Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7336731 | Demodulator with phase-adjusting function A demodulator with a phase-adjusting function including a detector including a delay detector delaying an input signal in delaying stages using a first clock obtained by frequency-dividing a sampling-clock at a first-ratio to output a delayed modulated signal, the s... | 02/26/2008 |
| 6992958 | Phase-locked loop circuit for reproducing a channel clock In PLL circuits for reproducing a channel clock in synchronism with data read from a disk-shaped recording medium driven for rotation, the frequency dividing ratio of frequency dividers provided in desired signal paths is made changeable according to the reproduced ... | 01/31/2006 |
| 6690877 | Magnetic tape recording apparatus In a magnetic tape recording apparatus for recording an FM luminance signal and a low frequency converted chrominance onto tracks of a magnetic tape, both of a frequency of the FM luminance signal and a spectrum distribution of the low frequency converted... | 02/10/2004 |
| 6160949 | Video signal reproduction apparatus for chrominance signals A video signal reproduction apparatus reproduces a chrominance signal which has been converted to a low frequency band and recorded on a magnetic tape. The low frequency chrominance signal read out from the magnetic tape is first subjected to phase recove... | 12/12/2000 |
| 5845040 | Video signal reproduction apparatus for chrominance signals A video signal reproduction apparatus reproduces a chrominance signal which has been converted to a low frequency band and recorded on a magnetic tape. The low frequency chrominance signal read out from the magnetic tape is first subjected to phase recove... | 12/01/1998 |
| 5223941 | Helical scan type playback apparatus for video data recorded on magnetic tape A helical scan type playback apparatus comprising a plurality of magnetic heads, a position signal generation element for generating a signal indicative of each position of these magnetic heads, and a switching element for video signals played back by the... | 06/29/1993 |
| 5210619 | Chroma phase modulator An A/D converter converts a composite video signal to a digital signal. A bandpass filter extracts a chroma signal-A sinX from the composite video signal in digital form. A delay circuit delays the chroma signal-A sinX by 1/4 fsc to output-A cosX. Delay c... | 05/11/1993 |
| 5130811 | Color video signal recording apparatus for suppressing best interference A recording circuit includes a frequency modulator for frequency-modulating an input signal, such as, a luminance signal of a color video signal, a phase inverter for phase-inverting a signal with a predetermined frequency which is included in an output s... | 07/14/1992 |
| 4984093 | Video recorder with increased bandwidth recording A luminance signal is frequency modulated with an FM carrier to generate a frequency modulated YFM signal having a frequency spectrum within a frequency band of e.g. 1.6 to 8 megahertz. A quadrature modulated PAL color signal is down-converted in a mixer ... | 01/08/1991 |
| 4901159 | Magnetic recording apparatus for recording video and two kinds of audio signals A recording and reproducing apparatus includes three groups of magnetic heads. A sound signal is converted into a corresponding frequency-modulated signal and is also converted into a corresponding digital signal. The frequency-modulated sound signal is r... | 02/13/1990 |
| 4884151 | Recording and/or reproducing apparatus with photo-electric image device A video recording and reproducing apparatus with photoelectric image camera in which a color signal processing circuit of a recording system is simplified. For recording, a luminance signal and a chrominance signal are produced in accordance with an image... | 11/28/1989 |
| 4750051 | Color difference line sequential circuit in a magnetic recording system A color difference line sequential circuit for use in a magnetic recording apparatus such as an electronic still camera or the like in which an image signal is frequency modulated and is then recorded in a magnetic recording medium. The color difference l... | 06/07/1988 |
| 4698694 | Video signal processing apparatus for video tape recorders A video signal processing apparatus used for a video tape recorder performs chrominance signal processing which is digitalized. The chrominance signal is up-converted and phase-shifted in a recording block, and, in a reproducing block, phase-shifted in th... | 10/06/1987 |
| 4695899 | Recording and reproducing system employing balanced modulation for color video signal A color video signal recording system comprises means for producing a quadrature two-phase balanced-modulated color signal by subjecting a subcarrier to quadrature two-phase balanced modulation by two color signals, means for producing a demodulation-purp... | 09/22/1987 |
| 4573086 | Color television signal converting circuit In a video disc player system, the NTSC color TV signal is recorded on the video disc, of which carrier chroma signal has been lowered to e.g., 1.52 MHz, due to limitations on the available frequency band within this system. To reproduce this recorded TV ... | 02/25/1986 |
| 4555735 | Interconnection system between image pickup device and recording device A system for interconnecting with a single coaxial cable between an image pickup device such as a color television camera and a recording device such as a video tape recorder is provided. The camera signal is separated into the luminance signal which in t... | 11/26/1985 |
| 4554596 | Color video signal recording apparatus Disclosed is a color video signal recording apparatus wherein the chrominance signal and the luminance signal are separated from the composite color video signal, the luminance signal is transformed into a frequency modulation signal and the chrominance s... | 11/19/1985 |
| 4550345 | Magnetic video pilot signal recording/reproducing system In a video tape recorder of the rotary two-head helically scanning type, a magnetic recording/reproducing system provided with a mode judging device in which a video signal is recorded onto a recording track in a multiplex manner together with a pilot sig... | 10/29/1985 |
| 4491876 | Video recording by frequency modulation of luminance and multiplexed chroma components In a video recording system the chroma components of a color television signal are applied to a multiplexer where they are interleaved in frequency with each other so that the energy concentration of each chroma component occurs at frequencies interleaved... | 01/01/1985 |
| 4208673 | Color recorder for reducing crosstalk A method of and apparatus for recording a video signal in successive parallel tracks on a record medium, and for reproducing the recorded signal. The video signal, which may be the luminance component of a composite color television signal, frequency modu... | 06/17/1980 |
| 4141033 | Device for automatically controlling the asymmetry of a signal When a color television signal is recorded on a video disc and said signal is read a complication arises owing to the asymmetry which is produced in the signal by the various process steps. This gives rise to spurious components whose influence should be ... | 02/20/1979 |
| 4123774 | Color signal encoding methods and apparatus for video recording and playback Methods and apparatus for translating standard broadcast format color television signals to an encoding format for use in a transfer channel, and for retranslation of the signals to broadcast format. In one form of the invention, the broadcast format chro... | 10/31/1978 |
| 4117509 | Color television system for recording line sequential signals with 90° phase shift A system for recording a color television signal. The color information is recorded as an amplitude modulation. This color information consists of a first and a second color-difference signal, which two color-difference signals are transmitted in a line-s... | 09/26/1978 |
| 3982272 | Color television system in which the chrominance subcarrier is locked to the frequency-modulated luminance signal A color television system for transmitting a color television signal, specifically for recording on and subsequently reproducing from a record carrier. The color television signal to be transmitted contains a first carrier which is frequency-modulated wit... | 09/21/1976 |
| 3968514 | Magnetic recording and/or reproducing apparatus In recording PAL television signals, the chrominance signal components of field intervals are recorded in successive parallel tracks on a record medium. The ends of the margins between the line intervals of each field are recorded in each of the tracks an... | 07/06/1976 |
