Signal translating apparatus for composite signal subject to jitter
阅读：592发布：2023-11-07
专利汇可以提供Signal translating apparatus for composite signal subject to jitter专利检索，专利查询，专利分析的服务。并且Circuits are disclosed for processing color encoded video signals, encoded per a format wherein a chrominance signal in the form of a modulated subcarrier is buried in spectrum ''''troughs'''' in the midband of a wider band luminance signal, an illustrative use of the encoding format being in video disc recording. The processing circuits serve, in use with composite signals developed during video disc playback, to convert an input composite signal of buried subcarrier format to an output composite signal of NTSC format. Comb filtering is employed to separate buried subcarrier chrominance signal from midband luminance signal components. A heterodyning step preceding comb filtering is performed in a manner substantially precluding ''''jitter'''' of played back signals from disturbing accuracy of comb filter separating action, enabling use of a single 1H delay line form for the comb filter and enabling use of a relatively inexpensive, narrowband structure for the single delay line. The comb filter output provides a chrominance signal in a band suitable for output composite signal use. The output chrominance signal is also used in a subtractive process to effect comb filtering of the luminance signal to remove therefrom midband chrominance signals.，下面是Signal translating apparatus for composite signal subject to jitter专利的具体信息内容。
1. A color image signal translating system comprising, in combination: means for providing an input composite signal including (a) a signal representative of the chrominance of a color image and occupying only a given frequency band, and (b) a signal representative of the luminance of said color image and including a first luminance signal portion occupying said given frequency band and additional luminance signal portions having frequencies outside said given frequency band; said first luminance signal portion including signal components normally subject to occupancy of only a first plurality of regularly spaced spectral locations extending over said given frequency band, and said chrominance signal including signal components normally subject to occupancy of only a second plurality of spectral locations interleaved with said first plurality; said composite signal providing means being subject to abnormal operation causing spurious variations of the frequencies of said signal components about said normally occupied spectral locations; a source of oscillations means for varying the frequency of the oscillations provided by said source about a nominal value in synchronism with said spurious variations during abnormal operation of said composite signal providing means; means for heterodyning oscillations provided by said source with at least the portion of said composite signal occupying said given frequency band; means for deriving an output from said heterodyning means inclusive of a frequency shifted chrominance signal occupying a frequency band different from said given frequency band, and a frequency shifted luminance signal portion corresponding to said first luminance signal portion and sharing said different frequency band; and a comb filter responsive to said output derived from said heterodyning means for passing said frequency shifted chrominance signal to the substantial exclusion of said frequency shifted luminance signal portion.
2. Apparatus in accordance with claim 1 also including: means for utilizing the signals passed by said comb filter to derive from said composite signal a signal output inclusive of said luminance signal to the substantial exclusion of said chrominance signal.
3. Apparatus in accordance with claim 2 also including: means for combining the signal output derived by said signal utilizing means with the signals passed by said comb filter to form an output composite signal having a chrominance signal occupying said different frequency band.
4. Apparatus in accordance with claim 3 wherein said comb filter includes a delay line having a passband encompassing said different frequency band and of a narrower bandwidth than the bandwidth of said luminance signal.
5. Apparatus in accordance with claim 1 wherein the frequency response characteristic of said comb filter exhibits a multiplicity of nulls at a third plurality of regularly spaced spectral locations in said different frequency band differing from said nominal value of oscillation frequency by respective frequency values corresponding to said first plurality of spectral locations.
6. In a color image signal translating system comprising a source of an input composite signal including a luminance signal occupying a wide band of frequencies, and a chrominance signal occupying only an intermediate portion of said wide band, the combination comprising: a voltage controlled oscillator having an output of a frequency determined by a control voltage input; means for modulating the output of said oscillator with said input composite signal to develop a modulated carrier output having a sideband in which said chrominance signal occupies an intermediate portion; a comb filter having a single 1H delay line, and means for subtractively combining the input and output of said delay line, the passband of said delay line encompassing only a portion of said sideband inclusive of said intermediate portion; means for applying said modulated carrier output to the input of said comb filter, said applying means having a passband encompassing said intermediate portion of said sideband to the exclusion of the remainder of said sideband; chrominance signal utilization means responsive to the output of said comb filter; and means for rendering the control voltage input to said oscillator responsive to spurious variations of input composite signal frequencies.
7. Apparatus in accordance with claim 6 wherein said chrominance signal utilization means includes means for subtracting the output of said comb filter from said modulated carrier output to provide a combed version of said sideband, and detecting means responsive to the output of said subtracting means for deriving from said combed sideband an output signal inclusive of said luminance signal to the substantial exclusion of said chrominance signal.
8. Apparatus in accordance with claim 7 also including means combining the output of said comb filter with the output of said detecting means to form an output composite signal.
