Patent ID: 7801969
Filing Date: 2010-09-21
Classification: H04J,H04N

Abstract:
1. A real-time picture information compression-transmission apparatus for compression-transmitting live picture information in a real time manner, comprising: input means for receiving said live picture information; an encoder encoding said live picture information from the input means on a preset cycle in a real time manner; storage means for writing and storing real-time-encoded frame data on said picture information from the encoder for each frame; division means for sequentially dividing said real-time-encoded frame data stored in the storage means into packets for each frame; and transmission timing control and transmission means for controlling transmission timing to sequentially transmit the divided packets to a network after a write time for storing said frame data for the packets and before a time for storing next frame data, and for transmitting the package to the network according to a connection-less type protocol; packet loss detection means for detecting packet loss of the packets transmitted to the network; and encoding bit rate control means for controlling an encoding bit rate of said encoder by the detected packet loss, wherein the control of said transmission timing is carried out so that a packet transmission delay corresponds to a value obtained by dividing an eightfold value of a product between the Ethernet maximum transfer unit and a packet transmission timing fine adjustment parameter by an effective network band in bit/sec, and so that an upper limit of the packet transmission timing fine adjustment parameter corresponds to a value obtained by dividing an average packet transmission interval by a time required to transmit the Ethernet maximum transfer unit.