US 11,695,812 B2
Sharing physical writing surfaces in videoconferencing
Timothy Alan Port, Drummoyne (AU); and Richard J. Cartwright, Killara (AU)
Assigned to DOLBY LABORATORIES LICENSING CORPORATION, San Francisco, CA (US)
Appl. No. 17/423,061
Filed by DOLBY LABORATORIES LICENSING CORPORATION, San Francisco, CA (US)
PCT Filed Jan. 14, 2020, PCT No. PCT/US2020/013548
§ 371(c)(1), (2) Date Jul. 14, 2021,
PCT Pub. No. WO2020/150267, PCT Pub. Date Jul. 23, 2020.
Claims priority of provisional application 62/958,124, filed on Jan. 7, 2020.
Claims priority of provisional application 62/792,219, filed on Jan. 14, 2019.
Prior Publication US 2022/0124128 A1, Apr. 21, 2022
Int. Cl. H04L 65/403 (2022.01); H04N 19/593 (2014.01); G06V 20/40 (2022.01); H04M 3/42 (2006.01); H04N 7/01 (2006.01); G10L 15/26 (2006.01)
CPC H04L 65/403 (2013.01) [G06V 20/44 (2022.01); G06V 20/48 (2022.01); G06V 20/49 (2022.01); H04M 3/42221 (2013.01); H04N 7/0127 (2013.01); H04N 19/593 (2014.11); G10L 15/26 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of generating a record of content appearing on a physical surface and captured on video, the method comprising:
generating, by a video camera, video data that includes image data of the physical surface;
identifying, in an identifier component, by applying a difference measure to the video data, at least one period of interest in the video data by receiving an uncompressed video stream representing the video data and performing encoding on the uncompressed video stream to generate a compressed video stream in an encoder component, transmitting the compressed video stream from the encoder component to a decoder component, and performing decoding of the compressed video stream in the decoder component to generate decompressed video data, wherein the encoder component is placed in a transmitting endpoint and the decoder component placed in a receiving endpoint, wherein the decompressed video data includes a plurality of intra-frames;
for each period of interest of the at least one period of interest, selecting, in an image selector component, a still image of the image data of the physical surface;
wherein the still image is selected from the plurality of intra-frames of the period of interest; and
generating a set of images that includes each still image for the at least one period of interest in the video data, wherein the set of images provides snapshots of the content appearing on the physical surface.