Intra-refresh for video streaming

A computing device comprising:

• processing hardware configured to generated video frames;
• a framebuffer configured to store the generated video frames;
• a multiplexer;
• and
• a hardware encoder coupled with the processing hardware and configured to encode the video frames which are then formed into a video stream by the multiplexer for transmission, wherein the computing device is configured to respond to a request to refresh the video stream by encoding a sequence of intra-refresh frames, wherein the intra-refresh frames together are capable of being decoded to produce a complete frame of the video stream.

A method performed by a computing device comprising:

• encoding video frames as a sequence of at least an Iframe and a chain of Pframes;
• transmitting the encoded video frames via a communication interface of the computing device;
• determining that a transmitted frame was not able to be decoded, and in response encoding first, second, and third intra-refresh frames, in order respectively, wherein each intra-refresh frame comprises a first, second, and third slice,
• wherein the first intra-refresh frame comprises a first Islice as its first slice,
• wherein the second intra-refresh frame comprises a first Pslice as its first slice and a second Islice as its second slice, and wherein first Pslice was encoded based only on the first Islice, and
• wherein the third intra-refresh frame comprises a second Pslice as its first slice, a third Pslice as its second slice, and a second Islice as its third slice, wherein the second and third Pslices are encoded based only on the second Islice and the first Pslice.