Process, apparatus and system for encoding and decoding video signals using temporal filtering

Claim 2

A computer-implemented process for decoding video signals, comprising the step of: (a) decoding a first portion of an encoded bitstream corresponding to a plurality of video frames to generate a first decoded video frame; (b) decoding a second portion of the encoded bitstream to generate a second decoded video frame; and (c) applying a temporal filter to the first decoded video frame and the second decoded video frame to generate a filtered second video frame.

Claim 3

The process of claim 1, comprising the further steps of: (d) decoding a third portion of the encoded bitstream to generate a third decoded video frame, wherein the filtered second video frame is used as a reference frame for generating the third decoded video frame; and (e) applying the temporal filter to the filtered second video frame and the third decoded video frame to generate a filtered third video frame.

Claim 4

The process of claim 2, wherein: for each video frame of the plurality of video frames, the encoded bitstream comprises encoded Y-component plane signals, encoded U-component plane signals, and encoded V-component plane signals; step (a) comprises the steps of: (1) decoding the encoded Y-component plane signals of the first portion to generate decoded Y-component plane signals corresponding to the first decoded video frame; (2) decoding the encoded U-component plane signals of the first portion to generate decoded U-component plane signals corresponding to the first decoded video frame; and (3) decoding the encoded V-component plane signals of the first portion to generate decoded V-component plane signals corresponding to the first decoded video frame; step (b) comprises the steps of: (1) decoding the encoded Y-component plane signals of the second portion to generate decoded Y-component plane signals corresponding to the second decoded video frame; (2) decoding the encoded U-component plane signals of the second portion to generate decoded U-component plane signals corresponding to the second decoded video frame; and (3) decoding the encoded V-component plane signals of the second portion to generate decoded V-component plane signals corresponding to the second decoded video frame; and step (c) comprises the step of applying the temporal filter only to the decoded Y-component plane signals of the first decoded video frame and the decoded Y-component plane signals of the second decoded video frame to generate the filtered second video frame.

Claim 5

The process of claim 3, wherein: the first decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the first portion; the second decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the second portion; and step (c) comprises the step of applying the temporal filter only to the inter-encoded regions of the decoded Y-component plane signals of the first decoded video frame and the inter-encoded regions of the decoded Y-component plane signals of the second decoded video frame to generate the filtered second video frame.

Claim 6

The process of claim 4, wherein: the encoded bitstream comprises a temporal filter strength signal; and step (c) comprises the step of applying the temporal filter in accordance with the temporal filter strength signal.

Claim 7

The process of claim 5, wherein the temporal filter is defined as: c'={c+(p-c+(1<<s))}>>(s+1) wherein: c is a Y component signal of the second decoded video frame; p is a corresponding non-motion-compensated Y component signal of the first decoded video frame; s is an integer parameter corresponding to the temporal filter strength signal; and c' is a Y component signal of the filtered second video frame.

Claim 8

The process of claim 1, wherein: for each video frame of the plurality of video frames, the encoded bitstream comprises encoded Y-component plane signals, encoded U-component plane signals, and encoded V-component plane signals; step (a) comprises the steps of: (1) decoding the encoded Y-component plane signals of the first portion to generate decoded Y-component plane signals corresponding to the first decoded video frame; (2) decoding the encoded U-component plane signals of the first portion to generate decoded U-component plane signals corresponding to the first decoded video frame; and (3) decoding the encoded V-component plane signals of the first portion to generate decoded V-component plane signals corresponding to the first decoded video frame; step (b) comprises the steps of: (1) decoding the encoded Y-component plane signals of the second portion to generate decoded Y-component plane signals corresponding to the second decoded video frame; (2) decoding the encoded U-component plane signals of the second portion to generate decoded U-component plane signals corresponding to the second decoded video frame; and (3) decoding the encoded V-component plane signals of the second portion to generate decoded V-component plane signals corresponding to the second decoded video frame; and step (c) comprises the step of applying the temporal filter only to the decoded Y-component plane signals of the first decoded video frame and the decoded Y-component plane signals of the second decoded video frame to generate the filtered second video frame.

