Abstract: A method for determining timing synchronization for demodulating a signal by a receiver, comprises the steps of: generating a channel response for the signal; transforming the signal into the time domain using an inverse fast fourier transform (“IFFT”); determining a signal power for the transformed signal as a function of the generated channel response; and calculating the timing synchronization by the receiver as a function of the determined signal power.

Abstract: A method for encoding motion vectors, comprises the steps of: determining motion vectors and flags for sub-blocks of a macroblock (“MB”) as a function of SAD calculations for the MB; generating one or more merged motion vectors for the sub-blocks of the MB as a function of the determined motion vectors and the determined flags; generating a merged macroblock motion vector for the MB as a function of the generated merged motion vectors and of the determined flags; and encoding the determined motion vectors as a function of the generated merged motion vectors and the generated merged macroblock motion vector.

Abstract: A method for demapping a multicarrier signal into soft bits by a receiver, comprises the steps of: calculating signal to noise ratio (“SNR”) adjustment factors (“A[segidx]”) for segments of the signal, wherein each of the segments has a predefined number of subcarriers of the signal; generating an adjusted SNR (“SNR[segidx]”) as a function of an average SNR over the subcarriers of the signal and of the calculated SNR adjustment factors; and determining the soft bits for the signal as a function of the signal, a channel estimation for the signal, and the adjusted SNR, wherein the receiver decodes the determined soft bits.

Abstract: A method for comparing a target block to a reference window in motion estimation calculations, comprises the steps of: determining SAD calculations as a function of the target block and the reference window; reading the target block into registers; reading a segment of the reference window; updating the determined SAD calculations on the fly as a function of the read target block and the read segment of the reference window; and determining one or more sub-blocks of the reference window having minimum SAD values as a function of the updated SAD calculations; and if one or more of the minimum SAD values are not found, repeating the reading a segment step, the updating step and the determining step for a next segment of the reference window.

Abstract: Some embodiments of the present invention provide a method and apparatus for a Vernier ring time to digital converter having a single clock input and an all digital circuit that calculates a fixed delay relationship between a set of slow buffers and fast buffers. A method for calibrating a Vernier Delay Line of a TDC, comprising the steps of inputting a reference clock to a slow buffer and to a fast buffer, determining a delay ratio of the slow buffer and fast buffer; and adjusting the delay ratio of the slow buffer and fast buffer to a fixed delay ratio value wherein an up-down accumulator generates control signals to adjust the slow buffer.

Abstract: A method for channel estimation of a signal, comprises the steps: estimating a channel response for pilot carriers of the signal; and estimating a channel response for non-pilot carriers of the signal as a function of the channel response for the pilot carriers of the signal and channel estimation coefficients for the pilot carriers, wherein a symbol of the signal is decoded as a function of the estimated channel response for the non-pilot carriers, and wherein certain ones of the channel estimation coefficients are updated as a function of the decoded symbol.

Abstract: A method for channel estimation of a signal, comprises the steps: estimating a channel response for pilot carriers of the signal; and estimating a channel response for non-pilot carriers of the signal as a function of the channel response for the pilot carriers of the signal and channel estimation coefficients for the pilot carriers, wherein a symbol of the signal is decoded as a function of the estimated channel response for the non-pilot carriers, and wherein certain ones of the channel estimation coefficients are updated as a function of the decoded symbol.

Abstract: A method for 3D content detection, comprises the steps of: receiving a frame of video data comprising cells, wherein the cells are partitioned into a first area and a second area, and wherein the cells of the first area and the cells of the second area have one or more video characteristics; comparing the video characteristics of the cells of the first area with the video characteristics of the cells of the second area; and determining whether the frame has 3D content as a function of the compared video characteristics of the cells.

Abstract: A method and apparatus for processing a current macro-block of a current frame for motion compensation based on reference data from a reference frame using a sliding window cache to cache the reference data are disclosed. The method steps comprise processing a current sub-block of the current macro-block for motion compensation, determining the reference data for the current sub-block based on a reference sub-block in the reference frame, determining whether the reference data is within a sliding window, if the reference data is within the sliding window, checking for a valid tag corresponding to the reference data, responsive to the valid tag, retrieving the reference data from within the sliding window cache and processing the reference data for motion compensation.

