Hitachi, Ltd.

Hitachi Video Engineering, Incorporated

Mitsubishi Electric Corporation

Hitachi Ltd. & Hitachi Video Eng.

Masato Sugiyama

Kenji Katsumata

Shigeru Hirahata

Isao Nakagawa

Kazuo Ishikura

Takaaki Matono

Sunao Suzuki

Kazuhiro Kaizaki

Mitsuo Nakajima

Haruki Takata

Masahiko Achiha

Akihide Okuda

Toshinori Murata

Yasutaka Tsuru

Yasuhiro Hirano

Tohru Suzaki

Takashi Hasegawa

Ikuya Arai

Toshiyuki Kurita

Makoto Onozawa

Tadashi Kasezawa

Katsunobu Kimura

Noriyuki Yamaguchi

Masaharu Yao

Tsuguo Itagaki

Yuzo Nishinaka

Tatsuo Nagata

Koichi Sudo

Shoji Kimura

Junji Motoshima

Shobu Saito

Takuzi Kurashita

Takashi Kanehachi

The present invention provides a movement correction frame count transformation apparatus for carrying out frame count transformation processing on a picture signal. In the apparatus, an input picture signal (S ) of interlaced scanning is converted into a signal (S ) of sequential scanning by an IP conversion unit ( ). A movement detecting unit ( ) detects movement detection signals (MD and MD ). A block unit movement vector searching unit ( ) detects a block unit movement vector (BMV) by carrying out block matching processing. A movement vector correcting unit ( ) carries out miniblock division processing to generate a movement vector (BV) if a movement correction error is equal to or greater than a threshold value. A pixel unit movement vector generating unit ( ) generates a movement vector with a smallest error component between a frame signal of a current frame and a frame signal of an immediately preceding frame as a movement vector of a pixel. An MC interpolation frame signal generating unit ( ) generates an interpolation frame in movement correction processing carried out by a median filter in order to produce a signal (S ) of sequential scanning as a result of frame count transformation based on movement correction.

Method and device for converting number of frames of image signals

A low-cost motion-compensated picture signal scan conversion circuit ensuring high picture quality is to be provided. The circuit has a motion-adaptive first interpolation signal generator; a second motion-compensated interpolation signal generator; a motion vector detector; and a setting unit for checking the reliability of motion compensation by comparing signals from the second interpolation signal generator with signals on interlaced scanning lines, and setting the selection of signals from the first and second interpolation signal generators, wherein interlaced scanned signals are converted into progressive scanned signals by setting the threshold so that the threshold become smaller with an increase in the number of re-searched blocks in the detection of motion vectors.

Circuit for scan conversion of picture signal using motion compensation

A display apparatus for a television or computer terminal having a cathode ray tube with a deflection coil. The display apparatus includes a signal processing circuit which compresses a display period in a horizontal scanning period of an input video signal and which expands a blanking interval of the horizontal scanning period of the video signal, the signal processing circuit providing an output of the video signal to the cathode ray tube, and a horizontal retrace interval expansion circuit which expands a horizontal retrace line interval of a horizontal deflection current for the deflection coil of the cathode ray tube in accordance with the blanking period expanded by the signal processing circuit. The cathode ray tube displays the input video signal in accordance with the output of the signal processing circuit and the output of the horizontal retrace interval expansion circuit.

Display apparatus with circuit expanding horizontal retrace interval of horizontal deflection current

A noise reduction signal processing apparatus for reducing noises accurately, such as for use in a display apparatus for displaying a video signal, has a median filter (,) which receives the video signal, and which executes a filter processing on the inputted video signal and outputs a reference signal; a subtracter (,) which is connected with the median filter (,), and which outputs a difference signal that indicates a difference between a reference signal outputted from the median filter (,) and the video signal; a minimum value detection circuit (,) which outputs the difference signal from the subtracter (,) or a limitation value, whichever is smaller, as a minimum value signal; and an adder (,) which adds a noise reduction signal obtained on the basis of the minimum value signal output from the minimum value detection circuit (,) and the video signal.

Noise reduction signal processing circuit and display apparatus

In order to carry out format conversion or scaling processing of picture signal by a memory having a small capacity, picture signals of interlace scanning are converted into picture signals of progressive scanning by interpolation by using an IP convertor 1 and a multiple scan convertor 3, a scaling processing of expansion and compression in the horizontal direction is firstly performed by using a horizontal scaling unit 5, processing of expansion, compression, frame rate conversion, synchronization and the like are secondly performed by using a vertical scaling unit 6 and commonly using memories used in scaling processing in the vertical direction and finally, color space conversion or inverse gamma processing is performed by using a picture quality improving unit 8 thereby converting the picture signals into picture signals S6 having a predetermined format.

Method and circuit for signal processing of format conversion of picture

Disclosed is a wide picture plane/standard picture plane television signal receiving apparatus which comprises: a first signal processing circuit for doubling the scanning speed of an input standard television signal; an aspect ratio conversion circuit for converting a display aspect ratio of the double scanning speed television signal from the first signal processing circuit into a wide aspect ratio; a second signal processing circuit for processing an input EDTV television signal into a double scanning speed television signal with a wide aspect ratio; a first signal selection circuit for selecting one of the respective output signals from the aspect ratio conversion circuit and the second signal processing circuit; a wide aspect display device for displaying the selected output signal from the first signal selection circuit; an EDTV signal detection circuit for detecting the processing effected on the EDTV signal in the second signal processing circuit to thereby switch the contact of the first signal selection circuit to its second signal processing circuit side from its first signal processing circuit side.

