Video signal system converting circuit for processing video signal having interlaced scanning lines to produce video signal having sequential scanning lines
First Claim
1. A video signal system converting circuit, comprising:
- a vertical interpolating circuit for interpolating picture elements between adjacent scanning lines of a current field of an interlaced scanning video signal by the use of a median filter, said median filter producing an interpolated picture element having a median value of color density of a first picture element in a line of said current field, a second picture element in a preceding line corresponding to said first picture element of said current field, and a third picture element in a scanning line of a preceding field positioned between said current and preceding lines; and
a vertical filter circuit for producing a weighted sum of said interpolated picture element and picture elements in said adjacent scanning lines, said vertical filter circuit outputting said weighted sum as a new picture element of a sequential scanning video signal.
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Abstract
A video signal recording and reproducing system enables recording and reproducing of a video signal with high quality. The system includes a recording system for recording the video signal on a record medium by a median filter and a reproducing system for reproducing the video signal from the record medium. The recording system separates a brightness signal and a color signal from an interlaced scanning signal. The recording system divides picture elements of each line into two phases by sorting the elements such that an element is put into one phase and the next element into the other. The recording system then carries out two-dimensional subsampling to the brightness signal and the color signal to reduce the amount of data. Then, the recording system compresses and time-division multiplexes the brightness signal and the color signal to provide a video signal to be recorded onto a record medium. The reproducing system separates the brightness signal and the color signal from a video signal read out from the record medium, and then interpolates picture elements into the two signals to obtain sequential scanning RGB signals for 525 scanning lines.
18 Citations
2 Claims
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1. A video signal system converting circuit, comprising:
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a vertical interpolating circuit for interpolating picture elements between adjacent scanning lines of a current field of an interlaced scanning video signal by the use of a median filter, said median filter producing an interpolated picture element having a median value of color density of a first picture element in a line of said current field, a second picture element in a preceding line corresponding to said first picture element of said current field, and a third picture element in a scanning line of a preceding field positioned between said current and preceding lines; and a vertical filter circuit for producing a weighted sum of said interpolated picture element and picture elements in said adjacent scanning lines, said vertical filter circuit outputting said weighted sum as a new picture element of a sequential scanning video signal. - View Dependent Claims (2)
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Specification
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- Resources
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Current AssigneePioneer Electronics (USA) Incorporated (Pioneer Corporation)
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Original AssigneePioneer Electronics (USA) Incorporated (Pioneer Corporation)
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InventorsAraya, Masahiro, Shioda, Takehiko, Iwamura, Hiroshi, Yamamoto, Yukinori
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Primary Examiner(s)Chin, Tommy P.
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Assistant Examiner(s)Truong, Khoi
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Application NumberUS08/173,887Time in Patent Office603 DaysField of Search358/310, 358/335, 358/330, 358/334, 348/441, 348/491, 348/448, 348/458, 348/459, 348/450US Class Current348/448CPC Class CodesH04N 7/012 Conversion between an inter...H04N 9/797 for recording the signal in...H04N 9/81 the individual colour pictu...