Abstract: A method for demosaicing color filter array (“CFA”) pixels, comprises the steps of: receiving an array of the CFA pixels; demosaicing certain ones of the CFA pixels as a function of the relative vertical positions of the certain ones of the CFA pixels in the array, wherein the certain ones of the CFA pixels are along a first column of the array; and outputting, in parallel, the demosaiced certain ones of the CFA pixels for post-processing of the CFA pixels.

Abstract: A method for channel estimation of a signal by a receiver, comprises the steps of: receiving a symbol of the signal, wherein the signal has a cyclic prefix (“CP”); combining a portion of the CP and an end portion of the symbol; and processing the combined symbol for channel estimation by the receiver.

Abstract: A method for detecting motion in video fields of video data, comprises the steps of: calculating texture information for a pixel in the video fields; determining a threshold value as a function of the calculated texture information; calculating a differential value for the pixel; and detecting motion in the video fields as a function of the determined threshold value and the calculated differential value.

Abstract: A method for detecting edges in a video field, comprising the steps of: selecting edges for a pixel of the video field; determining sum of absolute differences (“SAD”) values for the selected edges; determining inverse SAD (“ISAD”) values for the selected edges; and detecting one or more certain ones of the selected edges as a valid edge as a function of the determined SAD values and the determined ISAD values.

Abstract: A method for processing a signal by a receiver, comprises the steps of: receiving the signal by the receiver, calculating one or more symbols based on the received signal; determining a multipath delay spread from the received signal; rebuilding one or more of the calculated symbols as a function of the multipath delay spread; and processing the rebuilt symbols for decoding by the receiver.

Abstract: A method for detecting motion in video fields of video data, comprises the steps of: calculating texture information for a pixel in the video fields; determining a threshold value as a function of the calculated texture information; calculating a differential value for the pixel; and detecting motion in the video fields as a function of the determined threshold value and the calculated differential value.

Abstract: Methods for channel estimation for OFDM schemes are provided to combat multipath fading. Scattered pilot symbols are adaptively tracked by applying a weighted summation function over the received symbols to get a “snapshot” of the pilot symbols. Channel impulse response and frequency response can then be applied to the snapshot for channel estimation. The channel estimation is then used for interpolating one or more data symbols. Furthermore, the path information of the channel impulse response can help to optimize the OFDM window position.

Abstract: An adaptive digital phase locked loop comprises: a digital configurable phase detector for receiving a reference signal and a feedback signal and for generating a detection signal indicative of a phase/frequency difference between the reference signal and the feedback signal; a configurable digital loop filter for filtering the DPFD detection signal; a digital locking monitor for monitoring polarity transitions of the detection signal and adaptively switching the locking modes and DCO tuning resolution; and a DCO for generating the feedback signal as a function of the detection signal.

Abstract: An adaptive digital phase locked loop comprises: a digital configurable phase detector for receiving a reference signal and a feedback signal and for generating a detection signal indicative of a phase/frequency difference between the reference signal and the feedback signal; a configurable digital loop filter for filtering the DPFD detection signal; a digital locking monitor for monitoring polarity transitions of the detection signal and adaptively switching the locking modes and DCO tuning resolution; and a DCO for generating the feedback signal as a function of the detection signal.

Abstract: A method for digital phase detection, comprises the steps of: providing a reference clock; receiving a feedback clock; determining a timing difference between the reference clock and the feedback clock; determining a polarity that indicates the leading or lagging relationship between the reference clock and the feedback clock; adaptively selecting one of at least two operating modes for generating a quantized level indicative of the timing difference, wherein in a first operating mode the quantized level is a constant maximum value and wherein in a second operating mode the quantized level is proportional to the timing difference; and generating a digital phase detection output as a combination of the polarity and the quantized level.

Abstract: A method for operating a touch panel comprises the steps of: sensing an object in proximity to the touch panel; determining a location on the touch panel corresponding to the sensed object; determining a contact metric indicative of an amount of pressure applied on the touch panel by the sensed object; and operating the touch panel as a function of the location and the contact metric.