The present invention provides a system and method for representing quasi-periodic (“qp”) waveforms comprising, representing a plurality of limited decompositions of the qp waveform, wherein each decomposition includes a first and second amplitude value and at least one time value. In some embodiments, each of the decompositions is phase adjusted such that the arithmetic sum of the plurality of limited decompositions reconstructs the qp waveform. These decompositions are stored into a data structure having a plurality of attributes. Optionally, these attributes are used to reconstruct the qp waveform, or patterns or features of the qp wave can be determined by using various pattern-recognition techniques. Some embodiments provide a system that uses software, embedded hardware or firmware to carry out the above-described method. Some embodiments use a computer-readable medium to store the data structure and/or instructions to execute the method.

System and method for signal decomposition, analysis and reconstruction

Apparatus for signal decomposition, analysis and reconstruction

The color television receiver includes a square-wave clock generator used as a chrominance subcarrier oscillator generating at least four clock signals, the first of which has a frequency four times the chrominance subcarrier frequency, and the second to fourth of which have a frequency equal to the chrominance subcarrier frequency, the first and second clock signals having a mark/space ratio of 1:1; a stage providing a digital chrominance signal, a first digital circuit having as one input signal the digital chrominance signal, and as another input signal the digital chroma control signal to provide a digital amplitude control of the received chrominance subcarrier wave; and a second digital circuit to provide digital PAL identification and color killer action and, if necessary, digital noise-dependent color killer action.

Color-television receiver with at least one digital integrated circuit for processing the composite color signal

A luminance-chrominance signal separation circuit in which only those values of a digitized video signal which do not manifest drop-out are used for producing a luminance and a chrominance signal from linear combinations of the video signals. Different combinations are used depending on the locations of the drop-out.

Drop-out correcting luminance-chrominance signal separation circuit

Signal decomposition, analysis and reconstruction apparatus and method

A system for processing discrete digitized samples representing composite signals utilizing a filter which eliminates a periodic signal component from the composite signal. The filter receives and stores consecutive digital sample representations of the composite signal and, for each received sample representation, provides a digital average representation of the values of a selected number of the received digital sample representations which define a zero average value of the periodic signal component. In one embodiment of the signal processing system, the filter is arranged in circuit with digital delays and digital signal combining and differencing circuits to form a digital color television signal dropout compensator, which is adaptable for use in NTSC, PAL, PAL-M, or other television standard systems. In a dropout compensator adapted for NTSC color television signals, the filter receives the digital composite television signal and eliminates the chrominance component therefrom, leaving only the luminance component at its output. A following digital subtractor is coupled to subtract the luminance component provided by the filter from the received digital composite television signal and provide the chrominance component at its output. The separated chrominance component is phase adjusted on consecutive television lines and recombined with the separated luminance component provided by the filter for substitution in the television signal in place of the dropout affected portion thereof. The dropout compensator also includes a digital delay of one horizontal line period through which the television signal components are passed to provide the delay necessary for substituting television signal information from a prior horizontal line.

Filter and system incorporating the filter for processing discrete samples of composite signals

A method and apparatus for dropout compensation of composite color television signals is described in which both the luminance and chrominance components forming a dropout compensation signal are derived from the same portion of the original color television information signal without dropouts immediately preceding the dropout. One horizontal line of the color television signal without dropouts is continuously stored in a memory. When a dropout occurs, the stored television signal line is circulated in the memory. The length of delay of the chrominance component of the stored television signal is controlled from line to line in response to the phase of the color burst synchronizing component of the color television signal being compensated for dropouts. The length of delay of the luminance component of the stored television signal is controlled on consecutive lines in response to the horizontal line synchronizing component of the color television signal being compensated for dropouts. The respectively delayed chrominance and luminance components are combined to form a composite dropout compensation signal which is inserted in the original color television signal in place of a detected dropout.

Bantval Y. Kamath

Papers

Filter and system incorporating the filter for processing discrete samples of composite signals

Method and apparatus for one line dropout compensation of color television signals