Claim 9

The process of claim 1, wherein: the first decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the first portion; the second decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the second portion; and step (c) comprises the step of applying the temporal filter only to the inter-encoded regions of the first decoded video frame and the inter-encoded regions of the second decoded video frame to generate the filtered second video frame.

Claim 10

The process of claim 1, wherein: the encoded bitstream comprises a temporal filter strength signal; and step (c) comprises the step of applying the temporal filter in accordance with the temporal filter strength signal.

Claim 11

The process of claim 9, wherein the temporal filter is defined as: c'={c+(p-c+(1<<s))}>>(s+1) wherein: c is a component signal of the second decoded video frame; p is a corresponding non-motion-compensated component signal of the first decoded video frame; s is an integer parameter corresponding to the temporal filter strength signal; and c' is a component signal of the filtered second video frame.

Claim 14

The apparatus of claim 11, wherein: means (a) decodes a third portion of the encoded bitstream to generate a third decoded video frame, wherein the filtered second video frame is used as a reference frame for generating the third decoded video frame; and means (b) applies the temporal filter to the filtered second video frame and the third decoded video frame to generate a filtered third video frame.

Claim 15

The apparatus of claim 12, wherein: for each video frame of the plurality of video frames, the encoded bitstream comprises encoded Y-component plane signals, encoded U-component plane signals, and encoded V-component plane signals; means (a) comprises means for: (1) decoding the encoded Y-component plane signals of the first portion to generate decoded Y-component plane signals corresponding to the first decoded video frame; (2) decoding the encoded U-component plane signals of the first portion to generate decoded U-component plane signals corresponding to the first decoded video frame; and (3) decoding the encoded V-component plane signals of the first portion to generate decoded V-component plane signals corresponding to the first decoded video frame; (4) decoding the encoded Y-component plane signals of the second portion to generate decoded Y-component plane signals corresponding to the second decoded video frame; (5) decoding the encoded U-component plane signals of the second portion to generate decoded U-component plane signals corresponding to the second decoded video frame; and (6) decoding the encoded V-component plane signals of the second portion to generate decoded V-component plane signals corresponding to the second decoded video frame; and means (b) comprises means for applying the temporal filter only to the decoded Y-component plane signals of the first decoded video frame and the decoded Y-component plane signals of the second decoded video frame to generate the filtered second video frame.

Claim 16

The apparatus of claim 13, wherein: the first decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the first portion; the second decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the second portion; and step (b) comprises means for applying the temporal filter only to the inter-encoded regions of the decoded Y-component plane signals of the first decoded video frame and the inter-encoded regions of the decoded Y-component plane signals of the second decoded video frame to generate the filtered second video frame.

Claim 17

The apparatus of claim 14, wherein: the encoded bitstream comprises a temporal filter strength signal; and means (b) comprises means for applying the temporal filter in accordance with the temporal filter strength signal.

Claim 18

The apparatus of claim 15, wherein the temporal filter is defined as: c'={c+(p-c+(1<<s))}>>(s+1) wherein: c is a Y component signal of the second decoded video frame; p is a corresponding non-motion-compensated Y component signal of the first decoded video frame; s is an integer parameter corresponding to the temporal filter strength signal; and c' is a Y component signal of the filtered second video frame.

Claim 19

The apparatus of claim 11, wherein: for each video frame of the plurality of video frames, the encoded bitstream comprises encoded Y-component plane signals, encoded U-component plane signals, and encoded V-component plane signals; means (a) comprises means for: (1) decoding the encoded Y-component plane signals of the first portion to generate decoded Y-component plane signals corresponding to the first decoded video frame; (2) decoding the encoded U-component plane signals of the first portion to generate decoded U-component plane signals corresponding to the first decoded video frame; and (3) decoding the encoded V-component plane signals of the first portion to generate decoded V-component plane signals corresponding to the first decoded video frame; (4) decoding the encoded Y-component plane signals of the second portion to generate decoded Y-component plane signals corresponding to the second decoded video frame; (5) decoding the encoded U-component plane signals of the second portion to generate decoded U-component plane signals corresponding to the second decoded video frame; and (6) decoding the encoded V-component plane signals of the second portion to generate decoded V-component plane signals corresponding to the second decoded video frame; and means (b) comprises means for applying the temporal filter only to the decoded Y-component plane signals of the first decoded video frame and the decoded Y-component plane signals of the second decoded video frame to generate the filtered second video frame.

