专利检索_..脉冲调制记录或重现的（脉冲编码调制记录的入G11B20/10）专利检索_..脉冲调制记录或重现的（脉冲编码调制记录的入G11B20/10）专利检索查询_..脉冲调制记录或重现的（脉冲编码调制记录的入G11B20/10）专利检索查询分析平台

序号	专利名	申请号	申请日	公开（公告）号	公开（公告）日	发明人
221		AT445082	1982-12-07	ATA445082A	1983-12-15	GOLDMANN PETER DIPL ING
In recording and/or detecting two different marking signals on or from a record carrier, a generator for marking signals comprises at least one pulse generator which supplies marking signals in the form of two marking-pulse trains M1 and M2 having the same frequency but having different duty factors with the values k and 1-k respectively, which differ from 0.5. A detection circuit for detecting marking signals detects the duty factor of a marking pulse train M1 or M2 respectively and which supplies a specific detection signal in conformity with its detected pulse train.
222	VIDEO RECORD SYSTEMS	DE2964972	1979-11-01	DE2964972D1	1983-04-07	BAILEY JACK HENRY; OTTAWAY GERALD HOWARD
A video record system includes a record disk 12 and a read/write head 19. A signal to be recorded is received on line 15 and processed by a converter26 before being passed to the read/write head 19. A signal read from the disk 12 by the read/write head 19 is passed through a converter 30 and a digital signal processor 32 to a television 14. …In this video record system the length of a mark along a record track 20 on the disk 12 represents a four bit binary storage code block and the player/recorder system operates in eight-bit system code blocks. Thus, two marks on the disk represent a single system code block. The bits of the system code block are assigned to bit positions of the storage code blocks in such a way that there is a reduction in the affect in the associated system of errors in initially writing or subsequently reading a mark. The increments of mark length are also made non-constant to reduce the effect in the associated system of errors in mark length.
223		DE2652437	1976-11-17	DE2652437C3	1982-12-09	HEINZE, ROLAND, DIPL.-ING., 8000 MUENCHEN, DE

224	RECORDING APPARATUS	GB7918587	1979-05-29	GB2022370B	1982-07-21

225		DE3140532	1981-10-13	DE3140532A1	1982-05-27	YANAGIDA TUNEO
A still video signal is modulated to a PDM signal by a pulse duration modulator. The PDM signal is recorded by a perpendicular magnetic recording head on a recording medium of perpendicular magnetic anisotropy according to the perpendicular magnetic recording method. The PDM signal recorded on the recording medium is reproduced by a perpendicular magnetic reproducing head.
226		DE3022573	1980-06-16	DE3022573A1	1981-12-24	SCHOLZ WERNER DIPL ING
In a system for processing PCM signals and transmitting such signals over a channel, which system includes an input portion having a circuit for interleaving arriving data words and supplying the interleaved words to the input end of the channel, and an output portion having a circuit for de-interleaving the data words arriving at the output end of the channel so that the data words, after de-interleaving, are present in the sequence existing before interleaving, the interleaving circuit performs two successive interleaving operations on the arriving data words, and the de-interleaving circuit operates in a manner to complement the interleaving circuit.
227	DEVICE FOR REPRODUCING PULSE INFORMATION FROM MAGNETIC RECORD CARRIER	SU2835463	1979-10-30	SU834745A1	1981-05-30	KILNA ALGIMANTAS-BERNARDAS A; PRUSAKOV VLADIMIR K; ERASTOV VLADIMIR M

228		DE2652437	1976-11-17	DE2652437B2	1981-01-29	HEINZE, ROLAND, DIPL.-ING., 8000 MUENCHEN

229	DEVICE FOR RECORDING AND REPRODUCING PULSE-WIDTH-MODULATED SIGNAL	SU2716574	1979-01-22	SU781903A1	1980-11-23	DEMIN EVGENIJ YU; AZOVTSEV ALEKSANDR; OGIENKO ANATOLIJ S; SMIRNOV SERGEJ YU

230	Recording apparatus	GB7918587	1979-05-29	GB2022370A	1979-12-12
Tape recording device in which a voltage level (Vx) at 15 is compared at 16 with a saw tooth time base signal to produce a square wave signal (C) for recording. The reading derives an output which is proportional to the ratio of the mark length (T1) to the wavelength (T2) of the square wave (C) which is thus independent of slow variations in tape drive speed, enabling use of a single tape drive.
231	MAGNETIC TAPE RECORDING AND REPRODUCTION	GB305177	1977-01-26	GB1551485A	1979-08-30

232	CODE CONVERTER	CA227894	1975-05-28	CA1059238A	1979-07-24	D ORAZIO ROBERT J; SOLOWAY GERALD S
A bitstream encoded in the Aiken or similar selfclocking code is converted to a binary waveform with clocking by apparatus including two spaced apart sensing devices which read the bitstream, a memory circuit for storing the data content of the portion of the bitstream disposed between the sensing devices, and logic circuitry jointly responsive to the memory and sensing devices for determining the data content of the present bit. Timing information is extracted from the bitstream by another logic circuit jointly responsive to the output of one sensing device and to the memory circuit. The apparatus permits conversion independent of reading speed variations.
233	MAGNETOGRAPH RECORD CHANNEL	SU2525619	1977-09-12	SU649025A1	1979-02-25	KUDRYASHOV VIKTOR K; KNYR VLADIMIR M

234	METHOD OF DISCRIMINATING PULSES FROM SIGNALS REPRODUCED FROM MAGNETIC CARRIER	SU2509879	1977-07-18	SU647726A1	1979-02-15	KILNA ALGIMANTAS-BERNARDAS A; PRUSAKOV VLADIMIR K; VAJCHAJTIS IONAS; SIRYK NIKOLAJ YA

235	RECORDING AND PLAYBACK METHOD AND APPARATUS	AU2663577	1977-06-30	AU2663577A	1979-01-04	MUMAKURA TOSHIHIKO

236	APPARATUS FOR MAGNETIC RECORDING AND REPRODUCING OF WIDTH-MODULATED SIGNALS	SU2469377	1977-04-04	SU625236A1	1978-09-25	DOGADOV ALBERT A

237	ARRANGEMENT FOR REPRODUCING PULSE-WIDTH SIGNALS FROM MAGNETIC TAPE	SU2414933	1976-10-26	SU594521A1	1978-02-25	EFREMOV YURIJ N; KASATKIN ALEKSANDR A

238		NL7700797	1977-01-26	NL7700797A	1977-07-29

239		DE2702723	1977-01-24	DE2702723A1	1977-07-28	DALL OGLIO GIORGIO

240		FR7331139	1973-08-28	FR2198317A1	1974-03-29

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