Systeme unifie de communication a programmation regroupant les communications de l'art anterieur (telles que par exemple la television, la radio, l'impression transmise electroniquement, et les communications par ordinateur) ainsi que les nouveaux mass medias specifiques aux utilisateurs. Unified programming communication system involving communications of the prior art (such as eg television, radio, print transmitted electronically, and computer communications) and new mass media specific users. Dans le systeme unifie, des moyens (205) et procedes mettant en oeuvre des systemes d'ordinateurs ont la capacite de produire des informations specifiques a un utilisateur particulier, simultanement a chaque poste (26) d'une pluralite de postes d'abonnes (26). In the unified system, means (205) and methods employing computer systems have the ability to generate specific information to a particular user, simultaneously with each station (26) a plurality of subscriber stations ( 26).

Signal processing apparatus and methods.

An interactive video system is disclosed that processes a video data stream and an associated data stream corresponding to the video data stream. The interactive video system displays a video image defined by the video data stream on a display device (50) and performs interactive command functions specified by the associated data stream. The interactive command functions include commands that specify placement of a video display window (40), commands that specify parameters of graphical objects (44) that are associated with the video image and commands that specify pixel data or graphics description for the graphical object and commands for placement of selection windows (42) and that specify interactive functions for the selection windows.

Content programmer control of video and data display using associated data

A method and system for remotely accessing and controlling at least one of a target switch and a target computer using a target controller. The video information captured by the target controller is analyzed and compressed in order to reduce network traffic between the target controller and a controlling computer.

Method and system for intelligently controlling a remotely located computer

A system and method for accessing, controlling and monitoring a data processing device in which a video raster signal from the data processing device is analyzed to determine the information displayed on a video display monitor attached to the data processing device is used. The video raster signal is converted to a digital form and a cyclic redundancy check is performed on the digital data to determine the information contained in the video raster signal and to generate a compressed representation of that information. The information may then easily and quickly be transmitted to a remote location for analysis and review. Additionally, commands from the remote location can be transmitted to the system to control the data processing device.

System and method for remote monitoring and operation of personal computers

A remote access device is disclosed for capturing, digitizing and communicating video signals from a host computer to a remote computer. The remote computer returns keyboard and mouse signals through the remote access device to the host computer to control the host computer as though the remote keyboard and mouse were directly connected to the host computer. The remote access device includes a circuit module interface for the host computer that allows the remote access device to operate independently of any operating system characteristics associated with the host computer.

System and method for accessing and operating personal computers remotely

A television receiver including a MPU (15) with OSD cicuitry (20) on a single chip. The OSD circuitry includes multisystem detection circuitry (22) which counts the number of horizontal lines between vertical flyback pulses to determine the vertical frequency of the received standard signal and measures the time of a horizontal line using a fixed frequency signal to determine the horizontal frequency of the received standard signal and uses this information to control the outputs of a PLL (21) to synchronize the receiver to the received standard. The PLL includes a VCO (35) having a constant offset current applied to the control terminal to prevent alternating phases of the output control signal from the loop phase detector (39), which alternating phases cause jitter in the display.

TV receiver including multistandard OSD

A two-stage monolithic differential amplifier circuit employs electronic gain control of both of the stages in order to improve the signal-to-noise ratio of the circuit and to reduce signal distortion and cross-modulation at high-signal levels. The input differential stage operates with current-division gain control. The output signals of the input stage are applied to the second or output differential amplifier stage, in which the transistors each have emitter resistors connected to a common terminal. The emitter resistors each are shunted by the collector-emitter path of a shunt transistor which is rendered nonconductive for maximum gain reduction of the output stage and which is saturated for minimum gain reduction of the output stage. The DC level of the output stage is maintained substantially constant throughout the AC gain control range.

Gain controlled differential amplifier circuit

A TV receiver including a microprocessor and an on screen display on a single semiconductor chip. The OSD includes half dot logic and shifting to smooth the characters with a minimum of storage capacity required and the half dot logic is used in an edge enhancing circuit to generate a black surround. A simplified window generator is combined therewith to further improve the characters.

An OSD in a tv receiver including a window smoothing and edge enhancing

In a TV receiver including multistandard OSD circuitry a method and apparatus for positioning the display including a comparator which compares a predetermined count (position) with a count of the received horizontal frequency to provide delayed horizontal flyback pulses and a dot and column address generator which is synchronized to start with the delayed horizontal flyback pulses. Similar vertical positioning circuits are included.

Multistandard OSD in a TV receiver including display positioning

A gain control signal (VCTRL) is provided to a temperature compensating circuit (12) which produces a differential temperature compensating gain control signal (VDT) A gain compensating circuit (14) receives the differential temperature compensating gain control signal (VDT) and provides a differential gain and temperature compensating gain control signal (VDTG) to an amplifier (16) The differential gain and temperature compensating gain control signal (VDTG) varies the gain of the amplifier (16) to be substantially linear with respect to variation of the gain control signal (VCTRL) and to compensate for variation in temperature

Gerald K Lunn

Papers

TV receiver including multistandard OSD

Gain controlled differential amplifier circuit

An OSD in a tv receiver including a window smoothing and edge enhancing

Multistandard OSD in a TV receiver including display positioning

Temperature compensated decibel linear variable gain amplifier