Avaya Inc.

At&t Corp.

At&t Bell Laboratories

Joseph L Hall

Paul Roller Michaelis

James David Johnston

Jon Louis Bentley

Heinz Teutsch

Mark Fletcher

Avram Levi

A Public Safety Answering Point (PSAP) is disclosed. The PSAP is configured to enable the detection of language preferences, capabilities, or inabilities and, based on such detection, assist the PSAP agent in assisting the PSAP caller. The PSAP may additionally or alternatively utilize the detection of language information to assist in the decision to route or re-route the PSAP caller to appropriate PSAP resources.

Public safety answering point language detection

Methods, apparatus, and systems are provided such that a Public Safety Answering Point (PSAP) may utilize a new model to handle Open Line emergency calls, including audio optimization, automation, analysis, and presentation. Embodiments of the present disclosure assist with the difficult task of identifying background noise while trying to listen and talk to a caller, and give the best possible audio from the caller to the emergency call-taker or dispatcher. More particularly, an audio stream is split into at least two instances, with a first instance being optimized for speech intelligibility and provided to a call-taker or dispatcher and a second instance being provided for background sound analysis. Accordingly, the new PSAP Open Line model may allow for significantly more efficient emergency assessment, location, and management of resources.

Method, apparatus, and system for providing real-time PSAP call analysis

A technique for the masking of quantizing noise in the coding of audio signals is usable with the types of channel coding known as 'noiseless' or Huffman coding and with variable radix packing. In a multichannel environment, noise masking thresholds may be determined by combining sets of power spectra for each of the channels. The stereophonic embodiment eliminates redundancies in the sum and difference signals, so that the stereo coding uses significantly less than twice the bit rate of the comparable monaural signal. The technique can be used both in transmission of signals and in recording for reproduction, particularly recording and reproduction of music. Compatibility with the ISDN transmission rates known as 1B, 2B and 3B rates has been achieved.

Perceptual coding of audio signals using entropy coding and/or multiple

A technique for the masking of quantizing noise in the coding of audio signals is adapted to include geometric interpolation between the thresholds for a tone masking noise and for noise masking a tone, in order to reduce use of bit-rate capability where it is not necessary for transparent or high quality. The technique is usable with the types of channel coding known as 'noiseless' or Huffman coding and with variable radix packing. The stereophonic embodiment eliminates redundancies in the sum and difference signals, so that the stereo coding uses significantly less than twice the bit rate of the comparable monaural signal. The technique can be used both in transmission of signals and in recording for reproduction, particularly recording and reproduction of music. Compatibility with the ISDN transmission rates known as 1 B, 2 B and 3 B rates has been achieved.

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Basking Ridge, NJ, United States of America

Joseph L Hall