Wireless communication system for video packet transmission

• US 6,744,738 B1
• Filed: 06/12/2000
• Issued: 06/01/2004
• Est. Priority Date: 06/12/1999
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Yung-lyul, Park, Jong-hoon, Park, Dong-seek
• Primary Examiner(s): Jung, Min
• Application Number:
  US09/592,577
• Time in Patent Office: 1,450 Days
• Field of Search: 370/349, 370/252, 370/474, 370/475, 370/476, 370/477, 370/485, 370/486, 348/384.1
• US Class Current: 370/252
• CPC Class Codes: H04N 21/234327 by decomposing into layers, e.g. base layer and one or more enhancement layers
• 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 21/2662 Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
• CPC Class Codes: H04N 21/6131 involving transmission via a mobile phone network wireless downlink channel access H04W74/006
• CPC Class Codes: H04N 21/64792 Controlling the complexity of the content stream, e.g. by dropping packets intermediate media network packet handling H04L65/765; proxy provisioning conversion or adaptation for reducing the amount or size of exchanged application data H04L67/5651; negotiation of resources in wireless networks H04W28/16

Abstract

A wireless communication system for video packet transmission is provided. The wireless transmission system includes a video encoder for encoding a video signal on a block-by-block basis, and a degree of importance determiner for determining the degree of importance of video data encoded in each block from predetermined parameters. The wireless transmission system also includes a data transmission determiner for determining the transmission priority, or whether to transmit the encoded video data, on the basis of at least the amount of encoded video data to be transmitted per unit time the wireless channel conditions, and the degree of importance of the encoded video data. Furthermore, the wireless transmission system includes a video data packetizing unit for packetizing the video data determined to be transmitted, and a wireless transmitter for wirelessly transmitting packetized data. It is possible to transmit the video data with the amount of the data controlled for the fixed bandwidth of the wireless channel by determining the transmission priority or whether to transmit the video data, by considering the degree of importance of the currently encoded video is data. Therefore, when the bandwidth of the allowed channel is small and the amount of data to be transmitted per unit time is large, it is possible to transmit the video data faster since the video data is not buffered unlike in the conventional technology.

Claims

1. A wireless transmission system for transmitting a video packet through a wireless channel, comprising:

a video encoder operable to encode a video signal on a block-by-block basis;

a degree of importance determiner operable to determine the degree of importance of video data encoded in each block based on predetermined parameters;

a data transmission determiner operable to determine a transmission priority based on the degree of importance and on at least one of an amount of encoded video data to be transmitted per unit time and wireless channel conditions, or operable to determine whether to prevent transmission of the encoded video data based on the degree of importance of the encoded video data and on at least one of the amount of encoded video data to be transmitted per unit time and the wireless channel conditions;

a video data packetizing unit operable to packetize the video data determined to be transmitted; and

a wireless transmitter operable to wirelessly transmit packetized video data.

2. The wireless transmission system of claim 1, wherein the degree of importance determiner determines the degree of importance of the video data by putting weight values on the predetermined parameters, which include whether the video data is intra encoded or inter encoded, a motion vector value of the encoded video data, or whether the encoded video data falls on edge values.

3. A wireless transmission system for transmitting a video packet through a wireless channel, comprising:

a video encoder operable to encode a video signal on a block-by-block basis;

a degree of importance determiner operable to determine the degree of importance of video data encoded in each block based on predetermined parameters;

a data transmission determiner operable to determine a transmission priority based on the degree of importance and on at least one of an amount of encoded video data to be transmitted per unit time and wireless channel conditions, or operable to determine whether to prevent transmission of the encoded video data based on the degree of importance of the encoded video data and on at least one of the amount of encoded video data to be transmitted per unit time and the wireless channel conditions;

a video and degree of importance data packetizing unit operable to packetize the video data determined to be transmitted and operable to insert an information field which shows the degree of importance of the video data into a packet; and

a wireless transmitter operable to wirelessly transmit packetized video data.

4. The wireless transmission system of claim 3, further comprising:

a wireless receiver operable to receive the packetized video data;

a packet assembly unit operable to separate from the packetized video data the information field, to extract the encoded video data, and to assemble the extracted video data; and

a weight video decoder operable to determine a complexity of a recovery method according to the degree of importance of the video data and operable to recover the assembled video data by the recovery method having the determined complexity.