US 7,068,325 B2Granted

Video signal processor and video signal processing method

AssigneeSony Corporation

InventorsYukinori Gengintani, Hisafumi Motoe

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Abstract

The present invention relates to a video signal processing device for avoiding a phenomenon that noise is upwardly or downwardly shifted due to noise reducing operation when a non-standard signal is input. When a non-standard signal is input as an input video signal, coefficients of interpolating filters for carrying out interpolation on pixels of timely-sequential field video signals are fixed as a non-standard signal supporting signal processing. With this processing, interpolated pixels achieved by the interpolation processing are located at the same vertical spatial position, and pixels which are noise-reduced by the interpolated pixels are located at the same vertical spatial position as pixels before original noise is reduced, thereby locating the pixels at the same horizontal position.

Claims8

Dependent claims

A video signal processing device, characterized by comprising:

interpolating means for executing interpolation processing adapted for a standard signal, the interpolation processing being executed so that when an input video signal of a video unit is a standard signal, the spatial positions of pixels in the vertical direction are made coincident between the input video signal and an input video signal that is preceding to the former input video signal by one picture unit;
differential means for achieving a differential signal for the input video signal interpolatively processed by said interpolating means and the one-picture-unit preceding input video signal which is interpolatively processed by said interpolating means;
noise component signal extracting means for extracting a noise component signal from the differential signal achieved by said differential means;
synthesizing means for synthesizing a noise component signal for the input video signal;
and
judging means for judging whether the input video signal is a standard signal or non-standard signal, wherein when it is judged by said judging means that the input video signal is a standard signal, said interpolating means executes the interpolation processing adapted for the standard signal, and when it is judged by said judging means that the input video signal is a non-standard signal, said interpolating means or said noise component signal extracting means executes required processing adapted for the non-standard signal concerned.

3 more elements

A video signal processing method, characterized by comprising:

an interpolating step for executing interpolation processing adapted from a standard signal, the interpolation processing being executed so that the spatial positions of pixels in the vertical direction are made coincident between an input video signal of a picture unit and a preceding input video signal which is preceding to the former input video signal by one picture unit when the input video signal is a standard signal;
a differential step for achieving a differential signal for the input video signal interpolatively processed in said interpolating step and the one-picture-unit preceding input video signal which is interpolatively processed in said interpolating step;
a noise component signal extracting step for extracting a noise component signal from the differential signal achieved in said differential step;
a synthesizing step for synthesizing a noise component signal for the input video signal;
and
a judging step for judging whether the input video signal is a standard signal or non-standard signal, wherein when it is judged in said judging step that the input video signal is a standard signal, said interpolating step executes the interpolation processing adapted for the standard signal, and when it is judged that the input video signal is a non-standard signal, said interpolating step or said noise component signal extracting step executes required processing adapted for the non-standard signal concerned.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/416,673Filed 10 Sep 2002
Priority: JP 2001-28023014 Sep 2001
Published: US 2004/0027489 A112 Feb 2004
Granted: 27 Jun 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H04N 5/945
Signal drop-out compensation: for signals recorded by pulse code modulation
H04N 5/21
Picture signal circuitry for video frequency region: circuitry for suppressing or minimising disturbance, e.g. moiré or halo
H04N 7/0135
Conversion of standards , e.g. involving analogue television standards or digital television standards processed at pixel level: involving…
H04N 5/46
Receiver circuitry for the reception of television signals according to analogue transmission standards: for receiving on more than one standard…