US 8,751,223 B2Granted

Encoded packet selection from a first voice stream to create a second voice stream

AssigneeAlcatel Lucent

InventorsJeffrey A. Hiltner, Alan H. Matten, Dale R. Schumacher, Albert J. Such

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Abstract

In one implementation, a first voice stream for a packet-switched call is received from a calling party. The first voice stream conforms to a first silence suppression scheme and comprises a plurality of encoded packets for the packet-switched call. A subset of encoded packets are selected from the plurality of encoded packets to create a second voice stream that conforms to a second silence suppression scheme. The second voice stream comprises the subset of encoded packets. The first silence suppression scheme is distinct from the second silence suppression scheme. The second voice stream is forwarded toward a called party for the packet-switched call.

Claims15

Dependent claims

A method, comprising the steps of:

receiving a first voice stream for a packet-switched call from a calling party, wherein the first voice stream conforms to a first silence suppression scheme and comprises a plurality of encoded packets for the packet-switched call;
selecting a subset of encoded packets from the plurality of encoded packets to create a second voice stream that conforms to a second silence suppression scheme, wherein the second voice stream comprises the subset of encoded packets, wherein the first silence suppression scheme is distinct from the second silence suppression scheme;
and
forwarding the second voice stream toward a called party for the packet-switched call, wherein the first voice stream comprises a first discontinuous transmission (DTX) stream and wherein the second voice stream comprises a second DTX stream,
wherein the step of selecting the subset of encoded packets comprises the step of:
selecting the subset of encoded packets according to the second silence suppression scheme, such that the second DTX stream conforms to the second silence suppression scheme,
wherein the first and second silence suppression schemes comprise respective first and second silence suppression intervals;
wherein the plurality of encoded packets comprise at least one of:
a synchronous packet, sent upon the first silence suppression interval according to the first silence suppression scheme, or
an asynchronous packet, sent independently of the first silence suppression interval according to the first silence suppression scheme;
wherein the step of selecting the subset of encoded packets comprises the step of:
selecting, upon the second silence suppression interval, a most recently received packet of the at least one of the synchronous packet or the asynchronous packet, wherein the subset of encoded packets comprises the most recently received packet;
wherein the step of forwarding the second DTX stream comprises the step of:
forwarding the most recently received packet upon the second silence suppression interval.

11 more elements

An apparatus, comprising:

a silence suppression interface component configured to receive a first voice stream for a packet-switched call from a transmitting device;
wherein the first voice stream conforms to a first silence suppression scheme and comprises a plurality of encoded packets for the packet-switched call;
wherein the silence suppression interface component is configured to select a subset of encoded packets from the plurality of encoded packets to create a second voice stream that conforms to a second silence suppression scheme;
wherein the second voice stream comprises the subset of encoded packets;
wherein the first silence suppression scheme is distinct from the second silence suppression scheme;
wherein the silence suppression interface component is configured to forward the second voice stream toward a receiving device for the packet-switched call;
wherein the first voice stream comprises a first discontinuous transmission (DTX) stream;
wherein the second voice stream comprises a second DTX stream;
wherein the first and second silence suppression schemes comprise respective first and second silence suppression intervals;
wherein the plurality of encoded packets comprise at least one of:
a synchronous packet, sent upon the first silence suppression interval according to the first silence suppression scheme, or
an asynchronous packet, sent independently of the first silence suppression interval according to the first silence suppression scheme;
wherein the silence suppression interface component is configured to select a most recently received packet of the at least one of the synchronous packet or the asynchronous packet upon the second silence suppression interval.

10 more elements

An article, comprising:

one or more non-transitory processor-readable media storing instructions which, when executed by a processor, cause the processor to perform a method comprising the steps of:
receiving a first voice stream for a packet-switched call from a calling party, wherein the first voice stream conforms to a first silence suppression scheme and comprises a plurality of encoded packets for the packet-switched call;
selecting a subset of encoded packets from the plurality of encoded packets to create a second voice stream that conforms to a second silence suppression scheme, wherein the second voice stream comprises the subset of encoded packets, wherein the first silence suppression scheme is distinct from the second silence suppression scheme;
and
forwarding the second voice stream toward a called party for the packet-switched call, wherein the first voice stream comprises a first discontinuous transmission (DTX) stream and wherein the second voice stream comprises a second DTX stream,
wherein the step of selecting the subset of encoded packets comprises the step of:
selecting the subset of encoded packets according to the second silence suppression scheme, such that the second DTX stream conforms to the second silence suppression scheme,
wherein the first and second silence suppression schemes comprise respective first and second silence suppression intervals;
wherein the plurality of encoded packets comprise at least one of:
a synchronous packet, sent upon the first silence suppression interval according to the first silence suppression scheme, or
an asynchronous packet, sent independently of the first silence suppression interval according to the first silence suppression scheme;
wherein the step of selecting the subset of encoded packets comprises the step of:
selecting, upon the second silence suppression interval, a most recently received packet of the at least one of the synchronous packet or the asynchronous packet, wherein the subset of encoded packets comprises the most recently received packet;
wherein the step of forwarding the second DTX stream comprises the step of:
forwarding the most recently received packet upon the second silence suppression interval.

12 more elements

Dependencies are inferred from the claim text.