Network video method

• US 20060130104A1
• Filed: 06/29/2001
• Published: 06/15/2006
• Est. Priority Date: 06/28/2000
• Status: Abandoned Application

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Budagavi, Madhukar
• Application Number:
  US09/896,386
• Publication Number:
  US 20060130104A1
• Time in Patent Office: Days
• US Class Current: 725/105
• CPC Class Codes: H04N 19/107 between spatial and temporal predictive coding, e.g. picture refresh
• CPC Class Codes: H04N 19/166 concerning the amount of transmission errors, e.g. bit error rate [BER]
• CPC Class Codes: H04N 19/172 the region being a picture, frame or field
• CPC Class Codes: H04N 19/188 the unit being a video data packet, e.g. a network abstraction layer [NAL] unit
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 19/895 in combination with error concealment
• CPC Class Codes: H04N 21/2402 Monitoring of the downstream path of the transmission network, e.g. bandwidth available traffic monitoring in data switching networks H04L43/00; monitoring data switching networks utilization H04L43/0876
• CPC Class Codes: H04N 21/6125 involving transmission via Internet transmission by internet of broadcast information H04H60/82

Abstract

Motion compensation of real-time video for transmission over a packetized network is controlled by maximization of the probability of correct frame reconstruction according to a Markov model of packet transmission losses. The control determines a tradeoff of the intra-coded frame rate with a repeated predictively-coded frame rate.

Claims

1. A method for motion compensation video, comprising:

(a) assessing parameters of a packetized transmission channel;

(b) assessing sizes of intra-coded frames and predictively-coded frames for an input video;

(c) setting the rate of intra-coded frames and the rate of predictively-coded frames by maximizing a probability of correct frame reconstruction using the results of steps (a) and (b), wherein said probability of correct frame reconstruction includes a rate of repeated transmission of predictively-coded frames.

2. The method of claim 1, wherein:

(a) said transmission channel is the Internet; and

(b) said predictively-coded frames are P-frames.

3. The method of claim 1, wherein:

(a) said parameters of step (a) of claim 1 include the packet loss rate over said transmission channel.

4. The method of claim 3, wherein:

(a) said probability is taken as q₀(1−

p_e0)/(q₀+q₁p_e1) where q₀ is the probability of an intra-coded frame, q₁ is the probability of a predictively-coded frame, p_e0 is the probability of a transmitted intra-coded frame being lost, and p_e1 is the probability of a transmitted predictively-coded frame being lost.

5. A motion compensation controller for video, comprising:

(a) a first input for channel parameters of a packetized transmission channel;

(b) a second input for video parameters; and

(c) a probability maximizer coupled to said first and second inputs and with an output of an intra-coded frame transmission rate over said channel, a predictively-coded frame transmission rate over said channel, and a repetition rate for transmission of said predictively-coded frames over said channel;

said probability maximizer maximizes a probability of correct frame reconstruction using said first and second inputs wherein said probability of correct frame reconstruction includes a rate of repeated transmission of predictively-coded frames.