US 7,813,378 B2 · Wideband-narrowband telecommunication

Abstract

Here is described a method, a near end telecommunications terminal and a computer executable software code which allow to perform a telecommunications with a far end telecommunications terminal providing the option of applying a narrowband encoding technique without loosing the benefit of a wideband encoding technique. This is achieved after setting up a telecommunications between that near end telecommunications terminal and the far end telecommunications terminal by applying by the codec from the near end telecommunications terminal a sampling when encoding corresponding to a wideband encoding technique while assembling the resulting timeslots into frames to be transmitted to the far end telecommunications terminal via RTP. Furthermore, the sampled timeslots are assembled when applying the wideband encoding technique according to the parity of the sequential integer number from the sampled timeslots to generate two kind of frames, one with all the timeslots identified by even sequential numbers, the other one with the remaining timeslots identified by odd sequential numbers.

Claims12

Dependent claims

A method for providing telecommunications between a near end and at least a far end telecommunications terminal, each telecommunications terminal having a codec, the method comprising:

setting up telecommunications between the near end telecommunications terminal and the far end telecommunications terminal;
applying a wideband encoding technique codec at the near end telecommunications terminal to sampled timeslots;
assembling the sampled timeslots when applying the wideband encoding technique according to the parity of their sequential integer number to generate two kinds of Real Time Protocol (RTP) frames to be transmitted to the far end telecommunications terminal via a packet switched network using Real Time Protocol, one with all the timeslots identified by even sequential numbers, the other one with the remaining timeslots identified by odd sequential numbers;
transmitting to the far end telecommunications terminal each of the two kinds of RTP frames via a different specific RTP stream corresponding to a narrowband channel, the two kinds of RTP frames having timestamps related to each other using the same reference clock, wherein each timestamp relates to the mean value of the RTP frame payload time of a RTP frame of the first kind and a RTP frame of the second kind;
and
if applying a wideband decoding technique at reception of the two kinds of RTP frames, then reassembling the timeslots according to the initial sequence.

3 more elements

A near end telecommunications terminal comprising:

a codec applying a wideband encoding technique for telecommunication between the near end telecommunications terminal and at least a far end telecommunications terminal, wherein the codec, while encoding assembling sampled timeslots into frames to be transmitted to the far end telecommunications terminal via a packet switched network using Real Time Protocol (RTP), assembles the sampled timeslots according to the parity of their sequential integer number to generate two kinds of RTP frames, one kind of RTP frame with all the timeslots identified by even sequential numbers, the other kind of RTP frame with the remaining timeslots identified by odd sequential numbers, the two kinds of frames having timestamps related to each other using the same reference clock, wherein each timestamp relates to the mean value of the RTP frame payload time of a RTP frame of the first kind and a RTP frame of the second kind, wherein the near end telecommunications terminal transmits to the far end telecommunications terminal each of the two kinds of RTP frames via a different specific RTP stream each corresponding to a narrowband channel.

Dependencies are inferred from the claim text.

Wideband-narrowband telecommunication

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Wideband-narrowband telecommunication

Life of this patent

Abstract

Claims12