Gateway With Voice

• US 20100191525A1
• Filed: 10/16/2009
• Published: 07/29/2010
• Est. Priority Date: 04/13/1999
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Hartman, David, RABENKO, Theodore F., Thi, James C.H.
• Granted Patent: US 8,254,404 B2
• Time in Patent Office: Days
• US Class Current: 704/211
• CPC Class Codes: H04B 3/23 using a replica of transmitted signal in the time domain, e.g. echo cancellers
• CPC Class Codes: H04B 3/234 using double talk detection
• CPC Class Codes: H04J 3/0632 Synchronisation of packets and cells, e.g. transmission of voice via a packet network, circuit emulation service [CES] queuing arrangements in packet switching elements H04L49/90; synchronising systems for the synchronous transmission of a pulse code modulated video signal with one or more other pulse code modulated signals H04N7/56
• CPC Class Codes: H04L 12/2801 Broadband local area networks
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 7/0029 interpolation of received data signal
• CPC Class Codes: H04M 7/125 Details of gateway equipment
• CPC Class Codes: H04N 21/2383 Channel coding or modulation of digital bit-stream, e.g. QPSK modulation arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/4382 Demodulation or channel decoding, e.g. QPSK demodulation analog front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002

Abstract

In one aspect of the present invention, a network gateway is configured to facilitate on line and off line bi-directional communication between a number of near end data and telephony devices with far end data termination devices via a hybrid fiber coaxial network and a cable modem termination system. The described network gateway combines a QAM receiver, a transmitter, a DOCSIS MAC, a CPU, a voice and audio processor, an Ethernet MAC, and a USB controller to provide high performance and robust operation.

Claims

1. An apparatus for synchronizing a voice data, comprising:

a first voice queue configured to store samples of the voice data to provide a first stored voice sample;

a voice synchronizer configured to up-sample the first stored voice sample from the first voice queue by a ratio of a first count to a second count when the first count is greater than the second count and to down-sample the first stored voice sample by the ratio of the first count to the second count when the first count is less than or equal to the second count to provide a re-sampled voice sample;

a second voice queue configured to store the re-sampled voice sample; and

a digital to analog converter (DAC) configured to convert a second stored sample from the second voice queue from a digital representation to an analog representation,

wherein the apparatus is configured such that a rate at which the DAC removes the second stored sample is substantially equivalent to a rate at which the second stored sample is inserted into the second voice queue.