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| Number | Title | Issue Date |
| 7359528 | Monitoring of video or audio based on in-band and out-of-band data The presently claimed invention relates generally to monitoring and/or filtering video or audio data. In one implementation a method is provided including: obtaining data representing video or audio; analyzing the data representing video or audio for an in-band sign... | 04/15/2008 |
| 7333153 | Expanded information capacity for existing communication transmission systems A system for transmitting digital programming includes a program source providing digital information, circuitry for modulating the digital information onto a visual carrier modulated with analog television programming, and a visual transmitter coupled to the modula... | 02/19/2008 |
| 7181022 | Audio watermarking to convey auxiliary information, and media embodying same Methods of processing audio to convey auxiliary information therein without audible evidence of data alteration. Various arrangements are disclosed. One receives plural bit auxiliary data in which the auxiliary information is included, and modulates a carrier signal... | 02/20/2007 |
| 7145963 | Method and apparatus for multiple phase splitting for dual band IQ subharmonic mixer drive chains A method and apparatus are provided for generating first and second modulation signals from a local oscillator signal for quadrature subharmonic modulation of a quadrature amplitude modulated information signal. The method includes the steps of delaying the local os... | 12/05/2006 |
| 7057666 | System and method for encoding information into a video signal A system (10) and method of the present invention encodes information into a video signal by substituting luminance information within the video signal with a modulated frame of content data on one or more lines of the active portion of the video signal to pr... | 06/06/2006 |
| 7050603 | Watermark encoded video, and related methods Watermarks in video signals or the accompanying audio track are used to associate video objects in a video sequence with object specific actions or information. A video object refers to a spatial and temporal portion of a video signal that depicts a recognizable obj... | 05/23/2006 |
| 7036083 | Multimode interactive television chat A user interface device has a graphical user interface that can simultaneously display a combination of television and Internet content in various display modes. The display modes may have different proportions, positioning or other features of the Internet and tele... | 04/25/2006 |
| 7006555 | Spectral audio encoding Blocks of audio are encoded based upon corresponding first and second frequencies. The first and second frequencies are hopped from block to block. An audio quality measure (AQM) is computed for each block of audio such that, if x out of y blocks of audio have an AQ... | 02/28/2006 |
| 6977691 | System for nonlinear viewing of television show segments A system for nonlinear viewing of television show segments is provided by transmitting a main signal and an ancillary signal. The ancillary signal is a short show segment. The television receiver system can select either the main signal or the ancillary signal. The ... | 12/20/2005 |
| 6968564 | Multi-band spectral audio encoding An encoder includes a sampler that samples an audio signal and that generates from the samples a plurality of short blocks of sampled audio. Each of the short blocks has a duration less than a minimum audibly perceivable signal delay. A processor combines the plural... | 11/22/2005 |
| 6947060 | Image forming apparatus, electron beam apparatus, modulation circuit, and image-forming apparatus driving method An image forming apparatus which performs pulsewidth modulation with a pulsewidth set by counting a clock. Especially, for grayscale level correction by setting the frequency of the clock, the periodic clock is counted, and an output pattern is changed in accordance... | 09/20/2005 |
| 6903371 | Thin film transistor and display using the same An amorphous silicon film is laser irradiated a plural number of times to make the film composed of a plurality of crystal grains while suppressing the formation of protrusions at the boundaries of the adjoining grains to realize a polycrystalline silicon thin film ... | 06/07/2005 |
| 6519008 | Filter circuit For an optimal adjustment of the filter frequency of a signal filter, independently of external influences, process spreads and temperature fluctuations, a filter circuit for filtering at least one sound carrier in a composite video signal by at least one... | 02/11/2003 |
| 6256070 | Concurrent discrete time oscillators (DTO) for video and closed caption encoding A video encoding system combines the processing of image data and closed caption data in the formation of a raster television signal. By combining the processing of image data and closed caption data, a single discrete time oscillator (DTO) can be used to... | 07/03/2001 |
| 5831679 | Network for retrieval and video transmission of information Signal processors for permitting the transparent, simultaneous transmission and reception of a volume of information in the video bandwidth is disclosed. The volume of data is selected in response to receiving a signal at a transmitter site. The signal pr... | 11/03/1998 |
| 5739866 | System and method for inserting and recovering an on data signal for transmission with a video signal A system and method for modulating a data signal uses a phase shifting transformer function to phase shift the lower and upper sidebands of the data signal so that the sidebands of the data signal have a 180° phase shift with respect to each other (i.e.,... | 04/14/1998 |
| 5708476 | System and method for inserting and recovering a data signal for transmission with a video signal A system and method for inserting a data signal into a preexisting video signal in a transmitter so that the data signal is transmitted along with the video signal. The data signal is inserted into an unused portion of the video signal spectrum. The data ... | 01/13/1998 |
| 5629739 | Apparatus and method for injecting an ancillary signal into a low energy density portion of a color television frequency spectrum An ancillary signal is injected into a program signal within the frequency band normally occupied by the program signal alone. The program signal includes a modulated carrier having a carrier frequency and a low energy density portion of the frequency ban... | 05/13/1997 |
