Encoding and decoding video data

A computer-implemented method of decoding streamed video data, the method comprising:

• receiving a bitstream comprising:
• frames of encoded video data comprising a first frame;
• and
• a header of a frame or packet comprising metadata identifying a portion of an image that is larger in at least one dimension than the first frame,
• wherein the portion of the image has similarity to at least a portion of the first frame, and
• the similarity is identified by at least one of color matching, structural similarity, Structural Similarity Index (SSIM), peak signal-to-noise ratio (PSNR), and color average;
• accessing a dataset comprising at least one image expected to have similarity to at least one of the frames of the encoded video data to obtain the image;
• generating a frame containing the portion of the image, by encoding the generated frame using a same encoding method used to encode the encoded video data in the bitstream, to generate an encoded generated frame;
• adding data corresponding to the encoded generated frame to the bitstream, by prepending the data corresponding to the encoded generated frame to the bitstream, to produce a modified bitstream,
• wherein the data corresponding to the encoded generated frame is encoded as a key frame of the encoded video data;
• decoding the modified bitstream to produce decoded video data;
• and
• discarding data corresponding to the generated frame from the decoded video data.

A non-transitory computer-readable storage medium, having a computer program stored thereon that performs, when executed by at least one processor:

• receiving a bitstream comprising:
• frames of encoded video data comprising a first frame;
• and
• a header of a frame or packet comprising metadata identifying a portion of an image that is larger in at least one dimension than the first frame,
• wherein the portion of the image has similarity to at least a portion of the first frame, and
• the similarity is identified by at least one of color matching, structural similarity, Structural Similarity Index (SSIM), peak signal-to-noise ratio (PSNR), and color average;
• accessing a dataset comprising at least one image expected to have similarity to at least one of the frames of the encoded video data to obtain the image;
• generating a frame containing the image or the portion of the image, by encoding the generated frame using a same encoding method used to encode the encoded video data in the bitstream, to generate an encoded generated frame;
• adding data corresponding to the encoded generated frame to the bitstream, by prepending the data corresponding to the encoded generated frame to the bitstream to produce a modified bitstream,
• wherein the data corresponding to the encoded generated frame is encoded as a key frame of the encoded video data;
• decoding the modified bitstream to produce decoded video data;
• and
• discarding data corresponding to the generated frame from the decoded video data.