| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 121 | Keying signal generating circuit | JP15088985 | 1985-07-09 | JPS6211392A | 1987-01-20 | OSADA MASARU; MIYOSHI TADAYOSHI; YOKOGAWA SUMIO; NISHIYAMA HIROSHI; NEGISHI ICHIRO |
| PURPOSE: To eliminate necessity for the operation of a resistor for slice-level adjustment in accordance with the background color and the operation of a switch to change the background color and to improve the operability of the titled circuit by automatically generating a keying signal for a chroma key circuit. CONSTITUTION: The peak values of the color difference signals R-Y and B-Y from a TV camera coming from input terminals 1 and 2, are supplied to peak value detecting circuits 13 and 14, and the peak values at the positions where the detection phases are set are detected by means of the pulse of one field period from a detection phase setting circuit 15. The peak value detection signals from the circuits 13 and 14 are attenuated with a constant ratio by level attenuators 16 and 17 to align the variance of the signals due to shading, and then the signals are held by S/H circuits 18 and 19. The peak values of required fields from the circuits 18 and 19 and the inputted signals R-Y and B-Y are processed by differential amplifiers 20 and 21. The outputs from the amplifiers 20 and 21 are supplied to logical converters 22 and 23, and the logical keying signals that vary with the duration of color difference signals related to the background and with that of an object are outputted from an adder 11. COPYRIGHT: (C)1987,JPO&Japio | ||||||
| 122 | Television signal processing method | JP19833786 | 1986-08-25 | JPS6354086A | 1988-03-08 | ABE YOSHIO; YASUMOTO YOSHIO; KAGEYAMA TEIJI; INOUE HIDEO; TAKAI HITOSHI; AONO KOJI |
| PURPOSE: To superimpose much digital signals in the band of an existing TV system by superimposing a multiplex signal modulated by a digital signal to a chrominance subcarrier in a band symmetrical about a residual side band or both bands. CONSTITUTION: A carrier wave P 1 obtained from a 1st oscillator 4 is modulated in terms of amplititude by an amplitude modulator 2 by using a video base band signal inputted from a terminal 1. The obtained modulation wave is subjected to band limit by a 1st filter 3 and a residual-side wave is formed and fed to an adder 9. On the other hand, the digital signal inputted from a terminal 6 forms a multiplex signal by applying 4-phase shift keying modulation to a subcarrier P 3 obtained from a 2nd oscillator 11 by a 4-phase modulator 12. The multiplex signal applies double-side band amplitude modulation to the carrier P 2 obtained by subjecting 90° phase shift 5 to the carrier wave P 1 at the modulator 7. The modulated signal is subjected to band limit in a 2nd filter 8 and fed by an adder 9. The video base band signal is superimposed on the multiplex signal at the adder 9 to form a synthesized TV signal. COPYRIGHT: (C)1988,JPO&Japio | ||||||
| 123 | Video composing device | JP14497180 | 1980-10-15 | JPS5767389A | 1982-04-23 | WATANABE TOSHIROU; SUZUKI AKIRA; SUZUKI YASUO |
| PURPOSE:To compose a picture changing variously according to the status of an input color video signal by extracting the bright component of the input color video signal, discriminating the component in a signal level and generating a video keying signal from the result of the discrimination. CONSTITUTION:Signals A, B applied to video input terminals 1, 2 are digitized through A/D converters 4, 5 respectively and sent to a multiplexer 9. In case of the signal A, its chrominance component is removed from the signal A through a low pass filter 6 and only the lower 6 bits are sent to a comparator 7 while ignoring the upper 2 bits. In case of a control voltage signal from a variable resistor 11, 6 bits of the signal are quantized by an A/D converter 8 and sent to the comparator 7 to compare the quantized signal with the signal passed through the filter 6. The output of the multiplexer 9 is selected according to a signal outputted from the comparator 7 and the color video signals A and B are mixed. The mixed signal is returned to the original analog signal by a D/A converter 10 to output it. | ||||||
| 124 | Method and apparatus for encoding graphical cues on a compact disc synchronized with the lyrics of a song to be played back | US271184 | 1994-07-07 | US5649234A | 1997-07-15 | Walt Klappert; Max Garbutt; Michael Lehman |
