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Class 360/28 - Reference carrier to control demodulator


Subclass of Class 360 - Dynamic magnetic information storage or retrieval
Definition: Subject matter wherein the control signal is a recorded
No. of patents: 21
Last issue date: 09/20/2005


NumberTitleIssue Date
6948070Systems and methods for secure transaction management and electronic rights protection
The present invention provides systems and methods for secure transaction management and electronic rights protection. Electronic appliances such as computers equipped in accordance with the present invention help to ensure that information is accessed and used only...
09/20/2005
6748079Method and system for recording data on and reading data from an optical medium
Accordingly, an improved method for recording data on an optical medium is disclosed which includes receiving and encoding a first set of data frames by a CIRC encoder to generate a second set of data frames. A control byte is then added to each of the second set of...
06/08/2004
5424849Video signal reproduction apparatus and time base correcting device
The video signal reproduction apparatus having two kinds of equalizing circuits to correct the level of a frequency-modulated luminance signal, that is, a first equalizing circuit which raises the level of the upper sideband range of the frequency-modulat...
06/13/1995
5231542Method and device for improving bass response in magnetic tape recording
The present invention relates to a method and device for recording the low frequency band of an audio signal on an amplitude modulated carrier above the highest frequency component of the audio signal. The carrier frequency is at least 19 kHz and is recor...
07/27/1993
5142419Audio signal reproducing apparatus
An apparatus for reproducing from a recording medium a frequency-modulated audio signal which has its carrier level in a specific period determined according to the kind of information and for producing the audio signal after processing the reproduced aud...
08/25/1992
4914526Information recording system and apparatus
An information recording system and apparatus records on a recording medium an audio signal, which is time-base compressed at a predetermined compression ratio, together with a data signal indicative of the compression ratio. A start signal indicative of ...
04/03/1990
4807056Method and apparatus for video signal recording and playback signal level compensation based on recorded reference signal
A video signal recording and playback apparatus and method which is applicable to wide-band recording in which a video signal is divided into a plurality of channels by time-axis expansion, and the channels are recorded in parallel on respective tracks. P...
02/21/1989
4646278Pick-up positioning apparatus for data playback apparatus
A pick-up positioning apparatus for a recording disc playback apparatus such as a video disc player, comprising a control circuit, a memory circuit, a scanning mechanism for moving the pick-up of the playback apparatus along a radius of a recording disc m...
02/24/1987
4535368Wow and flutter control apparatus for audio and video playback systems
Apparatus for correcting the distortion in the output of a playback device introduced by wow and flutter by sampling a constant frequency as reproduced and comparing it with the signal as originally recorded to produce a correction signal for modulating a...
08/13/1985
4420774FM Data recording and playback method and apparatus
A method and apparatus for recording a data signal and for playing it back at a variable speed ratio including a recording unit, a playback unit and a speed control unit. A modulated carrier wave is first recorded and subsequently played back at a differe...
12/13/1983
4389681Method and apparatus for recording digitized information on a record medium
At least one channel of digitized information is recorded in a selected number of data tracks by a record medium. The digitized information is encoded, modulated and then recorded in a predetermined number of tracks. For example, if n channels of digitize...
06/21/1983
4385327Audio system having a time base error correction arrangement
A system for reproducing and/or transmitting analog audio information is disclosed which provides for the correction of time base errors. An inaudible pilot signal accompanies the audio information. Correction circuitry examines the frequency and phase ch...
05/24/1983
4384308Apparatus for recording and detecting a cue signal
An apparatus for recording and detecting a cue signal which comprises: a recording section (100) for recording in a recording medium a composite cue signal formed of a component signal having a first frequency (f1) and denoting a tape speed pattern and another...
05/17/1983
4378573Magnetic recording and reproducing system with noise cancellation
A magnetic recording and reproducing system is disclosed in which a frequency-modulated input signal is recorded on a magnetic medium together with a further signal which is discriminative from the frequency-modulated signal. The recorded frequency-modula...
03/29/1983
4359691Demodulator for frequency modulated signal accompanied by reference signal
The demodulator is especially adapted for a data signal (F'c) that was recorded on tape in the form of a frequency modulated signal together with a reference signal (F'R) of frequency greater than the greatest frequency of the data signal, so that both si...
11/16/1982
4353099Tape-recorded signal recovery method and apparatus
A method and apparatus for recovering analog signal information from a multiple-track information storage medium such as a magnetic tape is based upon time base error correction of a frequency modulated carrier signal. In one embodiment, the phase differe...
10/05/1982
4179713Method and equipment for the production of multi-channel sound signal
A method and apparatus for the recording and reproduction of an audio signal for multi-channel play-back in which both a monaural signal and a code signal are recorded on a magnetic tape, the recorded code signal having characteristics in accordance with ...
12/18/1979
4136364Multi-state wow and flutter reduction system and method
An improved method and apparatus for reducing wow and flutter associated with recording devices are disclosed. Two input signals containing useful information and a constant reference signal are recorded and reproduced by a three channel recording and rep...
01/23/1979
4041526Control of automatic color control and color killer circuits in video signal reproducing apparatus
In apparatus for reproducing a signal recorded on a magnetic tape or other record medium and which includes a signal band containing an information signal, such as the chrominance component of a color video signal, and a reference signal of a predetermine...
08/09/1977
4005477Phase equalized readback apparatus and methods
A magnetic recorder employs a feedback phase equalizer for adjusting the readback signal to enhance detection capability. Phase errors are measured and used as criteria for dynamically and adaptively adjusting phase compensation of the read-back signal. I...
01/25/1977
3938184Digital flutter reduction system
A digital flutter reduction system which corrects for a varying time base ror in FM recordings on magnetic tape. Pulse transitions from the outputs of a reference oscillator and a reference tone on a first tape track are compared by a flip-flop whose outp...
02/10/1976
 
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