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序号	专利名	申请号	申请日	公开（公告）号	公开（公告）日	发明人
121	ENCODING/DECODING COLOUR VIDEO SIGNAL AND DIGITAL DATA	AU2444584	1984-02-10	AU2444584A	1984-08-23	IMMINK KORNELIS ANTONIE SCHOUH; AARTS RONALDUS MARIS; KAHLMAN JOSEPHUS ARNOLDUS HENR; HOOGENDIJK ADRIANUS HUIBERT
A method of encoding a recording signal, record carrier provided with a recording signal encoded in accordance with the method, apparatus for carrying out the method, and apparatus for reproducing a signal encoded in accordance with the method. A method is described on encoding a recording signal comprising a composite colour video signal and a further signal, in particular an audio signal for recording said signal on and reading it from an optical video disc. The colour video signal is frequency-modulated on a carrier in the customary manner, whilst the further signal is added to said frequency-modulated signal as a pulse-width-modulated digital signal.
122		DK60384	1984-02-10	DK60384A	1984-08-15	IMMINK KORNELIS ANTONIE SCHOUH; AARTS RONALDUS MARIA; KAHLMAN JOSEPHUS ARNOLDUS HENR; HOOGENDIJK ADRIANUS HUIBERT
A method of encoding a recording signal, record carrier provided with a recording signal encoded in accordance with the method, apparatus for carrying out the method, and apparatus for reproducing a signal encoded in accordance with the method. A method is described on encoding a recording signal comprising a composite colour video signal and a further signal, in particular an audio signal for recording said signal on and reading it from an optical video disc. The colour video signal is frequency-modulated on a carrier in the customary manner, whilst the further signal is added to said frequency-modulated signal as a pulse-width-modulated digital signal.
123		FR7720837	1977-07-06	FR2357973B1	1984-04-13

124	DEVICE FOR REPRODUCING MAGNETIC PULSE-DURATION MODULATED RECORD	SU3562491	1983-03-04	SU1078458A1	1984-03-07	ZAMORA TEODOR E; LUKYANETS GEORGIJ V

125	Magnetic recording systems	GB8205118	1982-02-22	GB2117548A	1983-10-12	CLARK GORDAN ALBERT
A magnetic recording system, such as an audio frequency magnetic tape recorder, comprises a pulse width modulator 8-15 which receives the input signal and a magnetic recording transducer 51 which receives the pulse width modulated signal. Thus, the full dynamic range of the recording medium can be utilized to minimise noise and the distortion induced by the transfer characteristic is substantially eliminated, particularly at high signal levels. The modulator is a Schmitt oscillator with amplitude limited by zener diode 15. The oscillator frequency reduces to accommodate lengthening pulse widths of negative polarity without pulse widths being inconveniently short for positive polarity signals.
126	RECORDING AND PLAYBACK METHOD AND APPARATUS	CA282094	1977-07-05	CA1104247A	1981-06-30	NUMAKURA TOSHIHIKO
Overlapping, minute regions of magnetization in a recording medium, which are produced during recording and cause distortion of the played back signal, are reduced by encoding the signal in a pulse signal. She time between pulses is varied according to the amplitude of the signal to be recorded, and when this pulse signal is recorded, the minute regions are reduced to elemental size. Thus they overlap less and do not distort the reproduced signal by offsetting the zero level.
127	PULSE F.M. MAGNETIC VIDEO RECORDING	AU2663577	1977-06-30	AU514632B2	1981-02-19	MUMAKURA T

128	WIDTH-MODULATED SIGNAL REPRODUCING DEVICE	SU2493992	1977-06-02	SU678509A1	1979-08-05	GANAPETYAN MELS A

129		DE2336634	1973-07-18	DE2336634C3	1979-01-18	YUMDE, YASUFUMI; FURUHATA, TAKASHI
A system for converting an analog picture signal of a wide band into a pulse train signal of a narrow band composed of means for sampling and storing a picture signal of at least one frame, means for reading the stored signal at each sample value at an arbitrary rate, and means for producing a train of pulses with pulse intervals proportional to the read out sample values can reduce the average transmission time because the entire time of the pulse train signal representing one frame of picture varies depending on the contents of the picture. A system for converting a pulse train signal of a narrow band into an analog picture signal of a wide band composed of means for producing a signal of sample amplitudes proportional to the pulse intervals of a supplied pulse train signal, and storing means in which the signal of sample amplitudes is written at each pulse of the pulse train signal and from which the picture signal is read out at the rate equal to the period of sampling the picture signal after the end of the writing of a signal of one picture in the storing mean.
130		FR7720837	1977-07-06	FR2357973A1	1978-02-03

