Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N9/00—Details of colour television systems
  • H04N9/79—Processing of colour television signals in connection with recording
  • H04N9/87—Regeneration of colour television signals
  • H04N9/898—Regeneration of colour television signals using frequency multiplication of the reproduced colour signal carrier with another auxiliary reproduced signal, e.g. a pilot signal carrier
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
  • G11B20/02—Analogue recording or reproducing
  • G11B20/06—Angle-modulation recording or reproducing
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
  • G11B20/10—Digital recording or reproducing
  • G11B20/10527—Audio or video recording; Data buffering arrangements
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N5/00—Details of television systems
  • H04N5/76—Television signal recording
  • H04N5/78—Television signal recording using magnetic recording
  • H04N5/782—Television signal recording using magnetic recording on tape
  • H04N5/78213—Television signal recording using magnetic recording on tape involving recording in different depths of the magnetic tape
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N9/00—Details of colour television systems
  • H04N9/79—Processing of colour television signals in connection with recording
  • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
  • H04N9/802—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving processing of the sound signal
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N9/00—Details of colour television systems
  • H04N9/79—Processing of colour television signals in connection with recording
  • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
  • H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
  • H04N9/83—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal
  • H04N9/835—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal involving processing of the sound signal
  • H04N9/8355—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal involving processing of the sound signal the sound carriers being frequency multiplexed between the luminance carrier and the chrominance carrier

Definitions

• the present invention is suitably applied to, for example, a tread head type VTR (video tape recorder) that records and reproduces a signal obtained by frequency-modulating (TM) modulating an audio signal on a magnetic tape with a video signal.
• VTR video tape recorder
• the present invention relates to a magnetic recording / reproducing device.
• FIG. 1B shows the frequency spectrum.
• Video signal and slope preparative rack with frequency multiplexing between the luminance signal Y FM and the low frequency converted click port Ma signals C D of the sound signal is FM-modulated It is proposed to record it at The A F M in FIG. 1 B is an audio signal which is FM-modulated.
• the carrier frequency is fLl (the first track). with respect to the first audio signal to be recorded to click), for f R i (first door rack in the serial second audio signal is recorded),! ⁇ 2 (the second adjacent to the first door rack 2) (for the first audio signal recorded on the second track) and ⁇ ⁇ 2 (for the second audio signal recorded on the second track). It is about 150 KHz. Therefore, a wide band of about 600 KHz is necessary for the FM signal YFM.
• the carrier frequency of the modulated luminance signal YFM can be increased, compatibility of the video signal with a normal method (the frequency spectrum is shown in FIG. 1A) becomes difficult. Further, et al or by Les Bell modulated audio signal A F M is Ru limited, the audio signal S // N is lower degradation.
• the present invention has first to fourth magnetic heads, and the third and fourth magnetic heads have a 7 ° width of the first magnetic head.
• the magnetic heads are referred to as first and second magnetic heads, respectively.]
• the head is scanned over the magnetic recording medium in advance, and the first and third magnetic heads are used for recording and reproduction.
• the fourth magnetic head and the fourth magnetic head are alternately used every unit period.
• the first signal is supplied to the first and second magnetic heads, and the third and fourth magnetic heads are supplied.
• the second signal is supplied to the fourth magnetic head, and the first and second signals are recorded on the magnetic recording medium in a superimposed manner. i? When the first signal is reproduced by the head to the first and second magnetic heads
• the second signal is reproduced by the third and fourth magnetic heads.
• FIG. 1 is a diagram showing a frequency spectrum of a recording signal
• FIG. 2 is a diagram showing a rotating head device in one embodiment of the present invention
• FIG. 3 is a diagram showing a rotating magnetic head.
• FIG. 4 shows recording C on a magnetic tape.
• FIG. 5 is a diagram for explaining a recording state on a magnetic tape
• FIG. 6 is a circuit configuration diagram of one embodiment of the present invention
• FIG. 7 is another embodiment of the present invention.
• FIG. 3 is a circuit configuration diagram showing an example. BEST MODE FOR CARRYING OUT THE INVENTION
• (1) shows a magnetic tape, and the tape is driven in the Y direction along a tape guide drum (2) obliquely over an angle range of approximately 180 °.