| A method and apparatus for simplifying the steps needed to produce a graphical cue to words being displayed as they are to be sung by a performer such as in Karaoke. The production of a CD-Graphics (CD-G) product containing compact disc ("CD") audio accompanied with a visual presentation of the lyrics is facilitated. In the end CD-G product, the lyrics are displayed on a CRT as white letters against a chroma keyed background (usually blue). An operator is able to precisely control the appearance of the lyrics of the display and the filling of the displayed lyrics in time with the music. The color of the fill can be specified e.g., to distinguish male solo or female solo or combination. The operator may also create display titles and other stylized graphical images for display during interludes where there is music and no lyrics. The operator may also specify the way in which graphical elements are put on the screen e.g., painted from left to right, right to left, spiral out from the center, etc. | ||||||
| 125 | Apparatus for processing modified NTSC television signals, with digital signals buried therewithin | US108311 | 1993-08-20 | US5461426A | 1995-10-24 | Allen L. Limberg; Chandrakant B. Patel; Tianmin Liu |
| A relatively low power phase-shift-keyed (PSK) subcarrier encoding digital information is admixed with composite video signal. The PSK subcarrier is at an odd multiple of half the scan line frequency of the composite video signal, and the symbol rate is at a multiple of the scan line frequency. The PSK subcarrier modulates the amplitude of a suppressed carrier which is the same frequency as the video carrier for the composite video signal and preferably is in quadrature phasing therewith. To reduce evidence of the PSK subcarrier in television picture generated from that composite video signal, the PSK subcarrier is interrupted after each of periods of one frame duration and repeated in anti-phase during the next period of one frame duration. This also provides a basis for separating the PSK subcarrier from static luminance signal components by bandpass frame-comb filtering. Preferably, in the scan lines of consecutive pairs of scan lines, the PSK subcarrier is repeated with phase reversal of the subcarrier between scan lines, and the chroma subcarrier is repeated. This provides a basis for separating PSK subcarrier from chroma subcarrier by lowpass line-comb filtering. | ||||||
| 126 | Automatic gain control circuit | JP15893684 | 1984-07-31 | JPS6139780A | 1986-02-25 | IKEMOTO NAOMICHI |
| PURPOSE: To perform starting value type gain control operation and keyed type gain control operation in combination through one comparing circuit by amplifying a luminance signal on the basis of the head of synchronism through a couple of differential amplifiers whose emitters are connected mutually through a resistance, and using the differential amplifiers which differ in gain distinctively between a burst gate period and other periods. CONSTITUTION: A differential amplifier circuit 13 is connected between a luminance and chromaticity separating circuit 4 and a comparing circuit 13. The collector output of the transistor (TR) Q 2 of the differential amplifier circuit 13 is applied to the inverted input terminal of the single comparing circuit 12 in the burst gate period, and the collector output of TRQ 3 is applied in other periods. In this case, let R 3=R 4 and R 5=R 6, and further R 1<R 2, and the gain of Q 2 is larger than that of Q 3. If a synchronizing signal deforms or if a video signal exceeding a prescribed input value is inputted, the voltage of a video signal part rises above the synchronizing input voltage Va of the comparing circuit 12 except during the burst gate pulse period and a starting value type gain control circuit lowers the gain of an amplifier circuit 2. Here, the prescribed level is determined on the basis of the gain difference between Q 2 and Q 3 so that the starting value type gain control circuit operates. COPYRIGHT: (C)1986,JPO&Japio | ||||||
| 127 | Notice point position coordinate detecting system | JP5531888 | 1988-03-09 | JPH01228387A | 1989-09-12 | SATO HITOSHI |