Claim 20

The apparatus of claim 11, wherein: the first decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the first portion; the second decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the second portion; and means (b) comprises means for applying the temporal filter only to the inter-encoded regions of the first decoded video frame and the inter-encoded regions of the second decoded video frame to generate the filtered second video frame.

Claim 21

The apparatus of claim 11, wherein: the encoded bitstream comprises a temporal filter strength signal; and means (b) comprises means for applying the temporal filter in accordance with the temporal filter strength signal.

Claim 22

The apparatus of claim 19, wherein the temporal filter is defined as: c'={c+(p-c+(1<<s))}>>(s+1) wherein: c is a component signal of the second decoded video frame; p is a corresponding non-motion-compensated component signal of the first decoded video frame; s is an integer parameter corresponding to the temporal filter strength signal; and c' is a component signal of the filtered second video frame.

Claim 23

The apparatus of claim 11, wherein the apparatus comprises a pixel processor.

Claim 24

The apparatus of claim 11, wherein the apparatus comprises a host processor.

Claim 27

The system of claim 23, wherein the conferencing system: decodes a third portion of the encoded bitstream to generate a third decoded video frame wherein the filtered second video frame is used as a reference frame for generating the third decoded video frame; and applies the temporal filter to the filtered second video frame and the third decoded video frame to generate a filtered third video frame.

Claim 28

The system of claim 24, wherein: for each video frame of the plurality of video frames, the encoded bitstream comprises encoded Y-component plane signals, encoded U-component plane signals, and encoded V-component plane signals; and the conferencing system: decodes the encoded Y-component plane signals of the first portion to generate decoded Y-component plane signals corresponding to the first decoded video frame; decodes the encoded U-component plane signals of the first portion to generate decoded U-component plane signals corresponding to the first decoded video frame; and decodes the encoded V-component plane signals of the first portion to generate decoded V-component plane signals corresponding to the first decoded video frame; decodes the encoded Y-component plane signals of the second portion to generate decoded Y-component plane signals corresponding to the second decoded video frame; decodes the encoded U-component plane signals of the second portion to generate decoded U-component plane signals corresponding to the second decoded video frame; decodes the encoded V-component plane signals of the second portion to generate decoded V-component plane signals corresponding to the second decoded video frame; and applies the temporal filter only to the decoded Y-component plane signals of the first decoded video frame and the decoded Y-component plane signals of the second decoded video frame to generate the filtered second video frame.

Claim 29

The system of claim 25, wherein: the first decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the first portion; the second decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the second portion; and the conferencing system applies the temporal filter only to the inter-encoded regions of the decoded Y-component plane signals of the first decoded video frame and the inter-encoded regions of the decoded Y-component plane signals of the second decoded video frame to generate the filtered second video frame.

Claim 30

The system of claim 26, wherein: the encoded bitstream comprises a temporal filter strength signal; and the conferencing system applies the temporal filter in accordance with the temporal filter strength signal.

Claim 31

The system of claim 27, wherein the temporal filter is defined as: c'={c+(p-c+(1<<s))}>>(s+1) wherein: c is a Y component signal of the second decoded video frame; p is a corresponding non-motion-compensated Y component signal of the first decoded video frame; s is an integer parameter corresponding to the temporal filter strength signal; and c' is a Y component signal of the filtered second video frame.

Claim 32

The system of claim 23, wherein: for each video frame of the plurality of video frames, the encoded bitstream comprises encoded Y-component plane signals, encoded U-component plane signals, and encoded V-component plane signals; and the conferencing system: decodes the encoded Y-component plane signals of the first portion to generate decoded Y-component plane signals corresponding to the first decoded video frame; decodes the encoded U-component plane signals of the first portion to generate decoded U-component plane signals corresponding to the first decoded video frame; and decodes the encoded V-component plane signals of the first portion to generate decoded V-component plane signals corresponding to the first decoded video frame; decodes the encoded Y-component plane signals of the second portion to generate decoded Y-component plane signals corresponding to the second decoded video frame; decodes the encoded U-component plane signals of the second portion to generate decoded U-component plane signals corresponding to the second decoded video frame; decodes the encoded V-component plane signals of the second portion to generate decoded V-component plane signals corresponding to the second decoded video frame; and applies the temporal filter only to the decoded Y-component plane signals of the first decoded video frame and the decoded Y-component plane signals of the second decoded video frame to generate the filtered second video frame.

