Cisco Technology, Inc.

Guang Xu

Zhiliang Wang

Yongze Xu

Ling Zhang

Qi Zhang

Dong Zhang

Hongjuan Wang

Ling Zhu

Bin Zhu

Wayne Liu

Techniques are presented herein for switching between a software decoder and a hardware decoder in a hybrid decoder. A video bit stream is received. The video bit stream is analyzed to determine whether or not the video bit stream can be decoded by the hardware decoder. When the video bit stream can be decoded by the hardware decoder, the video bit stream is routed to the hardware decoder and also stored in a first buffer. The video bit stream is decoded by the hardware decoder and when a reference frame is decoded, the reference frame is stored in a second buffer. When the video bit stream cannot be decoded by the hardware decoder, the video bit stream is routed to the software decoder for decoding. When an instantaneous decoder refresh (IDR) frame is decoded by the software decoder, the IDR frame is stored in the first buffer.

Fast switching hybrid video decoder

In one implementation, a network device receives a series of video frames spanning a series time period from a network. The time period may be static of a specific duration or identified dynamically based on the timing of the video frames. The network device decodes the series of video frames and stores the decoded series of data frames in memory along with associated timestamps. A pause phenomenon in excess of expected delay is identified between two of the decoded video frames. The network device forwards or displays the series of decoded frames such that each successive pair of frames in the series of decoded frames are spaced by a resultant delay period that is less than a duration of the pause phenomenon.

Delay tolerant decoder

In one embodiment a method includes connecting a primary video conference client device (PVCCD) to a video conference session; allocating: at least a first presentation segment of the video conference session to be presented by the PVCCD, and also allocating at least a second presentation segment of the video conference session to be presented by at least one secondary video conference client device (SVCCD), receiving a data stream associated with at least the first presentation segment, and presenting the first presentation segment on the PVCCD.

Multi-device conference participation

In one embodiment, video is transmitted between a sending device and a receiving device. The sending device is configured to receive adjacent camera views and encode the adjacent camera views independently into video streams. The sending device performs an image analysis on the adjacent camera views in order to generate a projection matrix to relate the adjacent camera views. The projection matrix and the encoded video streams are sent to at least one receiver. The receiver is configured to receive the encoded video streams and the projection matrix relating the encoded video streams. The receiver calculates an aggregate video stream using the projection matrix. The aggregate video stream includes portions of at least two of the encoded video streams. Other receivers may receive the same encoded video streams and generate a different aggregate video stream having a varying size, resolution, or number of views.

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Hefei, China

Guang Xu