US 4,376,290 A · Color video information processing apparatus

Abstract

In apparatus for processing color video information composed of a color video signal having luminance and chrominance components and a respective identifying signal which identifies a phase of the chrominance component, for example, by indicating the frame, field and/or line of which the respective color video signal is a part; the color video signal and respective identifying signal are temporarily stored in a memory and, when the color video signal and the respective identifying signal are simultaneously read out of the memory, a comparison is made between the read-out identifying signal and a corresponding reference or read request signal, and at least the phase of the chrominance component of the read-out color video signal is controlled on the basis of such comparison. In the case where a line of the read-out color video signal is indicated by its respective identifying signal to be of a field which is different from the read request field defined by the then occurring reference or read request signal so that it would be spatially displaced from the corresponding line of the read request field, the value of at least the luminance component in the read-out line is replaced by an interpolated value derived from values of the luminance component in the lines adjacent the read-out line. When a PAL color video signal is being processed, absolute values of color difference signals are derived, for certain sampling points where such color difference signals do not appear, by interpolation of the values for such color difference signals from adjacent sampling points.

Claims22

Dependent claims

An apparatus for processing color video information composed of a color video signal having luminance and chrominance components and a respective identifying signal which identifies a phase of said chrominance component, said color video information being in the form of a digital signal divided into a succession of blocks each containing data of said color video signal and said respective identifying signal which identifies at least one of the frame, field and line of said data of the color video signal contained in the respective block, said apparatus comprising:

memory means for temporarily storing said color video signal and said respective identifying signal,
means for simultaneously reading out said color video signal and the respective identifying signal from said memory means,
means for effecting a comparison of said identifying signal, as read out of said memory means, with a reference signal,
means responsive to said comparison for controlling the phase of said chrominance component of the color video signal read out from said memory means,
line interpolating means also responsive to said comparison for providing an interpolated value of at least said luminance component of a data block being read out of said memory means when said identifying signal being simultaneously read out identifies a field different from a field identified by said reference signal, said interpolated value being based on the value of the luminance component in the line of said data block being read out of said memory means and on the value of the luminance component in an adjacent line stored in said memory means, and
interpolator control means for said interpolating means causing said adjacent line to be the line which precedes the line of the data block being read out when said different fields identified by said identifying signal and said reference signal, respectively, are of the same frame and causing said adjacent line to be the line which follows the line of the data block being read out when said different fields are from different frames, respectively.

3 more elements

A method for processing color video information composed of a color video signal having luminance and chrominance components and a respective identifying signal which identifies a phase of said chrominance component, said color video information being in the form of a digital signal divided into a succession of blocks each containing data of said color video signal and said respective identifying signal which identifies at least one of the frame, field and line of said data of the color video signal contained in the respective block, said method comprising:

writing said color video signal and said respective identifying signal in a memory,
simultaneously reading out said color video signal and the respective identifying signal from the memory,
comparing said identifying signal, as read out of the memory, with a reference signal,
controlling the phase of said chrominance component of the color video signal read out from the memory in accordance with the comparison of the identifying and reference signals,
interpolating a value of at least said luminance component of a data block being read out of said memory when said identifying signal being simultaneously read out of said memory identifies a field different from a field identified by said reference signal, said interpolated value being based on the value of the luminance component in the one of said data block being read out of the memory and on the value of the luminous component in an adjacent line stored in said memory, and controlling the interpolating so that said adjacent line is the line which precedes the line of the data block being read out when the different fields identified by said identifying and reference signals, respectively, are of the same frame, and said adjacent line is the line which follows the line of the data block being read out when said different fields are from different frames, respectively.

2 more elements

Dependencies are inferred from the claim text.

Color video information processing apparatus

Life of this patent

Color video information processing apparatus

Life of this patent

Abstract

Claims22