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US 5,517,492 AGranted
Increased speech interleave with reduced delay
AssigneeMotorola, Inc.
InventorStephen Spear
Life of this patent
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Abstract
In a TDM readiotelephone network, there is provided a mechanism for introducing link asymmetry between an uplink and a downlink, paired frame alternation on the uplink and downlink and bandwidth multiplexing/sharing/apportionment within and among successive frames. The result is increased interleaving depth and a reduction in round-trip delay from the traditional half-rate speech coding approaches.
Claims8
A transmitter apparatus comprising, operatively coupled in series:
- means for encoding speech from a user,
- means for interleaving with encoded speech of others logically sharing a communications channel, speech so encoded into alternate pairs of frames of encoded speech,
- and means for transmitting to the communications channel successive frames of encoded speech so interleaved.
A receiver apparatus comprising, operatively coupled in series:
- means for receiving for a recipient from a communications channel frames of encoded speech that have been interleaved in alternating pairs with frames of encoded speech of others logically sharing the communications channel,
- means for demultiplexing from the frames of encoded speech of others logically sharing the communications channel, the frames of encoded speech of the recipient,
- and means for decoding for audio reproduction the frames of encoded speech of the recipient.
A radio transceiver comprising:
- a receive portion having, operatively coupled in series:
- means for receiving for a user from a communications channel frames of encoded speech that are interleaved in alternate pairs with flames of others logically sharing the communications channel,
- means for demultiplexing from the frames of others logically sharing the communications channel, the frames of encoded speech for the user, and
- means for decoding for audio reproduction the frames of encoded speech for the user, and
- a transmit portion having, operatively coupled in series:
- means for encoding speech from the user,
- means for interleaving with encoded speech of others logically sharing the communications channel, speech so encoded into alternate pairs of frames of encoded speech;
- and means for transmitting to a communications channel successive frames of encoded speech so interleaved.
5 more elements
A method of transmitting and receiving encoded speech comprising:
- receiving for a user from a communications channel frames of encoded speech that are interleaved in alternate pairs with frames of others logically sharing the communications channel,
- demultiplexing from the frames of others logically sharing the communications channel, the frames of encoded speech for the user, and
- decoding for audio reproduction the frames of encoded speech for the user, and
- encoding speech from the user,
- interleaving with encoded speech of others logically sharing the communications channel, speech so encoded into alternate pairs of frames of encoded speech, and
- transmitting to a communications channel successive frames of encoded speech so interleaved.
3 more elements
Dependencies are inferred from the claim text.