Method, a video encoder, and a video camera for encoding a video stream

A video encoder, comprising:

• a receiver configured to receive a frame of a video stream to be encoded;
• a motion detector configured to perform motion detection in the frame to identifying steady regions, wherein the steady regions are regions in the frame where no motion is detected;
• a temporal filter configured to temporally filter the frame so as to provide a temporally filtered pixel value for each pixel in the frame;
• and
• an encoder configured to:
• for each pixel that is not in the steady regions of the frame, use the temporally filtered pixel value as input value when encoding the pixel, and
• for each pixel in the steady regions of the frame, use the temporally filtered pixel value as input value when encoding the pixel on a condition that the pixel belongs to a block of pixels of the frame that will be intra-coded by the encoder, and to use as input value when encoding the pixel a value that was used as input value when encoding a corresponding pixel of an immediately preceding frame on a condition that the pixel belongs to a block of pixels of the frame that will be inter-coded by the encoder.

A video camera comprising a video encoder, the video encoder comprising:

• a receiver configured to receive a frame of a video stream to be encoded;
• a motion detector configured to perform motion detection in the frame to identifying steady regions, wherein the steady regions are regions in the frame where no motion is detected;
• a temporal filter configured to temporally filter the frame so as to provide a temporally filtered pixel value for each pixel in the frame;
• and
• an encoder configured to:
• for each pixel that is not in the steady regions of the frame, use the temporally filtered pixel value as input value when encoding the pixel, and
• for each pixel in the steady regions of the frame, use the temporally filtered pixel value as input value when encoding the pixel on a condition that the pixel belongs to a block of pixels of the frame that will be intra-coded by the encoder, and to use as input value when encoding the pixel a value that was used as input value when encoding a corresponding pixel of an immediately preceding frame on a condition that the pixel belongs to a block of pixels of the frame that will be inter-coded by the encoder.

A non-transitory computer-readable medium having instructions stored thereon for encoding a video stream, execution of which by a computing device causes the computing device to perform operations comprising:

• receiving a frame of a video stream to be encoded;
• performing motion detection in the frame to identifying steady regions, wherein the steady regions are regions in the frame where no motion is detected;
• temporally filtering the frame so as to provide a temporally filtered pixel value for each pixel in the frame;
• for each pixel that is not in the steady regions of the frame:
• using the temporally filtered pixel value as input value when encoding the pixel;
• and
• for each pixel in the steady regions of the frame:
• on a condition that the pixel belongs to a block of pixels of the frame that will be intra-coded, using the temporally filtered pixel value as input value when encoding the pixel, and
• on a condition that the pixel belongs to a block of pixels of the frame that will be inter-coded, using, as input value when encoding the pixel, a value that was used as input value when encoding a corresponding pixel of an immediately preceding frame.