Patents by Inventor Ho Hin Lau

Ho Hin Lau 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).

  • Patent number: 10771818
    Abstract: An encoder encodes pixels representative of a picture in a multimedia stream, generates a first approximate signature based on approximate values of pixels in a reconstructed copy of the picture, and transmits the encoded pixels and the first approximate signature. A decoder receives a first packet including the encoded pixels and the first approximate signature, decodes the encoded pixels, and transmits a first signal in response to comparing the first approximate signature and a second approximate signature generated based on approximate values of the decoded pixels. If a corrupted packet is detected, the multimedia application requests an intra-coded picture in response to the first approximate signature differing from the second approximate signature. The second signal instructs the decoder to bypass requesting an intra-coded picture and to continue decoding received packets in response to the first approximate signature being equal to the second approximate signature.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: September 8, 2020
    Assignee: ATI TECHNOLOGIES, ULC
    Inventors: Ihab Amer, Gabor Sines, Khaled Mammou, Haibo Liu, Edward Harold, Lei Zhang, Fabio Gulino, Ehsan Mirhadi, Ho Hin Lau
  • Patent number: 10708596
    Abstract: An encoder of a multimedia system encodes data representative of each image in a video stream to form a bitstream that is transmitted over a network to a decoder that decodes the bitstream and provides the decoded information to a multimedia application for display to the user. As consecutive images may have nearly identical pixel values, the multimedia system detects pixel value variations between consecutive images that are below a specified threshold to reduce active processing on such pictures, which includes, for example, encoding, decoding, and post-processing. The multimedia system either selectively encodes or selectively processes the current image that has pixel values that vary from an immediately preceding image within the specified threshold.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: July 7, 2020
    Assignee: ATI TECHNOLOGIES ULC
    Inventors: Ihab Amer, Fabio Gulino, Edward Harold, Boris Ivanovic, Haibo Liu, Ho Hin Lau, Gabor Sines, Catalin Beju
  • Patent number: 10523947
    Abstract: Systems, apparatuses, and methods for encoding bitstreams of uniquely rendered video frames with variable frame rates are disclosed. A rendering unit and an encoder in a server are coupled via a network to a client with a decoder. The rendering unit dynamically adjusts the frame rate of uniquely rendered frames. Depending on the operating mode, the rendering unit conveys a constant frame rate to the encoder by repeating some frames or the rendering unit conveys a variable frame rate to the encoder by conveying only uniquely rendered frames to the encoder. Depending on the operating mode, the encoder conveys a constant frame rate bitstream to the decoder by encoding repeated frames as skip frames, or the encoder conveys a variable frame rate bitstream to the decoder by dropping repeated frames from the bitstream.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: December 31, 2019
    Assignee: ATI Technologies ULC
    Inventors: Ihab Amer, Boris Ivanovic, Gabor Sines, Yang Liu, Ho Hin Lau, Haibo Liu, Kyle Plumadore
  • Publication number: 20190268622
    Abstract: An encoder encodes pixels representative of a picture in a multimedia stream, generates a first approximate signature based on approximate values of pixels in a reconstructed copy of the picture, and transmits the encoded pixels and the first approximate signature. A decoder receives a first packet including the encoded pixels and the first approximate signature, decodes the encoded pixels, and transmits a first signal in response to comparing the first approximate signature and a second approximate signature generated based on approximate values of the decoded pixels. If a corrupted packet is detected, the multimedia application requests an intra-coded picture in response to the first approximate signature differing from the second approximate signature. The second signal instructs the decoder to bypass requesting an intra-coded picture and to continue decoding received packets in response to the first approximate signature being equal to the second approximate signature.
