US 5,966,497 A · Magnetic recording and reproducing apparatus

Abstract

When video signals, audio signals, computer data, etc. are recorded in digital fashion on a magnetic tape, the timing at which the control pulse is recorded is set appropriately. The control pulse forming circuit (31) sets a travel distance of the magnetic tape (4) from a position midway of the digital signal pattern (D.sub.2) now being recorded by the 2ch second magnetic head (8b) to the outlet position of the digital signal pattern (D.sub.2) to a .DELTA.X value, when the 2ch first magnetic head (7b) reaches the outlet position of a virtual video signal pattern (V.sub.2), without recording with advance of magnetic tape travel; and further records the control pulse C by shifting the recording timing of the control pulse C by a value corresponding to the .DELTA.X value relative to a prescribed distance X value on the magnetic tape (4).

Drawings

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Drawings

Claims3

Dependent claims

A magnetic recording and reproducing apparatus having an upper compatibility with another magnetic recording and reproducing apparatus comprising:

a first magnetic head pair having predetermined azimuth angles in correspondence to a first channel and a second channel, respectively;
a second magnetic head pair having predetermined azimuth angles different from those of the first magnetic head pair in correspondence to the first channel and the second channel, respectively;
a rotary drum rotated in a state where a magnetic tape is wound helically over a predetermined angle from an inlet position to an outlet position thereof;
a control head for recording a control pulse for each frame on a side edge portion of the magnetic tape;
and,
a control pulse recording section for controlling the control head for recording the control pulse;
a high fidelity audio signal pattern being recorded in analog fashion by the second magnetic head pair on a deep magnetic layer portion of the magnetic tape;
a digital signal pattern being recorded digitally by the second magnetic head pair on a surface magnetic layer portion of the magnetic tape;
a video signal pattern being recorded in analog fashion by the first magnetic head pair on the surface magnetic layer portion formed on the deep magnetic layer portion of the same magnetic tape in superposed positional relationship with respect to the audio signal pattern;
a control pulse being recorded by the control head via the control pulse recording section, when a magnetic head of the first magnetic head pair reaches an outlet position of the video signal pattern, at a position a predetermined distance X value away from the outlet position of the video signal pattern;
and
wherein the digital signal pattern is recorded in digital fashion by use of only the second magnetic head pair at a predetermined inclination angle with respect to a longitudinal direction of the magnetic tape;
and
the control pulse recording section sets a travel distance of the magnetic tape from a position midway of the digital signal pattern now being recorded by a magnetic head of the second magnetic head pair to the outlet position of the digital signal pattern to a .DELTA.X value, when a magnetic head of the first magnetic head pair reaches the outlet position of a virtual video signal pattern without recording with advance of magnetic tape travel;
and further records the control pulse by shifting control pulse recording timing by a value corresponding to the .DELTA.X value relative to a predetermined distance X value on the magnetic tape.

12 more elements

Dependencies are inferred from the claim text.

Description6,682 words

Summary3,333 words

#1. Field of the Invention

#The present invention relates to a magnetic recording and reproducing apparatus, and more specifically to an apparatus for recording and reproducing video signals, audio signals, computer data, etc. on and from a magnetic tape digitally, while keeping an upper compatibility with another magnetic recording and reproducing apparatus of helical scanning type designed in conformity with the well-known VHS standard, S-VHS standard, etc.

#2. Description of the Related Art

Brief description of the drawings12 figures

#FIG. 1 is a plane view showing a related art magnetic recording and reproducing apparatus of helical scanning type;

#FIG. 2(A) is a plane view showing a rotary drum of the same related art apparatus shown in FIG. 1, on which first to third magnetic heads are mounted;

#FIG. 2(B) is a front view showing the rotary drum of the same related art apparatus shown in FIG. 1, on which the first to third magnetic heads are mounted;

Detailed description2,906 words

#An embodiment of the magnetic recording and reproducing apparatus according to the present invention will be described hereinbelow with reference to the attached drawings.

#FIG. 6 shows the magnetic recording and reproducing apparatus of helical scanning type according to the present invention, by which the analog video signal patterns are recorded on the magnetic tape by use of the first magnetic head and the digital signal patterns are recorded on the magnetic tape by use of the second magnetic head, respectively. FIG. 7 shows the vicinity of the rotary drum of the magnetic recording apparatus of helical scanning type according to the present invention, for assistance in explaining a .DELTA.X value and the X value. FIG. 8 shows the status where the video signal pattern and the control pulse are recorded on the magnetic tape, by use of the magnetic recording and reproducing apparatus of helical scanning type according to the present invention. FIG. 9 shows control pulse recording means for recording the control pulse on the magnetic tape, by use of the magnetic recording and reproducing apparatus of helical scanning type according to the present invention. FIG. 10 shows status where the control head is disposed being offset away from the X value position for reasons of design, in the magnetic recording and reproducing apparatus of helical scanning type according to the present invention.

#Further, for the convenience of description, the same reference numerals have been retained for the similar parts or elements having the same functions as with the case of the related art magnetic recording and reproducing apparatus as already explained with reference to FIGS. 1 to 5. That is, only the points different from the related art magnetic recording and reproducing apparatus as already explained will be explained mainly in the following description of the embodiment.

Facts

Application

08/906,934Filed 6 Aug 1997

Priority

JP 9-06253228 Feb 1997

Granted

12 Oct 1999

Term ended

6 Aug 2017

Estimated · how

20 years from earliest known nonprovisional domestic filing. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination. Patent term adjustment is unavailable; no adjustment was added.

Classification4 codes

G11B 15/12
Control of operating function, e.g. switching from recording to reproducing: masking of heads; circuits for Selecting or switching of heads…
G11B 15/087
By sensing features present on or derived from record carrier or container: by sensing recorded signals
G11B 27/32
By using information signals recorded by the same method as the main recording: on separate auxiliary tracks of the same or an auxiliary record…
G11B
Information storage based on relative movement between record carrier and transducer

Description6,682 words

Summary3,333 words

#1. Field of the Invention

#2. Description of the Related Art

Brief description of the drawings12 figures

#FIG. 1 is a plane view showing a related art magnetic recording and reproducing apparatus of helical scanning type;

#FIG. 2(A) is a plane view showing a rotary drum of the same related art apparatus shown in FIG. 1, on which first to third magnetic heads are mounted;

#FIG. 2(B) is a front view showing the rotary drum of the same related art apparatus shown in FIG. 1, on which the first to third magnetic heads are mounted;

Detailed description2,906 words

#An embodiment of the magnetic recording and reproducing apparatus according to the present invention will be described hereinbelow with reference to the attached drawings.

Magnetic recording and reproducing apparatus

Life of this patent

Magnetic recording and reproducing apparatus

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims3

Description6,682 words

Drawings

Classification4 codes

Life of this patent

Description6,682 words