Claim 33

The system of claim 23, wherein: the first decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the first portion; the second decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the second portion; and the conferencing system applies the temporal filter only to the inter-encoded regions of the first decoded video frame and the inter-encoded regions of the second decoded video frame to generate the filtered second video frame.

Claim 34

The system of claim 23, wherein: the encoded bitstream comprises a temporal filter strength signal; and the conferencing system applies the temporal filter in accordance with the temporal filter strength signal.

Claim 35

The system of claim 31, wherein the temporal filter is defined as: c'={c+(p-c+(1<<s))}>>(s+1) wherein: c is a component signal of the second decoded video frame; p is a corresponding non-motion-compensated component signal of the first decoded video frame; s is an integer parameter corresponding to the temporal filter strength signal; and c' is a component signal of the filtered second video frame.

Claim 36

The system of claim 23, wherein the conferencing system comprises a host processor for decoding the encoded bitstream and for applying the temporal filter to generate the filtered second video frame.

Claim 37

A computer-implemented process for encoding video signals, comprising the step of: (a) encoding a first unencoded video frame to generate a first encoded video frame; (b) decoding the first encoded video frame to generate a first decoded video frame; (c) encoding a second unencoded video frame to generate a second encoded video frame; (d) decoding the second encoded video frame to generate a second decoded video frame; (e) applying a temporal filter to the first decoded video frame and the second decoded video frame to generate a filtered second video frame; (f) encoding a third unencoded video frame to generate a third encoded video frame; (g) decoding the third encoded video frame to generate a third decoded video frame, wherein the filtered second video frame is used as a reference frame for generating the third decoded video frame; and (h) applying the temporal filter to the filtered second video frame and the third decoded video frame to generate a filtered third video frame.

Claim 38

A computer-implemented process for encoding video signals, comprising the step of: (a) encoding a first unencoded video frame to generate a first encoded video frame; (b) decoding the first encoded video frame to generate a first decoded video frame; (c) encoding a second unencoded video frame to generate a second encoded video frame; (d) decoding the second encoded video frame to generate a second decoded video frame; (e) applying a temporal filter to the first decoded video frame and the second decoded video frame to generate a filtered second video frame; (f) encoding a third unencoded video frame to generate a third encoded video frame; (g) decoding the third encoded video frame to generate a third decoded video frame, wherein the filtered second video frame is used as a reference frame for generating the third decoded video frame; and (h) applying the temporal filter to the filtered second video frame and the third decoded video frame to generate a filtered third video frame.

Claim 39

The process of claim 34, wherein: step (a) comprises the step of applying a temporal pre-filter to generate the first encoded video frame; step (c) comprises the step of applying the temporal pre-filter to generate the second encoded video frame; and step (f) comprises the step of applying the temporal pre-filter to generate the second encoded video frame.

Claim 40

The process of claim 34, wherein: each video frame of the plurality of video frames comprises a Y-component plane, a U-component plane, and a V-component plane; step (b) comprises the steps of: (1) generating decoded Y-component plane signals corresponding to the first decoded video frame; (2) generating decoded U-component plane signals corresponding to the first decoded video frame; and (3) generating decoded V-component plane signals corresponding to the first decoded video frame; step (d) comprises the steps of: (1) generating decoded Y-component plane signals corresponding to the second decoded video frame; (2) generating decoded U-component plane signals corresponding to the second decoded video frame; and (3) generating decoded V-component plane signals corresponding to the second decoded video frame; and step (e) comprises the step of applying the temporal filter only to the decoded Y-component plane signals of the first decoded video frame and the decoded Y-component plane signals of the second decoded video frame to generate the filtered second video frame.

Claim 41

The process of claim 36, wherein: the first decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the first encoded video frame; the second decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the second encoded video frame; and step (e) comprises the step of applying the temporal filter only to the inter-encoded regions of the decoded Y-component plane signals of the first decoded video frame and the inter-encoded regions of the decoded Y-component plane signals of the second decoded video frame to generate the filtered second video frame.