| 5621471 | System and method for inserting and recovering an add-on data signal for transmission with a video signal A system and method for modulating a data signal uses a phase shifting transformer function to phase shift the lower and upper sidebands of the data signal so that the sidebands of the data signal have a 180° phase shift with respect to each other (i.e.,... | 04/15/1997 |
| 5587743 | Signal processors for transparent and simultaneous transmission and reception of a data signal in a video signal Signal processors for permitting the transparent, simultaneous transmission and reception of a data signal in the video bandwidth is disclosed. The signal processor in the transmitter rasterizes the data at the horizontal scanning rate and modulates the d... | 12/24/1996 |
| 5557333 | System for transparent transmission and reception of a secondary data signal with a video signal in the video band Signal processors for permitting the transparent, simultaneous transmission and reception of a secondary data signal with a video signal in the video band is disclosed. The signal processor in the transmitter rasterizes the data at the horizontal scanning... | 09/17/1996 |
| 5555024 | Transmitters for burying digital signals within the trace and retrace intervals of NTSC television signals An NTSC television signal transmitter also transmits through the same transmission channel a suppressed data carrier having a frequency differing from that of video carrier, having a symbol rate that is a multiple of horizontal scanning rate of video sign... | 09/10/1996 |
| 5539471 | System and method for inserting and recovering an add-on data signal for transmission with a video signal A system and method for inserting a data signal into a preexisting video signal in a transmitter so that the data signal is transmitted along with the video signal. The data signal is inserted into an unused portion of the video signal spectrum. The data ... | 07/23/1996 |
| 5534932 | Letterbox television system In a method of transmitting an extended television signal comprising a wide aspect ratio picture between two horizontal bars so as to form a standard aspect ratio picture, in which vertical resolution enhancement signals are transmitted to improve the ver... | 07/09/1996 |
| 5517252 | Device for reproducing picture signals in letter-box format An apparatus for recording/reproducing television signals transmitted in the letter-box format whereby 16:9 aspect ratio picture information is sandwiched between black areas corresponding to the top and bottom portions of the display, and wherein auxilia... | 05/14/1996 |
| 5510845 | Receivers for digital signals buried within the trace and retrace intervals of NTSC television signals An NTSC television signal transmitter also transmits through the same transmission channel a suppressed data carrier having a frequency differing from that of video carrier, having a symbol rate that is a multiple of horizontal scanning rate of video sign... | 04/23/1996 |
| 5410360 | Timing control for injecting a burst and data into a video signal A secondary signal is processed and injected into a primary color video signal. The timing of the subsequent transmission of the secondary signal is controlled by timing signals. The timing signals also control the transmission of a carrier burst prior to... | 04/25/1995 |
| 5387941 | Data with video transmitter Signal processors for permitting the transparent, simultaneous transmission and reception of a data signal in the video bandwidth is disclosed. The signal processor in the transmitter rasterizes the data at the horizontal scanning rate and modulates the d... | 02/07/1995 |
| 5357284 | Compatible digital audio for NTSC television A method and apparatus for transmitting a digitally modulated Quadrature Phase Keyed (QPSK) audio carrier signal, or a digitally modulated Quadrature Partial Response System (QPRS) audio carrier signal, wherein the audio carrier signal is located 1.2 MHz ... | 10/18/1994 |
| 5229847 | Television signal processing system including modulated auxiliary carrier In one embodiment an encoded compatible widescreen television signal includes first and second auxiliary carriers amplitude modulated with side panel chrominance information. The first and second auxiliary carriers exhibit a significant phase shift (e.g.,... | 07/20/1993 |
| 5200822 | Arrangement for and method of processing data, especially for identifying and verifying airing of television broadcast programs Data are added invisibly to the active video component of a television signal by a modulated carrier. The data, upon recovery, may be used for numerous purposes, including network signaling, data transmission, program identification, remote machine contro... | 04/06/1993 |
| 5063446 | Apparatus for transmitting auxiliary signal in a TV channel Apparatus for converting a signal having a substantially continuous frequency spectrum to a signal having its energy concentrated at multiples of the line frequency of a video signal, includes circuitry for apportioning the signal into two intermediate si... | 11/05/1991 |
| 4119999 | Apparatus for inserting a digital sync word, phase-synchronized to the color subcarrier, in place of the horizontal sync signal Apparatus is disclosed for processing an analog color video information signal for recording on a magnetic media which involves stripping the horizontal synchronization pulses from the horizontal blanking intervals of the analog video information signal, ... | 10/10/1978 |
| 4078245 | System for multiplexing information channels adjacent to a video spectrum A system for multiplexing either a single or multiple information channels adjacent to the video spectrum on a TV microwave or cable by frequency modulating a high frequency subcarrier at wide deviation with one or composite information signals, translati... | 03/07/1978 |
| 3955211 | Multiplex transmission of television audio-visual signals The invention relates to the multiplexed transmission of television audio-visual signals which comprise, for example, a luminance signal successive chrominance signals and at least one audio signal. The method in accordance with the invention utilises a s... | 05/04/1976 |
