Patents by Inventor Wing-Chi Chow
Wing-Chi Chow has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240112294Abstract: Techniques described herein allow multi-pass writeback processing of graphical frames (such as those having a high or ultrahigh resolution) to reduce bandwidth for display operations by, for example, splitting an input stream for processing by separate graphical pipelines as two or more spatially segmented portions. After receiving a graphical frame for processing, the graphical frame is spatially segmented into multiple portions. Each of the multiple portions is provided to a respective graphical pipeline of a plurality of graphical pipelines for processing. Each processed portion of the graphical frame is written substantially simultaneously to a corresponding portion of a system memory.Type: ApplicationFiled: September 30, 2022Publication date: April 4, 2024Inventors: Jie Zhou, Wing-Chi Chow
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Publication number: 20240114150Abstract: A display processing device includes a display device interface and a processing unit. The processing is configured to transition at least a first component of the display processing system into a low-power state in response to an active region of a first video frame of a plurality of video frames having completed. A second component of the display processing device is configured to maintain a temporal count value corresponding to a current frame line of the plurality of video frames, and further to generate a first signal in response to the temporal count value corresponding to a first trigger value. The first signal causes the at least first component to transition out of the low-power state.Type: ApplicationFiled: September 29, 2022Publication date: April 4, 2024Inventors: Wing-Chi Chow, Yee Shun Chan, Nicholas James Chorney, Minghua Zhu
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Patent number: 11012094Abstract: A programmable digital data encoder employs error correcting coding that uses Galois field multiplication logic wherein each bit of the product is produced by first applying pre-calculated mask values or mask values calculated via a processor executing code, and then applying an XOR circuit together with the mask bits from the pre-calculated or generated mask. In one example, a set of Galois field multipliers is used wherein each multiplier in the set includes a plurality of 2-bit input AND gate circuits and an m-bit input XOR gate circuit to produce a bit of the product. In one example, there are “m” mask values in a mask table wherein m is the symbol width. A different mask value is applied for each bit of the product. The mask values are each m-bits wide, and are stored, for example, in memory as a small look-up table with m m-bit entries or in m m-bit wide registers.Type: GrantFiled: December 13, 2018Date of Patent: May 18, 2021Assignee: ATI Technologies ULCInventor: Wing-Chi Chow
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Publication number: 20200195275Abstract: A programmable digital data encoder employs error correcting coding that uses Galois field multiplication logic wherein each bit of the product is produced by first applying pre-calculated mask values or mask values calculated via a processor executing code, and then applying an XOR circuit together with the mask bits from the pre-calculated or generated mask. In one example, a set of Galois field multipliers is used wherein each multiplier in the set includes a plurality of 2-bit input AND gate circuits and an m-bit input XOR gate circuit to produce a bit of the product. In one example, there are “m” mask values in a mask table wherein m is the symbol width. A different mask value is applied for each bit of the product. The mask values are each m-bits wide, and are stored, for example, in memory as a small look-up table with m m-bit entries or in m m-bit wide registers.Type: ApplicationFiled: December 13, 2018Publication date: June 18, 2020Inventor: WING-CHI CHOW
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Patent number: 7671922Abstract: A unique method for chroma vertical upsampling used, for example, for conversion of the “4:2:0” format chroma information used in many applications of digital video, to the “4:2:2” or “4:4:4” format, is presented. This conversion is required so that video encoders can effect the display of this chroma information with a minimum of visible artifacts. The present invention carries out chroma vertical upsampling on a pixel by pixel basis. This chroma vertical upsampling is performed as a function of the amount of motion associated with each pixel as detected between 2 or more fields, and the field, frame and progressive sequence characteristics of the incoming video signal data.Type: GrantFiled: December 3, 2008Date of Patent: March 2, 2010Assignee: Zoran CorporationInventors: Pasquale Leone, Wing-Chi Chow, Aharon Gill
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Patent number: 7612829Abstract: Improved 2:2 and 3:2 pull-down detection techniques are presented. These techniques can, for example, be used when converting an interlaced video signal into a progressive video signal. The improved techniques are less susceptible to bad edits. In one embodiment, comparison values are generated using consecutive fields of the interlaced video signal having the same parity, with a sequence of one small comparison value followed four large comparison values, where the four large comparison values include two pairs of similar large comparison values, is used to indicate a 3:2 pull-down.Type: GrantFiled: September 13, 2005Date of Patent: November 3, 2009Assignee: Zoran CorporationInventor: Wing-Chi Chow
