Patent ID: 8208500
Filing Date: 2012-06-26
Classification: H04J,H04R

Abstract:
1. A communication system with latency control for realizing a controllable end-to-end latency and for reducing time jitter on the end-to-end latency, said system comprising: a transmitter including: a transmit control unit for generating a time reference TrefTx and a related time synchronization symbol, said transmit control unit taking a snapshot TxScnt of the transmit sample counter at said time reference; a transmit time stamp unit for generating transmit time stamp information based on the value TxScnt; a transmit unit for transmitting the time reference symbol, the payload data representing the input data samples, and the related time stamp information; and a receiver including: a time synchronization unit for detecting the transmitted time reference symbol, generating a time reference Tref Rx, which has a fixed and known time relationship with respect to TrefTx, and for providing the time reference Tref Rx to time stamp unit; a latency control block for generating an estimate FsTxe of the data sample rate FsTx at the input of the transmitter, based on the received transmitter time stamp, on the receiver time stamp generated by time stamp unit and on a target latency between the transmitter timestamp and the receiver time stamp.