    Type: Application
    Filed: May 10, 2019
    Publication date: August 29, 2019
    Inventors: Ihab AMER, Gabor SINES, Khaled MAMMOU, Haibo LIU, Edward HAROLD, Lei ZHANG, Fabio GULINO, Ehsan MIRHADI, Ho Hin LAU
  • Patent number: 10334276
    Abstract: An encoder encodes pixels representative of a picture in a multimedia stream, generates a first approximate signature based on approximate values of pixels in a reconstructed copy of the picture, and transmits the encoded pixels and the first approximate signature. A decoder receives a first packet including the encoded pixels and the first approximate signature, decodes the encoded pixels, and transmits a first signal in response to comparing the first approximate signature and a second approximate signature generated based on approximate values of the decoded pixels. If a corrupted packet is detected, the multimedia application requests an intra-coded picture in response to the first approximate signature differing from the second approximate signature. The second signal instructs the decoder to bypass requesting an intra-coded picture and to continue decoding received packets in response to the first approximate signature being equal to the second approximate signature.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: June 25, 2019
    Assignee: ATI Technologies ULC
    Inventors: Ihab Amer, Gabor Sines, Khaled Mammou, Haibo Liu, Edward Harold, Lei Zhang, Fabio Gulino, Ehsan Mirhadi, Ho Hin Lau
  • Publication number: 20190158836
    Abstract: An encoder of a multimedia system encodes data representative of each image in a video stream to form a bitstream that is transmitted over a network to a decoder that decodes the bitstream and provides the decoded information to a multimedia application for display to the user. As consecutive images may have nearly identical pixel values, the multimedia system detects pixel value variations between consecutive images that are below a specified threshold to reduce active processing on such pictures, which includes, for example, encoding, decoding, and post-processing. The multimedia system either selectively encodes or selectively processes the current image that has pixel values that vary from an immediately preceding image within the specified threshold.
    Type: Application
    Filed: November 20, 2017
    Publication date: May 23, 2019
    Inventors: Ihab AMER, Fabio GULINO, Edward HAROLD, Boris IVANOVIC, Haibo LIU, Ho Hin LAU, Gabor SINES, Catalin BEJU
  • Publication number: 20190104311
    Abstract: Systems, apparatuses, and methods for encoding bitstreams of uniquely rendered video frames with variable frame rates are disclosed. A rendering unit and an encoder in a server are coupled via a network to a client with a decoder. The rendering unit dynamically adjusts the frame rate of uniquely rendered frames. Depending on the embodiment, the rendering unit conveys a constant frame rate to the encoder by repeating some frames or the rendering unit conveys a variable frame rate to the encoder by conveying only uniquely rendered frames to the encoder. Depending on the embodiment, the encoder conveys a constant frame rate bitstream to the decoder by encoding repeated frames as skip frames, or the encoder conveys a variable frame rate bitstream to the decoder by dropping repeated frames from the bitstream.
    Type: Application
    Filed: September 29, 2017
    Publication date: April 4, 2019
    Inventors: Ihab Amer, Boris Ivanovic, Gabor Sines, Yang Liu, Ho Hin Lau, Haibo Liu, Kyle Plumadore
  • Publication number: 20170188051
    Abstract: An encoder encodes pixels representative of a picture in a multimedia stream, generates a first approximate signature based on approximate values of pixels in a reconstructed copy of the picture, and transmits the encoded pixels and the first approximate signature. A decoder receives a first packet including the encoded pixels and the first approximate signature, decodes the encoded pixels, and transmits a first signal in response to comparing the first approximate signature and a second approximate signature generated based on approximate values of the decoded pixels. If a corrupted packet is detected, the multimedia application requests an intra-coded picture in response to the first approximate signature differing from the second approximate signature. The second signal instructs the decoder to bypass requesting an intra-coded picture and to continue decoding received packets in response to the first approximate signature being equal to the second approximate signature.
    Type: Application
    Filed: December 28, 2015
    Publication date: June 29, 2017
    Inventors: Ihab Amer, Gabor Sines, Khaled Mammou, Haibo Liu, Edward Harold, Lei Zhang, Fabio Gulino, Ehsan Mirhadi, Ho Hin Lau