Claim 42

The process of claim 37, wherein: the second encoded video frame comprises a temporal filter strength signal; and step (e) comprises the step of applying the temporal filter in accordance with the temporal filter strength signal.

Claim 43

The process of claim 38, wherein the temporal filter is defined as: c'={c+(p-c+(1<<s))}>>(s+1) wherein: c is a Y component signal of the second decoded video frame; p is a corresponding non-motion-compensated Y component signal of the first decoded video frame; s is an integer parameter corresponding to the temporal filter strength signal; and c' is a Y component signal of the filtered second video frame.

Claim 44

The process of claim 34, wherein: the first decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the first portion; the second decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the second portion; and step (e) comprises the step of applying the temporal filter only to the inter-encoded regions of the first decoded video frame and the inter-encoded regions of the second decoded video frame to generate the filtered second video frame.

Claim 45

The process of claim 34, wherein: the second encoded video frame comprises a temporal filter strength signal; and step (e) comprises the step of applying the temporal filter in accordance with the temporal filter strength signal.

Claim 46

The process of claim 41, wherein the temporal filter is defined as: c'={c+(p-c+(1<<s))}>>(s+1) wherein: c is a component signal of the second decoded video frame; p is a corresponding non-motion-compensated component signal of the first decoded video frame; s is an integer parameter corresponding to the temporal filter strength signal; and c' is a component signal of the filtered second video frame.

Claim 49

The apparatus of claim 43, wherein means (a) comprises means for: applying a temporal pre-filter to generate the first encoded video frame; applying the temporal pre-filter to generate the second encoded video frame; and applying the temporal pre-filter to generate the second encoded video frame.

Claim 50

The apparatus of claim 43, wherein: each video frame of the plurality of video frames comprises a Y-component plane, a U-component plane, and a V-component plane; means (b) comprises means for: (1) generating decoded Y-component plane signals corresponding to the first decoded video frame; (2) generating decoded U-component plane signals corresponding to the first decoded video frame; (3) generating decoded V-component plane signals corresponding to the first decoded video frame; (4) generating decoded Y-component plane signals corresponding to the second decoded video frame; (5) generating decoded U-component plane signals corresponding to the second decoded video frame; and (6) generating decoded V-component plane signals corresponding to the second decoded video frame; and means (c) comprises means for applying the temporal filter only to the decoded Y-component plane signals of the first decoded video frame and the decoded Y-component plane signals of the second decoded video frame to generate the filtered second video frame.

Claim 51

The apparatus of claim 45, wherein: the first decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the first encoded video frame; the second decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the second encoded video frame; and means (c) comprises means for applying the temporal filter only to the inter-encoded regions of the decoded Y-component plane signals of the first decoded video frame and the inter-encoded regions of the decoded Y-component plane signals of the second decoded video frame to generate the filtered second video frame.

Claim 52

The apparatus of claim 46, wherein: the second encoded video frame comprises a temporal filter strength signal; and means (c) comprises means for applying the temporal filter in accordance with the temporal filter strength signal.

Claim 53

The apparatus of claim 47, wherein the temporal filter is defined as: c'={c+(p-c+(1<<s))}>>(s+1) wherein: c is a Y component signal of the second decoded video frame; p is a corresponding non-motion-compensated Y component signal of the first decoded video frame; s is an integer parameter corresponding to the temporal filter strength signal; and c' is a Y component signal of the filtered second video frame.

Claim 54

The apparatus of claim 43, wherein: the first decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the first portion; the second decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the second portion; and means (c) comprises means for applying the temporal filter only to the inter-encoded regions of the first decoded video frame and the inter-encoded regions of the second decoded video frame to generate the filtered second video frame.

Claim 55

The apparatus of claim 43, wherein: the second encoded video frame comprises a temporal filter strength signal; and means (c) comprises means for applying the temporal filter in accordance with the temporal filter strength signal.