• crosstalk ratio due to the magma loss is defined as: crosstalk: signal, S, recording wavelength, track width, W, and relative azimuth angle.
• the width of the SA2 is head, the breadth is bitter Te obtained comparing to the width of the gears-up gyi and gV2 of ⁇ and H V2 to.
• the width of gA2 is assumed to be 1.5 to 2.0 Am.
• the magnetic tape can be recorded on a 7 ° magnetic layer at a depth of approximately half the gap width of the magnetic head.
• For wide-Ku to to is, to i head H V i and signal recorded by H V2]), towards the signal recorded by the heads H A1 and H A2, in order to record rather magnetic layer depth of the magnetic tape.
• the head H V i, H V2, H A1, H A2 to, are for example, by one revolution in 1 full record over arm.
• the heads HAI and Hvi and the heads HA2 and HV2 are alternately scanned on the magnetic tape (1) for each field.
• Head H A1 and H A2 can this and scans the magnetic tape (1) above with the prior to each in head H V1 and Hv2.
• the composite signal of SpiLOT is recorded in different recording formats. That is, Remind as in Figure 5 A is the head H A1 and Ka shows the I that recording preparative rack Ti in H V1, same as the this section observation Shitemi Ru Fig B, or to not a the head HAI Therefore modulated audio signal ALFM, a RF M and c.
• Lee Lock preparative synthesis signal of the signal SpiLOT is recorded deep Ku or the magnetic layer of the magnetic tape (1) (la), then low-band converting chrominance signal C D and I by the head H V1 to A composite signal of the modulated luminance signal YFM is recorded shallowly on the magnetic layer (la). It should be noted, it is the same even if the door rack T 2 smell. In Fig. 5 ⁇ , (lb) is the pace.
• H V2 is made to the Let 's you scan each record door rack Ti and T 2.
• the head Eta Alpha in ⁇ and Eta [alpha] 2, respectively recorded preparative rack Ti and T 2 O]) modulated audio signal A LFM, ARFM and c.
• Synthetic signal of I Lock Bok signal S PIL oT is played.
• record tracks on heads H V1 and H V2 respectively ! ⁇ And T 2 good low band converted chrominance signal C D and the synthesized signal of the modulated luminance signal YFM is reproduced.
• FIG. 6 shows the recording and reproducing circuits in this example.
• (100 V) is a video signal recording system circuit] 9, and a video signal s v is supplied to a terminal ⁇ .
• the video signal S v is the luminance signal Y is obtained is supplied to the B over 'C ° scan full I filter (12), through its Koregapu Li et down off ⁇ shea scan circuit to the FM modulator (14) Supplied.
• the FM modulator (14) for example, the luminance signal Y is modulated such that the white peak is 4.8 MHz and the sink 7 ° is 3.6 MHz, and the modulated luminance signal is modulated.
• YFM is obtained.
• This modulated Hunch signal YFM is band-suppressed through a high-frequency filter (15), further amplified by an amplifier (16), and supplied to a combiner (17). You.
• the video signal s v supplied to the terminal ⁇ ) is a band.
• the color signal C is obtained by being supplied to the filter (18) and supplied to the frequency converter 9).
• the frequency converter (19) of this, the oscillation circuit (2 I]) signal for conversion is supplied, the low-band converting chrominance signal C D of the transfer frequency, for example, 6 8 8 KHz is Ru obtained.
• This low-frequency conversion color signal C D is band-limited through a ⁇ - zero filter (21), further amplified by an amplifier (23), and supplied to a synthesizer (17). You.
• the synthesized signal of the modulated luminance signal YFM and the low-frequency converted color signal CD obtained from the synthesizer (17) is passed through the switching switch (23) and the rotary relay (24). to co when supplied to the head H V 1, is supplied to Setsu ⁇ Su I pitch (25) and (b) over data Li one preparative run-scan ⁇ ) through Ji to Tehe' de H V 2.
• the switching switches ⁇ and (2 are connected to the R side during recording, and are connected to the P side during playback. Continued.
