System and method for low bandwidth display information transport

Inventors: Subir Ghosh (San Jose, CA); Gabriele Sartori (Fremont, CA)

Assignee: nComputing, Inc.

H04N19/40 G06F17/30905 H04N19/48 H04N19/70 H04N21/2358 H04N21/234309 H04N21/4113 H04N21/4122 H04N21/42607 H04N21/42653 H04N21/443 H04N21/454 H04N21/4516 H04N21/4621

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Quick Facts

Patent No.: US 9,635,373
App. No.: 14/879,838
Granted: Apr 25, 2017
Kind: B2

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Abstract

A digital video transmission system that operates with three different video rendering paths. A first rendering path operates by receiving display requests and rendering bit-mapped graphics in a local screen buffer. The display information in that local screen buffer is then encoded and transmitted to a remote display system that recreates the content of that local screen buffer in a video buffer of remote display system. A second rendering path operates by receiving encoded video stream requests that can be decoded by the remote display system. Such encoded video streams are sent to the remote display system with minimal addition transport encoding. The third rendering path handles encoded video streams that cannot be handled natively by the remote display system. Such video streams may be either transcoded before transmission or decoded and stored within the local screen buffer.

Claims (64)

1. A method of processing video information for a remote display system, the method comprising:

initiating a thin-client terminal session with a server system and the remote display system;

requesting graphics capabilities of the remote display system, wherein the graphics capabilities of the remote display system include a resolution, a color bit depth, and a video decoder type;

receiving the graphics capabilities of the remote display system;

initializing the server system based on the graphics capabilities of the remote display system;

receiving a display request that includes a digital video stream and a bit-mapped graphics request for the remote display system, the digital video stream being encoded in a first encoding format;

requesting the remote display system to transcode the digital video stream in response to receiving the display request;

determining the remote display system is unable to transcode the digital video stream based on the graphics capabilities of the remote display system and the first encoding format of the digital video stream;

transmitting the digital video stream to a video decoder at the server system in response to the determining that the remote display system is unable to transcode the digital video stream;

decoding the digital video stream into successive frames of video information based on the graphics capabilities of the remote display system;

writing the successive frames of the video information a thin-client screen buffer associated with the remote display system; and

transporting the successive frames of the video information to the remote display system.

2. The method of processing video information for the remote display system of claim 1 , further comprising: transmitting the decoded digital video stream to the remote display system.

3. The method of processing video information for the remote display system of claim 1 , wherein the method further comprises:

writing the bit mapped graphics request to thin-client screen buffer associated with the remote display system;

encoding the bit mapped graphics request based on the graphics capabilities of the remote display system; and

transmitting the encoded bit mapped graphics request to the remote display system.

4. The method of processing video information for the remote display system of claim 1 , wherein the digital video stream comprises a first digital video format, and the method further comprises: transcoding the set of individual decoded video frames into a second digital video format supported by the remote display system.

5. The method of processing video information for the remote display system of claim 4 , wherein the method further comprises:

determining that the server system is unable to transcode the set of individual decoded video frames due to a processing load;

decoding, by a video decoder, the encoded digital video stream into a set of individual decoded video frames; and

writing the set of individual decoded video frames to the thin client screen buffer associated with the remote display system.

6. A system comprising:

one or more processors; and

a memory storing instructions that, when executed by at least one processor among the processors, causes the system to perform operations comprising:

initiating a thin-client terminal session with a server system and the remote display system;

requesting graphics capabilities of the remote display system, wherein the graphics capabilities of the remote display system include a resolution, a color bit depth, and a video decoder format;