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Fault recovery of video bitstream in remote sessions

專利號
US10841621B2
公開日期
2020-11-17
申請人
Wyse Technology L.L.C.(US CA Santa Clara)
發(fā)明人
Oleg Rombakh; Richard Goldberg
IPC分類
H04N19/89; H04N19/44; H04N19/174
技術(shù)領(lǐng)域
bitstream,decoder,nalu,101a,remote,protocol,video,rbsp,slice_id,display
地域: CA CA Santa Clara

摘要

Fault recovery of a video bitstream can be performed in a remote session. A decoder of a remote display protocol client can be configured to process a video bitstream that is transferred over a virtual channel of a remote session. As part of processing the video bitstream prior to passing it to a hardware decoder, the decoder can detect the occurrence of an error in the bitstream and then cause the remote display protocol client to employ the remote display protocol which encapsulates the virtual channel to request an I-frame from the remote display protocol service. This will force the encoder to send an I-frame even if the desktop has low entropy thereby minimizing how long a glitch may persist. Because the remote display protocol itself is employed to request the I-frame, there is no requirement to modify the video stream protocol.

說明書

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When the server sends a video bitstream to the client terminal, it is possible that a frame will be dropped (e.g., due to corruption in the video bitstream caused by noise). If this happens, and other frames rely on the dropped frame, the video will likely be displayed with glitches. For example, if the video bitstream includes a series of P-frames and the first P-frame in the series is dropped, each of the subsequent P-frames will refer back to incomplete data (i.e., they will be based on information from the dropped P-frame). As a result, a glitch will appear in the display and persist until an I-frame is sent. If the video has low entropy, the decoder on the server may send I-frames relatively infrequently such that the glitch will persist for a relatively long period. In the context of a remote display protocol session in which the desktop display itself is treated as a video, this low entropy condition may be a common occurrence. For example, during a Power Point presentation, there may be sufficient similarity between slides such that the decoder will not generate an I-frame when the presentation is advanced. If a glitch occurs in this scenario, it could potentially remain for the duration of the presentation.

BRIEF SUMMARY

權(quán)利要求

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