• (100A) is a circuit for recording the audio signal]
• terminals (30L) and (30R) are the first audio signal.
• a L and second audio signal (right signal for stereo, sub signal for double audio) AR are supplied.
• a LFM is a port for removing harmonics. Filter or bandha. It is supplied to the synthesizer (34) through the filter (33L). Also, the second audio signal A R is supplied to the terminal (30 R) or al Bruno size b Li Da click compressing circuit constituting the Yo down circuit (31R) and passing Ji by the FM modulator (32R). And this FM modulator
• the first audio signal A R is, for example, a carrier frequency 1.50 MHz, the frequency shift is FM-modulated with soil 75 KHz, modulated audio signal ARFM is obtained.
• This modulated audio signal ARFM is supplied to the synthesizer (34) through a mouth filter or a band filter (33R) for removing harmonics.
• O PI Oscillator for An oscillation signal of about 5 to 15 MHz is obtained from the oscillator (35), and this is supplied to the synthesizer (34) as a bias signal SBIAS.
• (36) is an oscillator for obtaining a zero pilot signal SPILOT for -cutter correction. From this oscillator (35), varying articulation voice signal A L FM, frequency close to the carrier frequency of the ARFM, the oscillation signal of, for example, 1.7 MHz obtained, synthesizer as a Koregaha ° I Lock preparative signal SPILOT (34 ).
• modulated audio signal ALFM, AR F M are bus b A scan signal SBIAS and Bruno Lee Lock preparative signal S PIL 0T mosquitoes synthesis. Then, this synthesized signal is amplified by an amplifier (37), and then supplied to a head HAI via a switching switch (38) and an oral transformer (3SI). composite signal changeover sweep rate Tutsi (40) and (b) over data re -. fed preparative run-scan (41) the passing Jitehe' de H A2 Setsu ⁇ Su I Tsu Chi (38) and measurement, respectively Connected to the R side during recording, and connected to the P side during playback.
• a composite signal of YPM (see Fig. 1C) is supplied.
• Tsu is the de H A1 and HAS modulated audio signal A LFM, A RFM, c ° I Lock preparative signal SPILOT combined signal (first reference Figure C) and high-frequency pi ⁇ scan signal S BI AS is supplied to the You. Therefore, 4 Remind as in FIG, on the magnetic tape (1) is 1 alternately every full I Lumpur preparative ,,, f head, Eta Alpha 1, recording preparative rack Ti and F that by the ⁇ head, hAS, record door rack T 2 that by the H V2 is sequential form.
• (200 V) is a circuit of a video signal reproducing system.
• the composite signal of the low-band conversion color signal CD and the modulated luminance signal YFM reproduced by the recording track Ti and the head ⁇ passes through the amplifier (50 ⁇ ). It is supplied to the switch circuit (51). Also synthetic signal recording preparative rack T 2 O] to 5 reproduced by head Hv 2 downconverted Iroshin No. C D and modulated luminance signal YFM in cormorants I described above, the amplifier (50 2) It is supplied to the switch circuit (51) through the switch.
• the Switch I Tsu switch circuit (5, by the terminal (51 a)]? Head H V 1 and switching control signal Sc obtained depending on the rotational position of Hv2 its switching is supplied is controlled to. Its to, the scan I latch circuit (51) or colleagues, head H V1 and synthesis signal reproduced by H V 2 are obtained alternately every full I Lumpur de to.
• This switch circuit (51)] 9 The resulting composite signal is high.
• the modulated luminance signal YFM is supplied to the filter (52), and the high luminance filter (52) obtains the modulated luminance signal YFM.
• This modulated luminance signal YFM is supplied to an FM demodulator (5) through a limiter circuit (53), and an i? Luminance signal Y is obtained from the FM demodulator (54).
• Y is supplied to the synthesizer (56) through the de-emphasis circuit (55).
• the synthesized signal obtained from the switch circuit (51) is one-way. It is supplied to the scan full Note1 (57), the mouth one cog 0 scan full Note1 (57) good low-band converted chrominance signal C D is obtained.
