DATA TRANSMISSION APPARATUS AND METHOD

• US 20070223449A1
• Filed: 05/30/2007
• Published: 09/27/2007
• Est. Priority Date: 10/31/2000
• Status: Abandoned Application

• Current Assignee: Tadaaki Masuda, Takeshi Nagai, Yoshihiro Kikuchi
• Original Assignee: Tadaaki Masuda, Takeshi Nagai, Yoshihiro Kikuchi
• Inventors: Kikuchi, Yoshihiro, Masuda, Tadaaki, NAGAI, Takeshi
• Application Number:
  US11/755,599
• Publication Number:
  US 20070223449A1
• Time in Patent Office: Days
• US Class Current: 370/351
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0014 by adapting the source coding
• CPC Class Codes: H04L 1/0015 characterised by the adaptation strategy
• CPC Class Codes: H04L 1/0019 in which mode-switching is based on a statistical approach
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/205 jitter monitoring
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/11 Identifying congestion
• CPC Class Codes: H04L 47/25 with rate being modified by the source upon detecting a change of network conditions
• CPC Class Codes: H04L 47/283 in response to processing delays, e.g. caused by jitter or round trip time [RTT]
• CPC Class Codes: H04N 21/6377 directed to server one-way streaming services wherein the source is controlled by the destination H04L65/613
• CPC Class Codes: H04N 21/658 Transmission by the client directed to the server

Abstract

A data transmission apparatus comprises an estimation device to estimate a transmission condition of the transmission channel in the transmitter based on at least Jitter information or a packet loss rate obtained from the receiver, and a controller to change at least one of a bit rate of transmission data and a error resilience level according to the estimated transmission condition.

Claims

1. A computer readable storage medium storing instructions of a computer program which when executed by a computer results in performance of steps comprising:

receiving network information regarding a network condition of a network;

determining the network condition based on the network information;

switching among storage media according to the network information to select one of the encoded data sets that has a transmission rate corresponding to switching information, the storage media having stored a plurality of respective encoded data sets encoded at different respective transmission rates; and

selecting a transmission rate of encoded data to be transmitted based on the network condition information to output the selected transmission rate as the switching information,

2. The medium according to claim 1, wherein the switching step includes a step of detecting a switching position at which one of the storage media is switched to the other, and when an encoded data switching signal is generated by the switching information, the detecting step detects the switching position, to switch one of the storage media at the switching position.