Abstract: A physical layer device for interfacing with multiple computing devices includes a digital core and first and second analog front ends. The digital core is operative to perform one or more functions of the physical layer device. Each of the first and second analog front ends is operative to perform signal conversion between a digital domain and an analog domain. The physical layer device further includes a digital switching circuit coupled to the digital core and to the first and second analog front ends. The digital switching circuit is operative to electrically connect the digital core to the first analog front end or the second analog front end as a function of a control signal applied to the digital switching circuit.

Abstract: A physical layer device for interfacing with multiple computing devices includes a digital core and first and second analog front ends. The digital core is operative to perform one or more functions of the physical layer device. Each of the first and second analog front ends is operative to perform signal conversion between a digital domain and an analog domain. The physical layer device further includes a digital switching circuit coupled to the digital core and to the first and second analog front ends. The digital switching circuit is operative to electrically connect the digital core to the first analog front end or the second analog front end as a function of a control signal applied to the digital switching circuit.

Abstract: A comb filter for use in a video decoder is described. The comb filter includes a line memory for storing as successive pairs of U and V samples of a decoded video signal corresponding to a previous horizontal line of video information and a line memory for storing a second previous horizontal line of video information. The filter also includes a circuit to calculate an average value of both U and V from a previous sample and a corresponding sample from a previous line. The filter also includes a circuit for calculating a correction term for each one of the averages. The correction term is calculated from the opposite color component as was used to calculate the average value.

Abstract: A digital-to-analog video encoder method and apparatus having unique equalization are disclosed. The encoder converts digital video signals into one or more analog video formats using one or more digital-to-analog converters. Equalization is provided to compensate for zero order hold effects of the digital-to-analog converters. Equalization is provided to a luminance signal and/or a chroma signal to equalize RGB, composite video, and super VHS video outputs. Multiplexed digital-to-analog converter inputs allow selection of several output formats.

Abstract: A novel finite impulse response filter apparatus and method. A multiplexed data stream composed of two or more data streams is provided as an input to a tapped delay line. Weight and sum operators are connected to the even or odd delay line taps and generate a filtered output. The filter operates on one data stream per cycle and generates a multiplexed output. In another form, odd weight and sum operates are connected to and odd taps generating two filtered outputs. The filter operates on both data streams in each cycle and generates two multiplexed outputs. A crossbar switch is disclosed for parsing the multiplexed outputs into the constituent filtered data streams. The filter stages may be cascaded.

Abstract: A video decoder is provided wherein digitized samples of an input video signal are produced at a fixed sampling rate and, from such digitized samples, a fixed number of re-sampled digitized samples are produced for each detected sync pulse included in the video signal. The re-sampled digitized samples are stored in a buffer memory and are retrieved from such buffer memory at a rate synchronized to the sync pulse. With such an arrangement, the analog to digital converter operates at a fixed sampling rate, and overflow situations are avoided.