Zoom Video Communications, Inc.

Maxim Integrated Products, Inc.

Geo Semiconductor Inc.

Cisco Technology, Inc.

Huipin Zhang

Zhaofeng Jia

Dingping Jiang

Liang Wang

Juan Jiang Wald

Jing Wu

Qiyong Liu

Kai Jin

Guy Cote

José Roberto Alvarez

Jiangtao Wen

Yi Guo

Sijia Chen

Dunbi Huang

In various embodiments, a group photograph system coordinates and creates a group photograph of participants of a video conferencing session. Using inputs from the participants, the group photograph system captures images of individual participants and selectively assembles a group photograph based on the rating of each individual participant. In one embodiment, the group photograph system sends a countdown signal to a first participant and a second participant wherein the first participant and the second participant are part of a group photograph within a video conferencing session wherein the countdown signal represents an amount of time before a first participant image is captured of the first participant. In another embodiment, the group photography system captures the first participant image and a second participant image of the first participant and the second participant, respectively and creates a first group photograph which includes the first participant image and the second participant image.

Apparatus for capturing a group photograph during a video conferencing session

An apparatus and/or method discloses a video conference with enhanced audio quality using high-fidelity audio sharing ('HAS'). In one embodiment, a network connection between a first user equipment (“UE”) and a second UE is established via a communication network for providing an interactive real-time meeting. After sending a first calibration audio signal from the first UE to the second UE, a second calibration audio signal is retuned from the second UE to the first UE according to the first calibration audio signal. Upon identifying a far end audio (“FEA”) delay based on the first calibration audio signal and the second calibration audio signal, a first mixed audio data containing the first shared audio data and first FEA data is fetched from an audio buffer. The first FEA data is subsequently removed or extracted from the mixed audio data in response to the FEA delay.

Method and system for facilitating high-fidelity audio sharing

Method and apparatus for capturing a group photograph during a video conference session

Method and apparatus for capturing a group photograph during a video conferencing session

An apparatus and/or method discloses a video conference with enhanced audio quality using high-fidelity audio sharing ('HAS'). In one embodiment, a network connection between a first user equipment ('UE') and a second UE is established via a communication network for providing an interactive real-time meeting. After sending a first calibration audio signal from the first UE to the second UE, a second calibration audio signal is retuned from the second UE to the first UE according to the first calibration audio signal. Upon identifying a far end audio (&#x201c;FEA&#x201d;) delay based on the first calibration audio signal and the second calibration audio signal, a first mixed audio data containing the first shared audio data and first FEA data is fetched from an audio buffer. The first FEA data is subsequently removed or extracted from the mixed audio data in response to the FEA delay.

An error resilience method comprising: using a computer, creating and storing, in computer memory, one or more FEC filter tables for use by the FEC filter for selectively forwarding a FEC packet; selectively forwarding a request for the FEC packet through a FEC filter based on the FEC table and a dynamic packet loss level at a receiver; limiting a re-transmission request for a particular packet through the FEC filter based on a number of re-transmission requests for the particular packet; and selectively skipping a key frame request based on a number of key frame requests received from a plurality receiver devices, wherein the method is performed by one or more special-purpose computing devices.

Error resilience for interactive real-time multimedia application

Error resilience for interactive real-time multimedia applications

A method for coding video is disclosed. The method generally includes the steps of (A) receiving a video signal having a series of pictures, each of the pictures having a plurality of blocks, (B) analyzing the blocks to forecast if coding the blocks in a zero-residual coding mode would generate a plurality of artifacts, (C) disabling the zero-residual coding mode for the blocks forecasted to generate at least one of the artifacts and (D) enabling the zero-residual coding mode for the blocks forecasted to generate none of the artifacts.

Methods and/or apparatus for controlling zero-residual coding in predictive image/video coding

A method for determining optimal video encoding parameters is disclosed. The method generally includes the steps of (A) storing a plurality of configurable parameters each comprising a respective trial value, (B) generating a bitstream by encoding a test sequence of pictures using (i) a plurality of non-configurable parameters fixed in a design of the encoder, (ii) the configurable parameters and (iii) a plurality of dynamic parameters adjustable in real time by the encoder, (C) generating a reconstructed sequence of pictures by decoding the bitstream, (D) generating a quality metric based on the reconstructed sequence of pictures compared with the test sequence of pictures and (E) adjusting the respective trial values to optimize the quality metric.

Method and apparatus for selecting optimal video encoding parameter configurations

In one embodiment, a perceptual video coder obtains local video content, and calculates a feature index for each of one or more features of a video unit of the local video content. Each feature index is then directly mapped to a delta quantization parameter (QP) using a linear fractional model that explicitly establishes a relation between the delta QP and a Human Visual System (HVS) insensitivity index, e.g., where the delta QP is set based on a comparison between a local strength of the HVS insensitivity index and an overall strength of a particular frame of the local video content. Accordingly, a QP of an adaptive quantization may be refined by adding to it each delta QP, such that adaptive quantization may be performed on the video unit based on the refined QP.

Adaptive quantization for perceptual video coding

A method for encoding an image is disclosed. The method generally includes the steps, of (A) generating a quantization matrix as a function of at least four parameters, (B) optimizing the parameters to maximize a quality metric for encoding the image and (C) encoding the image with the quantization matrix as optimized.

Method and apparatus for modeling quantization matrices for image/video encoding

An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to (i) receive an image data stream comprising a plurality of frames each having a plurality of regions, (ii) select a particular region to be marked as being homogeneous or not homogeneous, and (iii) determine whether a group of neighboring regions to the selected region are qualified or not qualified. The second circuit may be configured to mark the selected region as being homogeneous when one or more of the adjacent regions are (i) qualified and (ii) previously marked as being homogeneous.

Growing community of inventors

Palo Alto, CA, United States of America

Huipin Zhang