Image storage using separately scanned wideband and narrowband variables

A system for storing and retrieving electric signals descriptive of color images, said system comprising:

• a video random-access memory having a multiplicity of storage locations, an input port and a serial-access output port;
• means for writing electric signals descriptive of color images into said video random-access memory via its input port for storage in storage locations thereof in accordance with separate bit-map organizations for wideband video information and for narrowband video information;
• means for selecting successive rows of storage locations storing wideband video information for reading out from said video random-access memory via its serial-access output port, one line of wideband video information per display line trace interval;
• means for selecting successive rows of storage locations storing narrowband video information for read out from said video random-access memory via its serial-access output port, during selected display line retrace intervals;
• means for resampling said narrowband video information to the same sampling density as said wideband video information;
• means for temporally aligning corresponding samples of wideband video information and narrowband video information of the same sampling density;
• and
• means for generating component color signals in response to said temporally aligned corresponding samples of wideband video information and narrowband video information.

A system for storing and retrieving electric signals descriptive of color images, said system comprising:

• a video random-access memory having a multiplicity of storage locations, an input port and a serial-access output port;
• means for writing electric signals descriptive of color images into said video random-access memory via its input port for storage in storage locations thereof in accordance with a relatively densely sampled bit-map organization for luminance information and a relatively sparsely sampled bit-map organization for chrominance information;
• means for selecting successive rows of storage locations storing luminance information in said densely sampled bit-map organization for reading out from said video random-access memory via its serial-access output port, one line of luminance information during each line trace interval of display;
• means for selecting successive rows of storage locations storing chrominance information in said sparsely sampled bit-map organization for reading out from said video random-access memory via its serial-access output port, during selected line retrace intervals of display;
• a first line storage memory, for storing samples of odd-numbered scan lines of first chrominance information, having an input port to which the serial-access output port of said video random-access memory is connected, and having an output port;
• a second line storage memory, for storing samples of even-numbered scan lines of first chrominance information, having an input port to which the serial-access output port of said video random-access memory is connected, and having an output port;
• a first two-dimensional spatial interpolator of pipe-line type, having two input ports and an output port;
• means operative during selected times for reading out from the output ports of said first and second line storage memories in parallel to the input ports of said first two-dimensional spatial interpolator, said selected times being such as to temporally align first chrominance information samples supplied from the output port of said first two-dimensional spatial interpolator with corresponding luminance information samples supplied from the serial-access output port of said video random-access memory during display line trace intervals;
• a third line storage memory, for storing samples of odd-numbered scan lines of second chrominance information, having an input port to which the serial-access output port of said video random-access memory is connected, and having an output port;
• a fourth line storage memory, for storing samples of even-numbered scan lines of second chrominance information, having an input port to which the serial-access output port of said video random-access memory is connected, and having an output port;
• a second two-dimensional spatial interpolator of pipe-line type, having two input ports and an output port;
• means operative during selected times for reading out from the output ports of said third and fourth line storage memories in parallel to the input ports of said second two-dimensional spatial interpolator said selected times being such as to temporally align second chrominance information samples supplied from the output port of said second two-dimensional spatial interpolator with corresponding luminance information samples supplied from the serial-access output port of said video random-access memory during display line trace intervals;
• and
• means for generating component color signals in response to said temporally aligned samples of luminance information, first chrominance information and second chrominance information.

A system for storing and retrieving electric signals descriptive of color images, said system comprising:

• a video random-access memory having a multiplicity of storage locations, having an input port and having a serial-access output port;
• means for writing electric signals descriptive of color images into said video random-access memory via its input port for storage in storage locations thereof in accordance with a relatively densely sampled bit-map organization for luminance information and a relatively sparsely sampled bit-map organization for chroma map read address information;
• means for selecting successive rows of storage locations storing luminance information in said densely sampled bit-map organization for reading out from said video random-access memory via its serial-access output port, one line of luminance information during each display line trace interval;
• means for selecting successive rows of storage locations storing chroma map read address information in said sparsely sampled bit-map organization for reading out from said video random-access memory via its serial-access output port, during selected display line retrace intervals;
• a first line storage memory for storing, during two line scan times, samples of odd-numbered scan lines of chroma map read address information, having an input port to which the serial-access output port of said video random-access memory is connected, and having an output port;
• a second line storage memory for storing, during two line scan times, samples of even-numbered scan lines of chroma map read address information, having an input port to which the serial-access output port of said video random-access memory is connected, and having an output port;
• means, operative during the reading out of said first and second line storage memories during display line trace intervals, for multiplexing alternatively from the output port of said first line storage memory and the output port of said second line storage memory to provide a stream of time-interleaved chroma map read address information samples;
• a first chroma map memory receptive of said stream of time-interleaved color map read address information samples for generating a stream of corresponding samples of first chrominance information;
• a first two-dimensional spatial interpolator of pipe-line type, having two input ports and an output port;
• means for temporally aligning samples of first chrominance information generated in response to samples of chroma map read address information from said first line storage memory and from said second line storage memory for application to respective ones of the input ports of said first two-dimensional spatial interpolator;
• a second chroma map memory receptive of said stream of time-interleaved color map read address information samples for generating a stream of corresponding samples of second chrominance information;
• a second two-dimensional spatial interpolator of pipe-line type, having two input ports and an output port;
• means for temporally aligning samples of second chrominance information generated in response to samples of chroma map read address information from said first line storage memory and from said second line storage memory for application to respective ones of the input ports of said second two-dimensional spatial interpolator;
• and
• means for generating component color signals during display line trace intervals, in response to samples of luminance information from the serial-access output of said video random-access memory, two-dimensionally spatially interpolated first chrominance information from the output port of said first two-dimensional spatial interpolator, and two-dimensionally spatially interpolated second chrominance information from the output port of said second two-dimensional spatial interpolator.

A method of utilizing a video random-access memory, having a read/write random-access port and a serial output port, for displaying images in raster-scan format from a frame or succession of frames of color video data including luminance values and chrominance values, said method comprising:

• describing the luminance values in digitized sampled-data format;
• writing into respective rows of said video random-access memory, via said read/write random access port, said digitized luminance values arranged such that respective sequences of luminance values corresponding to horizontal lines of raster scan display data may be accessed, at least a line at a time, at said serial output port;
• describing the chrominance values in digitized sampled-data format;
• writing into respective rows of said video random-access memory, exclusive of the rows in which digitized luminance values are written, said digitized chrominance values arranged so that said digitized chrominance values may be accessed at said serial output port in predetermined sequences corresponding to at least portions of respective horizontal lines of raster scan display data, and wherein said luminance and chrominance values are respectively organized in separate bit maps having respective starting addresses;
• reading luminance values corresponding to a complete horizontal line of raster scan display from rows of memory containing luminance values, and reading chrominance values corresponding to at least a portion of a horizontal line of raster scan display from rows of memory containing chrominance values, within a line interval of said raster scan display to produce sequences of luminance values corresponding to respective horizontal lines, interleaved with said predetermined sequences of chrominance values.