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Patent number: 7515210Abstract: A technique for determining the slope of a field pixel is described. According to the technique, one or more sets of diagonal field pixels are downscaled (or downsampled) before they are provided to respective edge detector circuits. By downscaling the sets of diagonal field pixels before they are provided to respective detector circuits, the edge detector circuits detect diagonal edges and, in particular, shallow diagonal edges with greater accuracy. As such, the slopes assigned to the field pixels are more likely to be correct. This ultimately results in a high quality progressive video signal that can be used to generate an image that is completely or substantially free from objectionable artifacts.Type: GrantFiled: June 5, 2006Date of Patent: April 7, 2009Assignee: Zoran CorporationInventor: Wing-Chi Chow
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Publication number: 20090079867Abstract: A unique method for chroma vertical upsampling used, for example, for conversion of the “4:2:0” format chroma information used in many applications of digital video, to the “4:2:2” or “4:4:4” format, is presented. This conversion is required so that video encoders can effect the display of this chroma information with a minimum of visible artifacts. The present invention carries out chroma vertical upsampling on a pixel by pixel basis. This chroma vertical upsampling is performed as a function of the amount of motion associated with each pixel as detected between 2 or more fields, and the field, frame and progressive sequence characteristics of the incoming video signal data.Type: ApplicationFiled: December 3, 2008Publication date: March 26, 2009Applicant: Zoran CorportionInventors: Pasquale Leone, Wing-Chi Chow, Aharon Gill
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Patent number: 7474355Abstract: A unique method for chroma vertical upsampling used, for example, for conversion of the “4:2:0” format chroma information used in many applications of digital video, to the “4:2:2” or “4:4:4” format, is presented. This conversion is required so that video encoders can effect the display of this chroma information with a minimum of visible artifacts. The present invention carries out chroma vertical upsampling on a pixel by pixel basis. This chroma vertical upsampling is performed as a function of the amount of motion associated with each pixel as detected between 2 or more fields, and the field, frame and progressive sequence characteristics of the incoming video signal data.Type: GrantFiled: August 6, 2003Date of Patent: January 6, 2009Assignee: Zoran CorporationInventors: Pasquale Leone, Wing-Chi Chow, Aharon Gill
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Patent number: 7202907Abstract: Improved 2:2 and 3:2 pull-down detection techniques are presented. These techniques can, for example, be used when converting an interlaced video signal into a progressive video signal. The improved techniques are less susceptible to bad edits. In one embodiment, comparison values are generated using consecutive fields of the interlaced video signal having the same parity, with a sequence of one small comparison value followed four large comparison values, where the four large comparison values include two pairs of similar large comparison values, is used to indicate a 3:2 pull-down.Type: GrantFiled: April 9, 2002Date of Patent: April 10, 2007Assignee: Zoran CorporationInventor: Wing-Chi Chow
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Publication number: 20060209207Abstract: A technique for determining the slope of a field pixel is described. According to the technique, one or more sets of diagonal field pixels are downscaled (or downsampled) before they are provided to respective edge detector circuits. By downscaling the sets of diagonal field pixels before they are provided to respective detector circuits, the edge detector circuits detect diagonal edges and, in particular, shallow diagonal edges with greater accuracy. As such, the slopes assigned to the field pixels are more likely to be correct. This ultimately results in a high quality progressive video signal that can be used to generate an image that is completely or substantially free from objectionable artifacts.Type: ApplicationFiled: June 5, 2006Publication date: September 21, 2006Applicant: Zoran CorporationInventor: Wing-Chi Chow
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Patent number: 7079190Abstract: A technique for determining the slope of a field pixel is described. According to the technique, one or more sets of diagonal field pixels are downscaled (or downsampled) before they are provided to respective edge detector circuits. By downscaling the sets of diagonal field pixels before they are provided to respective detector circuits, the edge detector circuits detect diagonal edges and, in particular, shallow diagonal edges with greater accuracy. As such, the slopes assigned to the field pixels are more likely to be correct. This ultimately results in a high quality progressive video signal that can be used to generate an image that is completely or substantially free from objectionable artifacts.Type: GrantFiled: December 27, 2001Date of Patent: July 18, 2006Assignee: Zoran CorporationInventor: Wing-Chi Chow