131		SU1992328	1974-01-28	SU526946A1	1976-08-30

132		SU1671726	1971-06-21	SU472370A1	1975-05-30

133		FR1070484D	1952-09-30	FR1070484A	1954-07-27	RAYMOND FRANCOIS-HENRI

134	Method for recording data on optical recording medium	JP2006195833	2006-07-18	JP2006286194A	2006-10-19	AHN YONG-JIN; PARK IN-SIK; LEE KYUNG-GEUN; YANG CHANG-JIN; TATSUHIRO OTSUKA; YOON DU-SEOP; KIM SEONG-SUE; KO JUNG-WAN
<P>PROBLEM TO BE SOLVED: To provide a method for recording data with a recording waveform which has an erase pattern capable of improving mark configuration further. <P>SOLUTION: In the method for recording data on the optical recording medium 200, by using a recording waveform having the erase pattern including specified pulses whose (b) high level is higher than an erase power (Pe) level and whose low level is lower than the erase power level, a stage for forming mark and space is included, the power level of a head level of the erase pattern is at a high level of a unit pulse sequence constituting the erase pattern, and the power level between the last pulse and the next recording pulse is at the high level of the unit pulse sequence. <P>COPYRIGHT: (C)2007,JPO&INPIT
135	FLEXIBLE MOUNT AND UNMOUNT FOR FREELY USER-ATTACHABLE/ DETACHABLE MEDIUM	JP17854397	1997-07-03	JPH10105342A	1998-04-24	DUNCAN WILLIAM L
PROBLEM TO BE SOLVED: To provide an easy and flexible user interface for mounting and unmounting the freely user-attachable/detachable medium. SOLUTION: A user interface 30 which receives an input 32 from a user of a computer system is provided to acquire a medium identifier input 50 for discriminating the freely user-attachable/detachable medium and a function identifier input 52 specifying a mount process which should be performed on the freely user-attachable/detachable medium. The interface processes the medium identifier input 50 and function identifier input 52 and accesses the freely attachable/detachable interface 12 of the computer system. The interface 30 generates dummy medium events 36 and 38 to mount the freely user-attachable/ detachable medium on the computer system.
136		JP3992184	1984-03-01	JPH0550041B2	1993-07-28	NAGANO YASUYUKI

137	REGENERATING CIRCUIT FOR PULSE WIDTH MODULATING SIGNAL	JP26045888	1988-10-18	JPH02108278A	1990-04-20	HIRAMATSU AKIHIKO
PURPOSE:To obtain the stable regenerative output independently of tape traveling speed by providing an integration circuit and a differentiation circuit to be supplied with an input signal made by differentiating a pulse width modulating signal and a comparator for comparing outputs of these circuits. CONSTITUTION:When the tape traveling speed is a constant speed or a high speed as faster than the former, an output of the integration circuit 12 becomes a reference level of the comparator 14. By comparing this reference level with an output of the differentiation circuit 13, a pulse signal having a pulse width corresponding to a duty ratio of the pulse width modulating signal regenerated by a regenerative head is generated. By this method, even when the output of the circuit 12 is lowered at the time of the high speed, a prescribed output is obtained from the circuit 13 so that the stable regenerating is carried out. Then, when the tape traveling speed is a low speed as slower than the constant speed, although the output of the circuit 13 is lowered, the prescribed output is obtained from the circuit 12. At this time, the output of the circuit 13 becomes the reference level of the comparator 14, and this is compared with the output of the circuit 12, so that the pulse signal is stably regenerated.
138	REGENERATIVE RELAY CIRCUIT	JP17973985	1985-08-14	JPS6239909A	1987-02-20	HIRAOKA SUSUMU; TAKENAKA SHINYA; MATSUOKA HARUJI
PURPOSE:To regenerate a reception pulse FM signal whose duty cycle is not 50% due to distortion so as to attain that the duty cycle is 50% by constituting the titled circuit with digital elements only such as a counter, a FIFO memory and a flip-flop. CONSTITUTION:An input signal having a reception waveform whose duty cycle is not 50% and having a period T is counted by a counter 102 for one period and 1/n=(n=1, 2...) of the output is written in the FIFO memory 103. The output of the FIFO memory is inputted to a counter 104, counted down by a clock having a period of n/2 times of the clock of the counter 102 and the state of a flip-flop 104 is changed at every generation of a borrow signal and then an output signal with 50% duty cycle is regenerated from the flip-flop.
139	PCM SIGNAL RECORDING AND REPRODUCING DEVICE	JP15812485	1985-07-19	JPS6220180A	1987-01-28	OKAMOTO HIROO; KIMURA HIROYUKI; YAMAZAKI SHIGERU; NOGUCHI TAKAHARU; KOBAYASHI MASAHARU
PURPOSE:To accomplish high-speed copying without increasing the speed accessing to a storage circuit by using two storage circuits, and executing the error correction of PCM signals stored in one of the said circuits during the PCM signals are being written in or read out from the other circuit. CONSTITUTION:In case of copying the PCM signal recorded in a magnetic tape 1 to a magnetic tape 2, the signal reproduced from the tape 1 is stored in a RAM 10 or 11, thereafter errors are corrected then the results are read again from the RAM 10 or 11 to be recorded in the tape 2. In such a case, the RAMs 10 and 11 are switched and are alternately used for the writing and reading or error-correcting to slow down the speed accessing to the RAMs and the circuits. Also, only one recording and reproducing circuit and one error- correcting circuit are used, therefore, the scale of the circuitry does not become large.
140	Pcm signal recording method	JP21612284	1984-10-17	JPS6196574A	1986-05-15	OKAMOTO HIROO; KOBAYASHI MASAHARU
PURPOSE: To record data of n-bit comprising one word by using n pcs. of data composed of high-order n-bit of a PCM signal having k-word and using k×(m-n)/n pcs. of data obtained by dividing k×(m-n) pcs. of data composed of low-order bits by n-bit unit. CONSTITUTION: High-order eight bits and low-order four bits of the PCM signal of an L channel which are inputted from an input terminal 20, are latched in a latch circuit 37 and a latch circuit 38 through a switching circuit 40, respectively. The high-order eight bits of the L channel latched in the circuit 37 are outputted from an output terminal 36 as a symbol 10. Then high-order eight bits and low-order four bits of an R channel which are inputted from the terminal 20, and latched in the circuit 37 and a latch circuit 39 through the circuit 40, respectively. Next, eight bit data latched in the circuits 38 and 39 are outputted from the terminal 36 as a symbol 11. Finally, the high-order eight bits of the R channel latched in the circuit 37 are outputted from the terminal 36 as a symbol 12. Thus, a signal can be converted into data of eight bits to record it. COPYRIGHT: (C)1986,JPO&Japio

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