Claim 56

The apparatus of claim 50, wherein the temporal filter is defined as: c'={c+(p-c+(1<<s))}>>(s+1) wherein: c is a component signal of the second decoded video frame; p is a corresponding non-motion-compensated component signal of the first decoded video frame; s is an integer parameter corresponding to the temporal filter strength signal; and c' is a component signal of the filtered second video frame.

Claim 57

The apparatus of claim 43, wherein the apparatus comprises a pixel processor.

Claim 58

The apparatus of claim 43, wherein the apparatus comprises a host processor.

Claim 61

The system of claim 54, wherein the conferencing system: applies a temporal pre-filter to generate the first encoded video frame; applies the temporal pre-filter to generate the second encoded video frame; and applies the temporal pre-filter to generate the second encoded video frame.

Claim 62

The system of claim 54, wherein: each video frame of the plurality of video frames comprises a Y-component plane, a U-component plane, and a V-component plane; the conferencing system: generates decoded Y-component plane signals corresponding to the first decoded video frame; generates decoded U-component plane signals corresponding to the first decoded video frame; and generates decoded V-component plane signals corresponding to the first decoded video frame; generates decoded Y-component plane signals corresponding to the second decoded video frame; generates decoded U-component plane signals corresponding to the second decoded video frame; generates decoded V-component plane signals corresponding to the second decoded video frame; and applies the temporal filter only to the decoded Y-component plane signals of the first decoded video frame and the decoded Y-component plane signals of the second decoded video frame to generate the filtered second video frame.

Claim 63

The system of claim 56, wherein: the first decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the first encoded video frame; the second decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the second encoded video frame; and the conferencing system applies the temporal filter only to the inter-encoded regions of the decoded Y-component plane signals of the first decoded video frame and the inter-encoded regions of the decoded Y-component plane signals of the second decoded video frame to generate the filtered second video frame.

Claim 64

The system of claim 57, wherein: the second encoded video frame comprises a temporal filter strength signal; and the conferencing system applies the temporal filter in accordance with the temporal filter strength signal.

Claim 65

The system of claim 58, wherein the temporal filter is defined as: c'={c+(p-c+(1<<s))}>>(s+1) wherein: c is a Y component signal of the second decoded video frame; p is a corresponding non-motion-compensated Y component signal of the first decoded video frame; s is an integer parameter corresponding to the temporal filter strength signal; and c' is a Y component signal of the filtered second video frame.

Claim 66

The system of claim 54, wherein: the first decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the first portion; the second decoded video frame corresponds to one or more inter-encoded regions and one or more intra-encoded regions of the second portion; and the conferencing system applies the temporal filter only to the inter-encoded regions of the first decoded video frame and the inter-encoded regions of the second decoded video frame to generate the filtered second video frame.

Claim 67

The system of claim 54, wherein: the second encoded video frame comprises a temporal filter strength signal; and the conferencing system applies the temporal filter in accordance with the temporal filter strength signal.

Claim 68

The system of claim 61, wherein the temporal filter is defined as: c'={c+(p-c+(1<<s))}>>(s+1) wherein: c is a component signal of the second decoded video frame; p is a corresponding non-motion-compensated component signal of the first decoded video frame; s is an integer parameter corresponding to the temporal filter strength signal; and c' is a component signal of the filtered second video frame.

Claim 69

The system of claim 54, wherein the conferencing system comprises: (1) a host processor; and (2) a video board, wherein: the video board receives the unencoded video frames from the video source and generates the first encoded video frame, the second encoded video frame, the third encoded video frame; and the host processor controls the operations of the video board.

Claim 70

The system of claim 63, wherein the video board generates the first decoded video frame, the second decoded video frame, and the third decoded video frame.

Claim 71

The system of claim 63, wherein the host processor generates the first decoded video frame, the second decoded video frame, and the third decoded video frame.

Claim 72

The system of claim 63, wherein the video board comprises: a video analog-to-digital converter for receiving unencoded analog video signals from the video source and for generating unencoded digital video signals; a video capture module for capturing the unencoded digital video signals and generating unencoded captured video signals; a memory device for storing the unencoded captured video signals; a pixel processor for generating the first encoded video frame from the unencoded captured video signals and storing the first encoded video frame in the memory device; and a bus interface for transmitting the first encoded video frame to the host processor.