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Publication number: 20060012707Abstract: The present disclosure describes improved 2:2 and 3:2 pull-down detection techniques. The techniques of the present invention can, for example, be used when converting an interlaced video signal into a progressive video signal.Type: ApplicationFiled: September 13, 2005Publication date: January 19, 2006Inventor: Wing-Chi Chow
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Publication number: 20050030422Abstract: A unique method for chroma vertical upsampling used, for example, for conversion of the “4:2:0” format chroma information used in many applications of digital video, to the “4:2:2” or “4:4:4” format, is presented. This conversion is required so that video encoders can effect the display of this chroma information with a minimum of visible artifacts. The present invention carries out chroma vertical upsampling on a pixel by pixel basis. This chroma vertical upsampling is performed as a function of the amount of motion associated with each pixel as detected between 2 or more fields, and the field, frame and progressive sequence characteristics of the incoming video signal data.Type: ApplicationFiled: August 6, 2003Publication date: February 10, 2005Inventors: Pasquale Leone, Wing-Chi Chow, Aharon Gill
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Publication number: 20030189667Abstract: The present disclosure describes improved 2:2 and 3:2 pull-down detection techniques. The techniques of the present invention can, for example, be used when converting an interlaced video signal into a progressive video signal.Type: ApplicationFiled: April 9, 2002Publication date: October 9, 2003Inventor: Wing-Chi Chow
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Publication number: 20030123753Abstract: A technique for determining the slope of a field pixel is described. According to the technique, one or more sets of diagonal field pixels are downscaled (or downsampled) before they are provided to respective edge detector circuits. By downscaling the sets of diagonal field pixels before they are provided to respective detector circuits, the edge detector circuits detect diagonal edges and, in particular, shallow diagonal edges with greater accuracy. As such, the slopes assigned to the field pixels are more likely to be correct. This ultimately results in a high quality progressive video signal that can be used to generate an image that is completely or substantially free from objectionable artifacts.Type: ApplicationFiled: December 27, 2001Publication date: July 3, 2003Applicant: ZORAN CORPORATIONInventor: Wing-Chi Chow
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Patent number: 6415345Abstract: A bus interface control system and method includes an on-demand bus master interface for independently requesting multistream data from host memory without interrupting processing of the host processor between independent requests for data packets. A plurality of digital signal processors share the host bus and utilize flexible data speed transfer depending upon demand of real time data that must be transferred from host memory. The master interface control system includes an packet by packet arbitor to facilitate maximum throughput of data on-demand by the plurality of processing unit.Type: GrantFiled: August 3, 1998Date of Patent: July 2, 2002Assignee: ATI TechnologiesInventors: Yung-Jung Wayne Wu, James C. Yee, Vladimir F. Giemborek, Stuart J. Lindsay, Wing-Chi Chow
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Patent number: 6272452Abstract: A universal asynchronous receiver transmitter (UART) emulation stage for modem communication uses a digital signal processor containing a software UART control program for sending UART control signals to hardware based UART emulation circuitry. The software UART control program communicates to a modem application interface program that is under control of a host processor. The UART emulation circuitry that is responsive to the control signals from the digital signal processor, includes dedicated transmit and receive FIFO buffer memory for storing modem data and also includes interrupt generation logic to generate an interrupt for the digital signal processor when the received FIFO buffer memory is at a predetermined threshold. The UART emulation circuitry also includes programmable control logic for facilitating host processor interrupt pacing to maintain high compatibility with legacy applications, namely DOS based applications.Type: GrantFiled: April 2, 1998Date of Patent: August 7, 2001Assignee: ATI Technologies, Inc.Inventors: Yung-Jung Wayne Wu, Vladimir F. Giemborek, Wing-Chi Chow
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Patent number: 6078742Abstract: The invention features a method and apparatus for use with a computer system having a memory and a bus (e.g., a PCI bus). The bus is monitored for detection of a bus cycle intended for a controller (e.g., a DMA controller) used to transfer data between a bus device and the memory. After detection, the bus device is used to claim the bus cycle and to emulate the response of the controller to the bus cycle.Type: GrantFiled: December 19, 1996Date of Patent: June 20, 2000Assignee: ATI InternationalInventor: Wing-Chi Chow