G - Physics – 11 – B
Patent
G - Physics
11
B
352/11
G11B 15/02 (2006.01) G11B 15/18 (2006.01) G11B 27/029 (2006.01)
Patent
CA 2003195
ABSTRACT OF THE DISCLOSURE 33528 A video tape recording apparatus having a tape guide drum with a cylindrical outer surface for guiding a magnetic tape in a helical fashion on the outer surface, and a pair of rotary magnetic heads rotating at a predetermined speed and provided in association with the tape guide drum for scanning skewed parallel tracks on the magnetic tape is specially adapted to perform after recording or dubbing. Each of the tracks is formed having a length to accommodate a pair of audio portions and a center video portion provided between the pair of audio portions. Rotational angles of the rotary magnetic heads corresponding to the length of the audio portions and the center video portion are expressed as follows, ea + ev = eb + .THETA.v = 180° where .THETA.a and .THETA.b correspond to the audio portions and .THETA.v corresponds to the center video portion, respectively. In the case of audio after recording, selected audio portions are left blank during the initial recording operation and the after recording audio signal is recorded therein at a later time.
Gowling Lafleur Henderson Llp
Sony Corporation
Yamashita Keitaro
LandOfFree
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