LandOfFree - US Patents - Listing for Telephonic communications,Supervisory or control line signaling,Signal receiver

Telephonic communications – Supervisory or control line signaling – Signal receiver

Push-button signal receiving device and a gain control method

Telephonic communications – Supervisory or control line signaling – Signal receiver

Recognition of a single frequency tone

Telephonic communications – Supervisory or control line signaling – Signal receiver

Robust signaling tone frequency measurement

Telephonic communications – Supervisory or control line signaling – Signal receiver

Rotary dial pulse receiver

Telephonic communications – Supervisory or control line signaling – Signal receiver

Selective tone event detector and method therefor

Telephonic communications – Supervisory or control line signaling – Signal receiver

Signal detecting device

Telephonic communications – Supervisory or control line signaling – Signal receiver

Signal detection and discrimination using waveform peak factor

Telephonic communications – Supervisory or control line signaling – Signal receiver

Signal detector with coefficient swapping transform unit

Telephonic communications – Supervisory or control line signaling – Signal receiver

Signal detector with duration-based frame width

Telephonic communications – Supervisory or control line signaling – Signal receiver

Signal detector with echo cancellation

Telephonic communications – Supervisory or control line signaling – Signal receiver

Signal detector with matched filter coefficient

Telephonic communications – Supervisory or control line signaling – Signal receiver

Signal-recognition arrangement using cadence tables

Telephonic communications – Supervisory or control line signaling – Signal receiver

Speech immunity enhancement in linear prediction based DTMF dete

Telephonic communications – Supervisory or control line signaling – Signal receiver

System and method for DTMF detection using likelihood ratios

Telephonic communications – Supervisory or control line signaling – Signal receiver

System and method for dual tone multifrequency detection using v

Telephonic communications – Supervisory or control line signaling – Signal receiver

System and method for modifying voice signals to avoid triggerin

Telephonic communications – Supervisory or control line signaling – Signal receiver

System and method for suppressing in-band stimuli and...

Telephonic communications – Supervisory or control line signaling – Signal receiver

Telephone answering device with low cost dual tone multi-frequen

Telephonic communications – Supervisory or control line signaling – Signal receiver

Telephone tone analysis system