Abstract:
Methods and systems are described for transmitting and displaying video data after a hot plug event during a start-up dead period. In particular, hot plug events occurring when a toggleable hot plug detection mechanism is use.
Abstract:
An apparatus includes a display panel capable of displaying content. The apparatus also includes a light sensor having an integrated circuit and a photo-sensitive device. The photo-sensitive device is capable of measuring an amount of ambient light. The integrated circuit is capable of performing one or more functions associated with the display of the content on the display panel. The apparatus further includes a controller capable of adjusting one or more characteristics of the display panel based on the amount of ambient light measured by the light sensor. The integrated circuit and the photo-sensitive device may be formed on one side of a semiconductor wafer, and the photo-sensitive device may be exposed to the ambient light through an opening in an opposing side of the semiconductor wafer.
Abstract:
This invention relates to cognitive radio based wireless communications of dynamic spectrum access networks, and more particularly to a method of addressing messaging control for dynamic frequency selection. The method of the invention provides an efficient, reliable and flexible messaging mechanism for DFS decision-making that is critical for licensed incumbent protection and inter-system coexistence of dynamic spectrum access systems.
Abstract:
A method and circuit to stop a spindle motor in the absence of the external supply voltage in which the spindle motor is structured to move a hard disk provided with at least one reading or writing head moved by a voice coil motor, the spindle motor provided with a plurality of coils. The method includes rectifying the backelectromotive force of the spindle motor to produce a braking current, driving the voice coil motor with at least a portion of the braking current until the speed of the spindle motor becomes lower than a predetermined stop speed, and, after the parking of the at least one reading or writing head of the voice coil motor, stopping the spindle motor by short-circuiting the coils of the spindle motor.
Abstract:
A method for varying gain exponentially with respect to a control signal is provided. The method includes receiving a primary control signal. A secondary control signal is generated based on the primary control signal. The secondary control signal is provided to a variable gain amplifier and is operable to exponentially vary a gain for the variable gain amplifier with respect to the primary control signal.
Abstract:
The invention provides a method and system for operating a pipelined microprocessor more quickly, by detecting instructions that load from identical memory locations as were recently stored to, without having to actually compute the referenced external memory addresses. The microprocessor examines the symbolic structure of instructions as they are encountered, so as to be able to detect identical memory locations by examination of their symbolic structure. For example, in a preferred embodiment, instructions that store to and load from an identical offset from an identical register are determined to be referencing the identical memory location, without having to actually compute the complete physical target address.
Abstract:
An electronic system, an integrated circuit and a method for display are disclosed. The electronic system contains a first device, a memory and a video/audio compression/decompression device such as a decoder/encoder. The electronic system is configured to allow the first device and the video/audio compression/decompression device to share the memory. The electronic system may be included in a computer in which case the memory is a main memory. Memory access is accomplished by one or more memory interfaces, direct coupling of the memory to a bus, or direct coupling of the first device and decoder/encoder to a bus. An arbiter selectively provides access for the first device and/or the decoder/encoder to the memory based on priority. The arbiter may be monolithically integrated into a memory interface. The decoder may be a video decoder configured to comply with the MPEG-2 standard. The memory may store predicted images obtained from a preceding image.
Abstract:
A method includes extracting at least one object file from a library of object files. The method also includes identifying an interprocedural optimization associated with a plurality of object files. The plurality of object files includes the at least one extracted object file. The method further includes invoking recompilation of at least one of the plurality of object files to implement the identified interprocedural optimization. In addition, the method includes generating at least one executable file using the at least one recompiled object file. The plurality of object files could include interprocedural summary information generated by a compiler during a compilation of at least one source file and a compiler internal representation associated with the compiler during the compilation. The interprocedural optimization could be identified using the interprocedural summary information, and the at least one recompiled object file could be generated using the compiler internal representation.
Abstract:
A gain controller for a gain loop of a read channel includes a comparator circuit, an accumulator circuit, and a function circuit. The comparator circuit determines an error between an actual sample of a read signal and a corresponding ideal sample of the read signal, and the accumulator circuit holds a gain-correction value and adjusts the gain-correction value in response to the error. The function circuit generates a gain-correction signal by performing a predetermined mathematical operation involving the gain-correction value, and provides the gain-correction signal to a variable-gain amplifier that is operable to amplify actual samples of the read signal. Because such a gain controller allows one to locate the variable-gain amplifier (VGA) after the analog-to-digital converter (ADC) in a read channel, the gain controller may significantly reduce the latency of the gain-acquisition (GA) loop or the gain-tracking (GT) loop of the read channel. The gain controller may also allow the GA loop and the GT loop to be completely contained with in the digital portion of the read channel.
Abstract:
There is disclosed a data processor that executes variable latency load operations using bypass circuitry that allows load word operations to avoid stalls caused by shifting circuitry. The processor comprises: 1) an instruction execution pipeline comprising N processing stages, each of the N processing stages for performing one of a plurality of execution steps associated with a pending instruction being executed by the instruction execution pipeline; 2) a data cache for storing data values used by the pending instruction; 3) a plurality of registers for receiving the data values from the data cache; 4) a load store unit for transferring a first one of the data values from the data cache to a target one of the plurality of registers during execution of a load operation; 5) a shifter circuit associated with the load store unit for shifting the first data value prior to loading the first data value into the target register; and 6) bypass circuitry associated with the load store unit for transferring the first data value from the data cache directly to the target register without processing the first data value in the shifter circuit.