| PURPOSE: To simplify pointing operation by constituting the title system so that when a notice point is indicated directly with a rod, etc., in which a pointer of a specific color has been attached to the tip in a television conference system, etc., coordinate data of this position is detected and sent to the receiving side. CONSTITUTION: When a state that a notice point of data 1 has been indicated by using a rod 30 in which a blue ball has been attached to the tip is brought to image pickup by a camera 2, data which has scanned an image which has been brought to image pickup is inputted successively to a color coincidence detector 7-1 using a chroma keyer, etc., for obtaining an output which has omitted a blue part of a specific color, and an address counter 9 of a coordinate data generating part 8. In the color coincidence detector 7-1, when the scanned data becomes blue, a color coincidence signal is sent to a pointer graphic detector 7-2 which has stored a circular graphic. Subsequently, in the pointer graphic detector 7-2, when the color coincidence signal coincides with the stored circular graphic, a signal of an H level is sent to an AND circuit 10. In such a way, by indicating directly the notice point with the rod 30 in which the blue ball has been attached to the tip, a pointer graphic can be generated at the same position of the data displayed on a display device 6 of the receiving side, therefore, the pointing operation is simplified. COPYRIGHT: (C)1989,JPO&Japio | ||||||
| 128 | Method and apparatus for coding segmented regions which may be transparent in video sequences for content-based scalability | US358594 | 1999-07-21 | US6141442A | 2000-10-31 | Tsuhan Chen |
| A method and apparatus for generating region frames from video frames are disclosed which employs an industry standard encoder to lessen the negative impact on the quality of the transmitted video sequence while consuming fewer bits. The invention utilizes image segmentation and color replacement techniques to create the region frames. Each region frame includes a subject region, zero or more previously segmented regions and zero or more non-subject regions. The subject region is defined by the pixels of the original video frame. The previously segmented regions and non-subject regions are assigned replacement pixels P.sub.n,y and C.sub.n, respectively. The replacement pixel C.sub.n is chosen to indicate a color that is not likely to be confused with any color in the subject region R.sub.n. The replacement pixels P.sub.n,y are chosen such that the compression ratio of the region frame data is maximized. Using the region frames, content based scalability can be provided without the need for special encoders and/or channels having a wider bandwidth. The decoder may comprise color or chroma keying apparatus or circuitry keying on the replacement color C.sub.n. Instead of keying on a single value, two thresholds may be assigned to define a boundary condition or a subject semi-transparent region. The decoder is forwarded data of the two thresholds and a flag is sent to indicate the dial boundary or semi-transparent region coding. A blending process blends the foreground and background of the semi-transparent object. | ||||||
| 129 | Method and apparatus for coding segmented regions which may be transparent in video sequences for content-based scalability | US801716 | 1997-02-14 | US5974172A | 1999-10-26 | Tsuhan Chen |
| A method and apparatus for generating region frames from video frames are disclosed which employs an industry standard encoder to lessen the negative impact on the quality of the transmitted video sequence while consuming fewer bits. The invention utilizes image segmentation and color replacement techniques to create the region frames. Each region frame includes a subject region, zero or more previously segmented regions and zero or more non-subject regions. The subject region is defined by the pixels of the original video frame. The previously segmented regions and non-subject regions are assigned replacement pixels P.sub.n,y and C.sub.n, respectively. The replacement pixel C.sub.n is chosen to indicate a color that is not likely to be confused with any color in the subject region R.sub.n. The replacement pixels P.sub.n,y are chosen such that the compression ratio of the region frame data is maximized. Using the region frames, content based scalability can be provided without the need for special encoders and/or channels having a wider bandwidth. The decoder may comprise color or chroma keying apparatus or circuitry keying on the replacement color C.sub.n. Instead of keying on a single value, two thresholds may be assigned to define a boundary condition or a subject semi-transparent region. The decoder is forwarded data of the two thresholds and a flag is sent to indicate the special boundary or semi-transparent region coding. A blending process blends the foreground and background of the semi-transparent object. | ||||||
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