Texas Instruments Corporation

Telogy Networks, Inc.

Other

Edward B Morgan

Zoran Mladenovic

Joseph A Crupi

Andrew Michael Allen

Manoj Sindhwani

David Alston Lide

Bogdan R Kosanovic

Richard M Moore, Jr

William A Mills

William H Blum

Michael Konopinski

Nagendra Kumar

William Witowsky

Zoran M Ladenovic

Negendra Kumar

The generation and upstream transmission of voice packets in an HFC network is controlled by including a synchronization circuit in the broadband terminal interface unit. The synchronization circuit is used to generate the timing signals for the codec, DSP and host microprocessor so that as the host microprocessor receives an upstream grant, the remaining components will assemble and forward the packets in synchronization with the grant.

Synchronization arrangement for packet cable telephony modem

A system and method for reducing or eliminating degradation in voice transmission quality resulting from repeated or sequential compression and decompression of voice packets over one or more packet networks. When a voice connection is established between two parties on separate packet networks, the signal is often passed through a PBX and/or over PSTN lines, with the occurrence of two tandem low-bit-rate codecs used to transfer the signal and introducing degradation of voice quality. This situation arises frequently in voice-over-packet applications. The situation can also arise when a call is forwarded from one place to another. The present invention reduces the degradation associated with the transport of voice data and thereby improving the voice quality by removing one of the tandem codecs.

Apparatus and method for improving voice quality by removing tandem codecs in a voice communication link

The transport of ABCD bits in a digital packet network is facilitated by the inclusion of the ABCD bits into the RTP header of the digital packets. The ABCD bits are first placed in the unused bits of the RTP header. Redundancy of the previous ABCD bits, when applicable, is achieved by restricting the size of fields in the header to reserve space for redundant ABCD bits. The ABCD bits are placed in the reserved portions of restricted header fields.

Transporting ABCD bits using RTP

A telecommunications gateway allows packets to be sent over a TDM system and allows TDM traffic to be sent over a packet switched network. The gateway is a universal port that includes a plurality of Digital Signal Processors (DSPs) that are controlled by software. The controlling software determines what single function the DSP will perform over multiple channels. Each DSP handles multiple channels, however, each DSP is restricted such that all of its multiple channels are permitted to handle the telecommunications traffic according to one signaling protocol.

Dynamic DSP allocation for universal access to a packet network

In a system in which user equipment is connected to a packet network and a speech recognition application server is also connected to the packet network for performing speech recognition on speech data from the user equipment, a speech recognition system selectively performs feature extraction at a user end before transmitting speech data to be recognized. The feature extraction is performed only for speech which is to be recognized.

Speech recognition over packet networks

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Germantown, MD, United States of America

Edward B Morgan