• the low-band converted chrominance signal C D is Kyoawase the frequency converter (58).
• the frequency converter ⁇ the AFPC circuit (automatic frequency and phase control circuits) is (59) by]?
• Signal for conversion is supplied, the low-band converting chrominance signal C D is the carrier frequency, for example 3.58 MHz chrominance signal C Is converted to The chrominance signal C is supplied to the synthesizer (56) through the bandpass filter (60).
• the luminance signal Y and the color signal C are synthesized, and the video signal Sv is obtained at the output terminal (61).
• (200 A) is a circuit for a reproduction system of an audio signal.
• the recording track 1) The composite signal of the modulated audio signals A LFM and A RFM reproduced by the FH A1 and the pilot signal Sp IL OT is passed through the amplifier (70 ⁇ ). , the center frequency is supplied to the bar down de Notasu off I filter of generally 1.35 M Hz (71Li), pan Doha 0 scan full Note1 center frequency is approximately 1.50 MHz (71 R ⁇ ) Supplied to Bandha.
• a modulated voice signal A LFM is obtained from the filter (71L i), and is supplied to an FM demodulator (73L) through a limiter circuit (72L). This FM demodulator ( 73Li), the first audio signal AL is obtained and supplied to the terminal on the A side of the switch circuit (74L), and the bandha filter (71R or Obtain the modulated audio signal A RF M,
• I Lock composite signal DOO signal SpiLOT is through its amplifiers (70 2), Ba emissions Doha the center frequency is substantially 1.35 MH z.
• Scan full Note1 (71 L 2) both when being supplied to the center frequency is supplied to the bar down de Ha 0 scan full Note1 of generally 1.50 MH z (71 R 2) .
• Ba emissions de data scan full Note1 (71 L 2) or we modulated audio signal ALFM is obtained which is supplied to the re-mission-capacitor circuit (72L 2) the passing Ji and FM demodulator (73L 2) .
• OMPI De period is switched to the terminal of the A side, head H A2 is other 1 Fi Lumpur de period you are scanning the recording preparative rack T 2 are switched on ⁇ side terminal to.
• the first audio signal A L obtained is obtained, et al are alternately every full I Ichiru de, which is supplied to a combiner (75L).
• Second audio signal Alpha beta is obtained alternately every full I Lumpur de give et be, and is supplied to a combiner (75R).
• synthesis signals reproduced by heads Eta Alpha iota is supplied to an amplifier (70Iota) the passing Ji by scan I Tutsi circuit (76). Further, synthesis signal reproduced by head Eta Alpha 2 to is supplied to an amplifier (70 2) through scan I Tsu switch circuits (76). The switch (76) is also supplied with the D switching control signal Sc from the terminal (76a) to control the switching.
• This jitter detection signal SJI is inverted by the inverter (80), and then each of the semi-fixed resistors for level adjustment is used.
• the signal corresponding to the cutter detection signal SJJ is subtracted from the second audio signal AR supplied from the switch circuit (74R). If present, the cutter component is offset. Therefore, a second audio signal having a high cutter component is obtained from the synthesizer (75R), and the second audio signal is transmitted through the expander (82R) constituting the noise reduction circuit.
• the output signal (83R) is supplied to the output terminal (83R).
• the recording preparative rack Ti and tau 2 is a combined signal of the low frequency converted color signal c D and modulation Brightness signal YFM, the synthesis of the modulated audio signal ALFM, A RFM and Lee port Tsu preparative signal Spi L0 T The signal and are recorded in different recording azimuths.
• Eta Alpha 2 and H V2 are scanned respectively recording preparative rack and T 2. Then , in the heads # 1 and # 2 , the recording tracks Ti and # 2 are used to record the U-modulated audio signals ALFM, A RFM and C, respectively. Synthetic signal of I Lock door signal S PI LOT is played. In addition, the head ⁇ and H V2, respectively recording preparative rats by click Ti and T 2]? Low-band converting chrominance signal C D and modulation luminance signal YFM is reproduced. Therefore, the output terminal (61) is a video signal Sv is obtained, et al is, the output terminal (83L) and (83R), the first audio signal A L and the second speech respectively jitter Kazunari partial removal The signal AR is obtained.
