摘要:
Systems and methods for block noise detection and filtering are disclosed. One embodiment includes, computing difference magnitudes in pixel values for adjacent pixels in the image. The difference magnitudes can include horizontal difference magnitudes for horizontally adjacent pixels and vertical difference magnitudes for vertically adjacent pixels. One embodiment further includes using normalized sums of the difference magnitudes to determine a set of noise characteristics of the block noise and a set of image characteristics of the image and configuring inputs to the block noise filter using the set of noise and image characteristics.
摘要:
Apparatuses and methods are described for performing time base correction and frame rate conversion with respect to signals. An apparatus includes circuitry to synthesize an output video clock. The apparatus has circuitry that receives an input video synchronization signal. The apparatus has circuitry to change a frequency of the output video clock based on an intended number of video clock cycles per input vertical period and a period of the input video synchronization signal.
摘要:
A technique for reducing noise in a digital video signal is disclosed. In one embodiment, the technique involves receiving a digital signal. The digital signal can be filtered thereby generating a filtered signal. The digital signal and the filtered signal can be mixed according to a composite blend map thereby generating an optimized signal. The optimized signal can be provided as an output.
摘要:
A digital image processor is provided. The digital image processor includes a deinterlacing processor that is implemented upon a digital processing unit. The deinterlacing processor is coupled to an input operable to receive an interlaced video stream, a digital memory for storing portions of the interlaced video signal, and an output operable to transmit a deinterlaced video stream. The deinterlacing processor is operable to detect the source type of the received interlaced video stream to generate the deinterlaced video stream having reduced or no motion artifacts.
摘要:
An apparatus and a method are provided for smoothing out high frequency information in an interlaced computer generated display. A computer generated RGB signal is converted into a YUV signal, which is separated into its Y, U, and V components. The Y component is convolved by averaging a current scan line with a line above and a line below the current scan line so that black lines are lightened and white lines are darkened, thus avoiding flicker. Since convolution is only performed on the Y part of the YUV signal, only two line buffers, each having a width equal to the number of bits in the Y component only, are required.
摘要:
A digital image processor is provided. The digital image processor includes a deinterlacing processor that is implemented upon a digital processing unit. The deinterlacing processor is coupled to an input operable to receive an interlaced video stream, a digital memory for storing portions of the interlaced video signal, and an output operable to transmit a deinterlaced video stream. The deinterlacing processor is operable to perform frequency analysis upon the received interlaced video stream in order to generate the deinterlaced video stream having reduced motion artifacts.
摘要:
A digital image enhancer includes a deinterlacing processor receptive to an interlaced video stream. The deinterlacing processor includes a first deinterlacer and a second deinterlacer and provides a deinterlaced video stream. The digital image enhancer also includes a video output processor receptive to the output of the deinterlaced video stream to provide a scaled, deinterlaced video stream. A portable DVD player including the digital video enhancer has a generally thin prismatic enclosure having a first major surface, a second major surface separated from said first major surface, and side surfaces connecting the first major surface to the second major surface. At least a portion of the first major surface includes a video display, and the enclosure includes a DVD entry port such that a DVD can be inserted into the enclosure.
摘要:
A digital image processor includes an input buffer operable to receive an interlaced video stream and a digital memory for storing portions of the interlaced video stream. An output buffer is operable to transmit a deinterlaced video stream. Also included is a deinterlacing processor coupled between said input buffer and said output buffer and to said digital memory, said deinterlacing processor is operable to store portions of said received interlaced video stream from said input buffer into said digital memory and to detect diagonal features in said portions of said received interlaced video stream in said digital memory, and to generate said deinterlaced video stream having smoothed diagonal features therefrom.
摘要:
A digital image processor is provided. The digital image processor includes a shift register having a number of serially connected registers. The shift register is receptive to an image data word signal and has a plurality of taps. A coefficient store provides a number of quantized coefficients in which the number of coefficients stored corresponds to an integer multiple of the taps. A number of multipliers are provided, each having a first input coupled to a tap of the shift register and having a second input coupled to the coefficient store to receive a coefficient to provide a number of multiplied output. An adder is coupled to the multiplied outputs, wherein the adder generates a filtered and scaled image data output signal.
摘要:
A digital image processor is provided. The digital image processor includes a deinterlacing processor coupled between an input buffer operable to receive an interlaced video stream and an output operable to transmit a deinterlaced video stream. The deinterlacing processor is also coupled to a digital memory for storing portions of the interlaced video signal. The deinterlacing processor is operable to detect said diagonal features in the portions of the received interlaced video stream and to generate the deinterlaced video stream having smoothed diagonal features.