just-mentioned input buffer 2.1 feeds a preamplifier 2.3, provided with a low rejector circuit, and which feeds in turn an analogue/digital converter 2.4, for instance a 16-bit or 20-bit converter, depending on the desired resolution. The reference numerals 2.5, 2.6 and 2.7 refer to a digital filter, the operation of which depends on, inter alia, the speed of movement of the disc 1.1 according to FIG. 1 vis-a-vis the pick-up element 1.8. The apparatus part 2.7 of FIG. 2 may comprise a phase-locked loop circuit for detecting and following the carrier frequency which is provided on the disc 1.1 according to FIG. 1. In the current implementation, however, use is made of a moving average filter supplemented with detection means for detecting a stand-still of the disc 1.1. Furthermore, demodulation takes place in the circuit of apparatus part 2.6 for demodulating the time-code signal that is modulated on the carrier frequency. Although the above subject matter is shown and explained as the signal in a single channel, it is preferable according to the invention that a left and a right channel is present, and that the detection apparatus which forms part of the digital filter 2.5, 2.6, 2.7 is made in duplicate so as to allow a phase difference between the left and the right channel carrying the demodulated time-code signal to be determined. In this manner, the correct place and direction of movement of the disc 1.1 in relation to the pick-up element 1.8 according to FIG. 1 can be determined with high resolution.
The phase difference between the left and right channel is useful to extract the directional information very quickly when the pick-up element 1.8 is suddenly lowered onto the rotating disc 1.1. The absolute time-code which is determined from the carrier frequency is subsequently used together with the relative time-code, which is based on the difference between the left and the right channel, to determine an accurate time-code signal 2.10 which serves to control the digital audio source 1.10 as shown in FIG. 1. The time-code signal 2.10 of FIG. 2 is therefore read into apparatus part 3.1 (see FIG. 3) of the digital audio source, wherein same provides a direct control of a digital audio reader 3.2 reading the desired digital information from the correct place of for instance a CD disc. This digital audio information is being transferred from apparatus part 3.2 to a digital output filter 3.5 which is being controlled by control logic 3.4, and which determines from the time-code signal which is read into apparatus part 3.1, the speed of change of the time-code signal. This speed of change signal which is derived from the time-code signal, determines the parameters of the digital output filter 3.5. In a manner known to the expert, the digital output filter 3.5 can then feed a digital electric output socket, a digital optical signal output, or a D/A converter. This last provision is shown in the Figure with reference numeral 3.6.
Classifications U.S. Classification84/612International ClassificationG10H1/00, G11B3/00, G11B27/00, G11B19/02, G11B20/10, G11B27/30, G10H7/00Cooperative ClassificationG11B2220/2562, G10H3/03, G11B2220/2545, G11B27/3036, G10H2210/241, G10H2250/631, G10H1/0091, G11B20/10527, G11B19/02, G11B19/28, G11B27/005European ClassificationG11B20/10C, G11B27/30C1, G11B19/02, G10H3/03, G10H1/00S, G11B27/00VLegal EventsDateCodeEventDescriptionMay 14, 2014ASAssignmentOwner name: N2IT HOLDING B.V., NETHERLANDSFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BASTIAN, MARK-JAN;REEL/FRAME:032889/0680Effective date: 20060302Jun 22, 2011ASAssignmentOwner name: N2IT HOLDING B.V., NETHERLANDSEffective date: 20110524Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HEMEL, TIM;REEL/FRAME:026484/0127RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google