• the width of the gear-up g A1, g A2 of the modulated audio signal A LFM, recording and reproducing ARFM like Surue' de H A i, H A2 is low-band converted chrominance signal C D and modulation intensity Synthesis of signal YFM
• modulated audio signal ALFM head to the recording and to play ARFM
• a Ma the angle of H A1 and H A2 is occupied et al different rather than size Runode, adjacent Bok rack or these click Russia scan It produces almost no talk.
• modulated audio signal ALFM A RF M carrier frequencies adjacent preparative rat must occupy different et between click is rather name
• modulated audio signal ALFM it is necessary and this you a wide Ku band occupied by the A RFM It becomes bad. So, for example,
• OMPI IPO In addition to modulated audio signals A LFM and ARFM, jitter correction c. It becomes possible to record the pilot signal Sp IL0T .
• FIG. 7 shows another embodiment of the present invention, in which a PCM signal of an audio signal is recorded instead of a modulated audio signal.
• parts corresponding to those in FIG. 6 are denoted by the same reference numerals.
• record reproducing circuit of the video signal S v is omitted in the Ru der similar to Figure 6.
• (300A) indicates a recording system circuit.
• the first audio signal A L and the second audio signal A R are supplied to the terminals (90L) and (90R), respectively, and the A-D converters (91L) and (91R) respectively provide, for example, a 16-bit signal.
• the multiplexer (92) After being converted to a digital signal, it is supplied to the multiplexer (92) and time-division multiplexed.
• This time-division multiplexed signal is supplied to the encoder (93), which is incorrect.) Are added, interleaving, etc. are performed.
• the signal from the encoder (93) is supplied to a parallel Z serial conversion circuit (94) and is converted into serial data.
• the serial data is converted into this serial data.
• the resulting signal is supplied to a signal processing circuit (95), subjected to time axis compression and addition of a synchronization signal, and then supplied to an encoder (96).
• 3 PM in (96), F 2 M, the modulation that by the form of the FM like performed, P CM signal APCM of recorded Ru audio signal is formed.
• the PCM signal a PCM is amplified by an amplifier (97) after being, subjected switching scan I Tsu switch (38) and (b) over data rie preparative run-scan the (39) in passing Jitehe' de Eta Alpha iota While it is fed switching scan I pitch (40) and (b) over the data rie preparative run-scan (41) the through Ji and supplied to the head H A2.
• the head HAI and H A2 to the recording than the P CM signal A PCM audio signal is supplied, the recording bets formed on the magnetic tape (1) rack Tauiota, the T 2, the recording overlaid by P CM signal Ap CM Togaotto s different that recording ⁇ Uz Ma scan of the low frequency converted color signal C D ⁇ beauty combined signal and the audio signal of the modulated luminance signal YFM Is done.
• (400A) is a reproduction system circuit. It's a recording track T1! ) To head, P CM signal A PCM audio signal reproduced by H A1 is fed to an amplifier (98Iota) through Ji to the scan I latch circuit (99). Also, record door rack T 2 O]? To the head H A2 PCM signal Ap CM-increasing Fu device of the audio signal reproduced by the (98 2) through Ji is a scan I Tsu Chi times ⁇ (99) Supplied to Scan I Tsu switch times ⁇ (99) has its switching I by the switching Goshin No. S c supplied by the terminal (99 a) is controlled. Their to, P CM signal A PC M of the scan I star latch circuit (99) or colleagues to head H A i and the audio signal reproduced by H a2 are alternately every full I Lumpur de can get .
• PCM signal Ap CM of the scan I star latch circuit (99) good yield, et al are audio signals are supplied after having been shaped by a waveform shaper noodles click lock signal generator (101) and Deco chromatography Da (102) You.
• the clock signal generator (101) the bit clock signal, synchronization signal, etc. required in each part of the circuit are formed.
• the signal demodulated by the decoder (102) is processed by the signal processing circuit.
• serial Zha After the time axis is extended at (103), serial Zha.
• the data is supplied to a parallel conversion circuit (104), converted into half-relaxed data, and time-base corrected by a TBC (time-pace collector) circuit (105).
