Intel Corporation

Paul S Gryskiewicz

Karl H Mauritz

Aniruddha P Joshi

Pranav H Mehta

A video controller may include at least one video input port which may be programmably configured to receive either RGB or non-RGB color space signals. The video controller may programmably operate in either an RGB or non-RGB mode. In this way, the number of color space conversions may be reduced in some embodiments. For example, where a television output device is coupled to the video controller, the video controller may provide a non-RGB output signal.

Programmably controlling video formats

Text and graphics elements may be alpha blended in a way to reduce flicker when the text or graphics are display by a processor-based television receiver. The alpha values are used to intelligently smooth pixels adjacent the element to create television text and graphics.

Blending text and graphics for display

An adaptive filter is adjustable for performing scaling operations. During a scaling operation, the adaptive filter stores scaled data in a memory such that more data samples may be retrieved during a subsequent scaling operation. The size of a finite impulse response filter used during the subsequent scaling operation may be adjusted to access the additional data samples.

Adaptive video scaler

Alpha values associated with video mixing operations are sent to a memory on a low pin count bus. The memory is accessible to a video mixer, which retrieves the alpha values to perform a mixing operation. The alpha values for a field are sent to the memory during the field time for a previous field rather than during the vertical blanking interval. The alpha values may be compressed prior to transmission.

Managing alpha values for video mixing operations

Two independent visually displayable data streams may be synchronized in real-time. One data stream may be converted to look like the other data stream prior to mixing the two data streams together. One data stream is buffered while the other data stream is converted. A memory buffer is used to synchronize the two data streams.

Synchronizing video streams with different pixel clock rates

Blending text and graphics for display on televisions

A circuit to provide one clock signal from a plurality of possible clock signals includes a register to receive indication of a data sampling frequency, a selection circuit operatively coupled to the register, the indicated data sampling frequency selecting one of a plurality of signals provided to the selection circuit, and a modification circuit to modify the selected signal based at least in part on the indicated sampling frequency. A method to automatically and dynamically provide one clock signal from a plurality of possible clock signals includes receiving a signal indicating a data sampling frequency, selecting one clock signal from a plurality of input clock signals based on the received data sampling frequency indication, and modifying the selected clock signal, based on the indicated sampling frequency, to generate an output clock signal. The modified selected signal (for the circuit) and the modified selected clock signal (for the method) may be provided as a clock signal to, for example, an audio processing circuit.

Clock selection for processing audio data

An interlaced video signal may be combined with a progressive video signal, such as a graphics signal, by converting the interlaced video signal into a progressive signal. A new frame of the converted progressive signal is constructed from each field of the interlaced signal. The graphics signal is interlaced, then combined with the converted progressive signal. The combined signals may then be transmitted to a display, such as a television set. The interlaced video signal, which is transmitted at twice its incoming speed, remains temporally correct so that operations, such as scaling and 3:2 pulldown, may be performed with minimal resulting artifacts. The small amount of memory used to combine the signals may be embedded in the receiver circuitry.

Growing community of inventors

Chandler, AZ, United States of America

Paul S Gryskiewicz