9. In combination with playback apparatus for deriving from a video disc record a composite video signal including a luminance signal occupying a wide band of frequencies, and a chrominance signal occupying only an intermediate portion of side wide band, a signal translating system comprising: a voltage controlled oscillator having an output of a frequency determined by a control voltage input; means for rendering the control voltage input to said oscillator responsive to spurious frequency variations of said chrominance signal; means for modulating the output of said oscillator with said composite signal to develop a modulated carrier output having a sideband in wHich a frequency shifted version of said chrominance signal, substantially free of said spurious frequency variations, occupies an intermediate portion; said intermediate portion of said sideband lying above said wideband; a 1H delay line responsive to the output of said modulating means, the passband of said delay line encompassing only a portion of said sideband inclusive of said intermediate portion; first comb filter means, including a signal combiner responsive to the input and the output of said delay line, for passing said frequency shifted version of said chrominance signal to the substantial exclusion of luminance signal components; means for developing from said composite signal a wideband output signal occupying said wide band of frequencies, and comprising luminance signal components to the substantial exclusion of chrominance signal components; and means for combining the wideband output signal of said developing means with the frequency shifted version of said chrominance signal passed by said first comb filter means to form an output composite signal having luminance and chrominance signals in respective non-overlapping frequency bands.
10. Apparatus in accordance with claim 9 wherein said wideband output signal developing means includes: means for heterodyning the output of said oscillator with said output of said first comb filter means; and second comb filter means, including means for subtracting an output of said heterodyning means from the composite signal derived from said record, for passing luminance signal components to the substantial exclusion of chrominance signal components.
11. Apparatus in accordance with claim 9 wherein said chrominance derived from said video disc record includes a modulated color subcarrier accompanied by a color synchronizing component comprising period bursts of subcarrier oscillations, and wherein said means for rendering the control voltage input to said oscillator responsive to spurious frequency variations of said chrominance signal responds to a frequency shifted version of said subcarrier oscillations bursts derived from an output of said modulating means.
12. Apparatus in accordance with claim 1 also including: means for developing from said input composite signal a wideband output signal occupying a wide band of frequencies encompassing said given frequency band, and including said first luminance signal portion and said additional luminance portions to the substantial exclusion of chrominance signal components; and means for combining said wideband output signal with the frequency shifted chrominance signal output of said comb filter to form an output composite signal.
13. Apparatus in accordance with claim 12 wherein said comb filter includes a single 1H delay line having a passband narrower than said wide band and lying above said wide band; and wherein said wideband output signal developing means includes a second comb filter utilizing said single 1H delay line to reject said chrominance signal components.
14. Apparatus in accordance with claim 13 wherein said second comb filter includes: means for heterodyning the output of said source of oscillations with the frequency shifted chrominance signal output of said first-named comb filter; and means for subtracting an output of said heterodyning means from said input composite signal.
15. Apparatus in accordance with claim 13 wherein said second comb filter passes said frequency shifted luminance signal portion to the substantial exclusion of said frequency shifted chrominance signal, and wherein said wideband output signal developing means also includes frequency shifting means responsive to the output of said second comb filter for returning said frequency shifted luminance signal portion to said given frequency band.
| 标题 | 发布/更新时间 | 阅读量 |
|---|---|---|
| 一种无烟艾灸黄泥丸及其制备方法 | 2020-05-08 | 892 |
| 一种侧链含叔胺基的主链嵌段氨基硅油的制备方法及应用 | 2020-05-08 | 612 |
| 一种低损耗干式变压器 | 2020-05-08 | 482 |
| 多角度碳纤维预制体编制方法 | 2020-05-08 | 60 |
| 中空壁结构玻璃钢管道及其制作工艺 | 2020-05-08 | 147 |
| 桥梁伸缩缝的防水结构及桥梁伸缩缝的防水方法 | 2020-05-08 | 207 |
| 一种梳理制条机用转向输送制条装置 | 2020-05-08 | 81 |
| 一种扫地机的清洁工具 | 2020-05-11 | 66 |
| 一种黑茶加工装置 | 2020-05-11 | 558 |
| 一种茶叶加工用烘干机 | 2020-05-11 | 888 |
高效检索全球专利专利汇是专利免费检索,专利查询,专利分析-国家发明专利查询检索分析平台，是提供专利分析，专利查询，专利检索等数据服务功能的知识产权数据服务商。
我们的产品包含105个国家的1.26亿组数据，免费查、免费专利分析。
分析报告
专利汇分析报告产品可以对行业情报数据进行梳理分析，涉及维度包括行业专利基本状况分析、地域分析、技术分析、发明人分析、申请人分析、专利权人分析、失效分析、核心专利分析、法律分析、研发重点分析、企业专利处境分析、技术处境分析、专利寿命分析、企业定位分析、引证分析等超过60个分析角度，系统通过AI智能系统对图表进行解读，只需1分钟，一键生成行业专利分析报告。
梳状结构热门专利
QQ群二维码
意见反馈
意见反馈