×

Method and apparatus for transmitting coded audio signals through a transmission channel with limited bandwidth

  • US 20010038686A1
  • Filed: 07/03/2001
  • Published: 11/08/2001
  • Est. Priority Date: 04/10/1995
  • Status: Active Grant
First Claim
Patent Images

1. An portable audio transmission system comprising:

  • a coder for coding an input audio signal into a digital signal at a transmission speed including 28.8 kbit/s to be transmitted through a traditional analog copper telephone line generally supporting a digital signal transmission rate of at least 28.8 kbit/s; and

    a decoder for decoding the digital signal that is received from a telephone network to provide an output audio signal with a frequency range of greater than 4 kilohertz.

View all claims
  • 9 Assignments
Timeline View
Assignment View
    ×
    ×