• the signal from the TBC circuit (105) is supplied to a decoder (106), and a deinterleave and an error correction are performed.
• the signal from the decoder (106) is supplied to a demultiplexer (107) and separated into a first audio signal AL and a second audio signal AR.
• the first audio signal A L is supplied to the output terminal (109L) Through D-A converter (108L).
• the second audio signal An is supplied to the output terminal (109R) through the DA converter (108R).
• the seventh illustrated example is configured to cormorants yo above, the P CM signal A PC M of the audio signal is satisfactorily reproducing. In addition, this
• the PCM signal A PCM has, for example, a band in the range shown by the broken line Fo in FIG. 1C.
• HAI and H A 2 are head to respectively be Do Ni will by preceding ⁇ and Itanyu 2, and the PCM signal A P CM of the audio signal, the low-band converting chrominance signal C D and modulated luminance signal synthesized signal and have different magnetic layers in recording ⁇ Ma scan of YFM of being recorded superimposed on (1 a), although a wide band of the PCM signal Ap C M of the audio signal a low-band converting chrominance signal C It has little effect on the recording and reproduction of the composite signal of D and the modulated luminance signal YFM.
• Te seventh illustrated example smell this, even Nodea Luke et PCM signal Ap CM audio signal is recorded and reproduced, even good good a first audio signal A L and the second audio such SZN Ru is possible to get a signal a R. Further, with regard to the compatibility of the video signal Sv, the same operation and effect as those of the above-described embodiment can be obtained.
• the gap widths of the third and fourth magnetic heads for recording and reproducing the second signal are equal to the first and second magnetic heads for recording and reproducing the first signal.
• the gap width of the magnetic head of the second magnetic head is wider than that of the magnetic head of the third and fourth magnetic heads, and the angle of the magnetic head of the first and second magnetic heads is larger than that of the magnetic head.
• the third and fourth magnetic heads are arranged to precede the first and second magnetic heads, respectively, so that the first and second magnetic heads are respectively different from the first and second magnetic heads.
• the signal of the second signal is recorded on the magnetic layer of the magnetic recording medium in a superimposed manner with a different recording radius, so that the band occupied by the second signal is wide, and even if the level is high, the recording of the first signal is possible. Usually shadows for playback
• the first signal is a low-frequency conversion chrominance signal, a modulated luminance signal, and the second signal is a modulated audio signal
• recording is performed without limiting the level of the modulated audio signal. Therefore, it is possible to improve the SZN of the audio signal.
• the low-frequency conversion color signal and modulated luminance signal can be recorded and played back in the normal format, and the video signal can be maintained compatible with the normal format.
• the present invention is applied to the above-mentioned rotary head type VTR. If there is almost no crosstalk between adjacent tracks, it is not necessary to increase the occupied bandwidth of the modulated voice signal to eliminate crosstalk. Become. Therefore, in addition to the modulated audio signal, a high-pitched signal for zotta correction or the like can be recorded.
• the present invention is applied to the tillage head type VTR, but the fixed head type VTR is used.
• VTR VTR
• present invention can be similarly applied to a case where a magnetic disk is used as a magnetic recording medium instead of a magnetic tape.
• the voice signal and the modulated luminance signal are recorded in this order using three separate magnetic heads so that the magnetic layer has three layers.
• the azimuth angles are different from each other, but in consideration of compatibility with the normal method, the magnetic heads for the low-frequency conversion color signal and the modulated luminance signal are the same. It is better to have an a-mass angle.
• other information for example, information such as characters and patterns may be recorded and reproduced in the same manner.

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• Engineering & Computer Science (AREA)
• Signal Processing (AREA)
• Multimedia (AREA)
• Television Signal Processing For Recording (AREA)
• Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)

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ID=16618109

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Citations (5)

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• 1982
  • 1982-12-03 JP JP57212173A patent/JPS59103478A/ja active Granted
• 1983
  • 1983-12-01 WO PCT/JP1983/000424 patent/WO1984002219A1/ja unknown

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Non-Patent Citations (1)

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