Magnetic recording and reproducing system专利检索-奇数场图形技术专利检索查询-专利查询网

Magnetic recording and reproducing system

阅读：555发布：2022-11-04

专利汇可以提供Magnetic recording and reproducing system专利检索，专利查询，专利分析的服务。并且In a system in which chrominance signals are recorded only during alternate line intervals and in which the reproducing apparatus forms a replica of each line interval of recorded chrominance signals and uses that replica during a line interval when no chrominance signal is recorded, a pattern of bright areas in the reproduced picture is made less objectionable by redistribution. The signals are prepared for recording by converting the chrominance signals to a specific, relatively low frequency band and by frequency modulating a somewhat higher frequency carrier by means of the luminance signal. The objectionable pattern of bright areas is caused by the second harmonic of the frequency-converted chrominance carrier. These areas are shifted into less noticeable positions by generating the converted carrier to have a frequency that is approximately 1/8 of an odd number times the line scanning frequency. The spots may be made even more unnoticeable by a further slight shift in position from one field to the next in each group of four successive fields.，下面是Magnetic recording and reproducing system专利的具体信息内容。

权利要求

1. A system for magnetically recording color television signals, said system comprising: A. means to convert the frequency of chrominance components of the signals to a relatively low frequency band such that the chrominance carrier has a frequency fc determined substantially by the equation fc 1/8 (2m-1)fH, where m is a suitable positive integer and f is the horizontal scanning frequency of the signals, and B. means to record successive field intervals of the signals on adjacent parallel tracks on a magnetic tape in H alignment, said means recording the chrominance components during alternate line intervals only, of each of said tracks and in such relation to adjacent tracks that each line interval in which chrominance components are recorded in one of said tracks is side-by-side with a line interval in which shrominance components are not recorded in the next adjacent one of said tracks.

2. The system of claim 1 in which said means to convert the frequency of chrominance components comprises means to shift said carrier frequency to a frequency fc determined by the equation fc 1/8 (2m-1)fH + or - fV/4 where fV is the field repetition frequency of the television signals.

2. means to generate a signal having a frequency fs+fc where the frequency fc is substantially determined by the equation fc 1/8 (2m-1)fH, where m is a positive integer and fH is the horizontal scanning frequency of the television signals.

3. The system of claim 1 in which said means to record comprises: A. recording head means; and B. gating means, said recording head means being connected to said gating means to record the chrominance components only during alternate line intervals.

4. The system of claim 1 comprising, in addition: A. means to pick up the signals recorded on said tape; B. means to delay each line interVal of chrominance components for an odd integral multiple of a line interval to form a delayed replica; and, C. means to utilize said chrominance components and said delayed replicas in the reproduction of a color television image.

5. A color television image reproducing system comprising: A. magnetic signal pickup means to pick-up signals recorded in parallel tracks on magnetic tape and in H alignment, chrominance components of the signals being recorded only in alternate line intervals; B. means to delay each line interval of chrominance components by an odd integral multiple of a line interval to form a delayed replica thereof; and C. means to utilize said chrominance components and said delayed replicas in the reproduction of a color television image, said last-named means comprising:

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