Apparatus for receiving wide/standard picture plane television signal

In a motion-adaptive television signal processor, a field as a reference for a moving picture signal includes a signal delayed by a frame memory or a field memory. A non-standard signal is beforehand processed so as to separate Y and C signals, and the signal thus processed is input to a motion-adaptive processor to thereby reduce a deviation in center of gravity between a still picture signal and a moving picture signal on the timebase to thereby suppress unnatural motion of the picture.

Image signal correction circuit and image signal processor using the

A television for receiving two or more types of television signals capable of displaying an image irrespective of the types of a received television signal and a display for displaying an image, by controlling, in accordance with the receiving television signal and the display, a processor and aspect ratio converter for demodulating the received television signal.

Processing circuit for a plurality of different TV signals

A video signal processing circuit capable of enlarging and displaying a picture and adapted for use in an apparatus in which a desired picture is selected, and a video signal representative of the desired picture under interlaced scanning is received, stored in a memory and processed to provide an enlarged video signal, includes a real signal/interpolated signal preparation circuit for preparing, from the stored video signal, new scanning lines for an image to be enlarged, and a memory processing circuit having switching control function to store an output signal of the real signal/interpolated signal preparation circuit in a memory, read the video signal out of the memory at a period different from a period at which the output signal is stored in the memory, and delay a read-out signal by one or more fields so that an enlarged signal is delivered.

Video signal processing circuit capable of enlarging and displaying a

A video signal processing circuit capable of enlarging and displaying a picture and adapted for use in an apparatus in which a desired picture is selected, and a video signal representative of the desired picture under interlaced scanning is received, stored in a memory and processed to provide an enlarged video signal, comprises includes a real signal/interpolated signal preparation circuit for preparing, from the stored video signal, new scanning lines for an image to be enlarged, and a memory processing circuit having switching control function to store an output signal of the real signal/interpolated signal preparation circuit in a memory, read the video signal out of the memory at a period different from a period at which the output signal is stored in the memory, and delay a read-out signal by one or more fields so that an enlarged signal is delivered.

A motion information signal generating circuit comprises a motion detecting circuit for detecting a piece of motion information from a digitized television signal; a temporal-spatial signal processing circuit for expanding a signal representing the so detected motion information both in time and space and a noise eliminator circuit connected between the motion detecting circuit and the temporal-spatial signal processing circuit. The noise eliminator circuit has at least one 1H memory to detect the correlation between the motion information signals pertaining to two adjacent picture elements which are one horizontal sweep line part, and for instance, the motion information signal of a smaller data quantity is selected, thereby preventing appearance of a false motion signal which would be caused by a noise of increased amplitude.

Motion signal generating circuit for use in a television receiver

A video signal processing circuit capable of reproducing a still picture signal from a color video signal comprises a luminance signal/chrominance signal separation circuit of a motion adaptive type, a scanning line interpolation circuit of a motion adaptive type connected with the separation circuit, a first memory connected with the separation circuit to store therein the output of the separation circuit, a second memory connected with the interpolation circuit to store therein the output of the interpolation circuit and a switching circuit for delivering therethrough the outputs of said first and second memories as a first output signal alternately and for delivering therethrough the outputs of said second and first memories as a second output signal alternately, the alternation for the delivery by the switching circuit being effected at a frequency identical with the field frequency of the video signal.

Sequential scanning converter with frame comb filter and freeze frame

A movement detector necessary for processing composite color television signals, which detects movement in image signals, wherein the detecting circuit is so constructed that no deficient motion is produced. A difference signal between the present frame and that preceding by two frames of the television signals is converted into a motion information signal and a movement detection signal is made by integrating the signal obtained by the conversion with respect to temporal axis.

Movement detector for composite color television signals

A movement detection circuit for detecting movement information of a luminance signal and movement information of a chrominance signal of a television signal comprises a first movement detection circuit for detecting the movement information of the luminance signal and a second movement detection circuit for detecting the movement information of the chrominance signal. The first movement detection circuit detects the movement information of the luminance signal based on two signals spaced by one frame period, and the second movement detection circuit detects the movement information of the chrominance signal based on two signals spaced by two frames periods.

Movement detection circuit of a video signal used in a television

A motion detector for a chrominance signal which is used with a TV receiver equipped with a video signal motion detector. This motion detector for a chrominance signal has a delay element for delaying the chrominance signal of a video signal by 1 frame period, a subtracter for subtracting the output signal of the delay element from the input signal thereof, an absolute value conversion circuit to which the output signal from the subtracter is inputted, and a smoother circuit to which the output signal from the absolute value conversion circuit is supplied. If the chrominance signal of video signals on two consecutive frames are the same, the output signal of the subtracter becomes zero. If the chrominance signals of video signals on two consecutive frames are different, the output signal of the subtracter takes a positive or negative value. The negative value signal is converted into a positive value signal by the absolute value conversion circuit. A signal is outputted from the smoother circuit only when the chrominance signals of video signals on two consecutive frames are different. This outputted signal is a chrominance signal motion detection signal. The luminance signal contained in a video signal is removed from the video signal using a comb-type filter.

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Yokohama, Japan

Masato Sugiyama