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Patent/Assignee Device Type Claim 1 Element 1 - Baseband Processor Claim 1 Element 2 - Storage Devices Claim 1 Element 3 - Modem Claim 1 Element 4 - Interpolator Claim 1 Element 5 - PAL Claim 1 Element 6 - D/A Converter Claim 1 Element 7 - Deglitching
    Paradyne Corporation
Digital modem for high speed data transmission (Column 10, line 11-15) Encoder (Fig. 3) Storage devices stores information for moduation (Column 9, line 37 - 38) Modem access storage devices and modulates (Column 9, line 49 - 53) Modem coupled to interpolator to increase sampling rate (Column 9, line 49 - 53, Fig. 3) N/A D/A converter converts interpolated signal to analog (Column 9, line 53 - 54, Fig. 3) N/A
A-D-A converter N/A N/A N/A N/A N/A The digital input is converted into analog form. (Fig. 1 & Page 146) 16-bit DAC is used for converting digital to analog and then removes glitches (Fig. 1 & Page 146)
N/A N/A N/A N/A Digital Interpolator for increasing the sampling rate and analog filter is also in cascade with it (Page 578 & Fig. 1) N/A The analog representation of the time - discrete can be found by applying interpolation functions or when the signal samples are equispaced by filtering procedure (Page 579) Only the necessary samples of the analog signals are calculated using the above described methods. Therefore the sampling rate content can be reduced at the output. which is nothing but a deglitched signal.(Fig. 2, Page 578 & 579)
Private line voice concentrator N/A The speech data is stored in buffer memory (Page 780) A DPSK modem is used here to transmit full duplex data (Page 780) PLC-1 can be used as an interpolator to increase the transmission capacity (Abstract) N/A N/A N/A
Transcoder Base band processor converts the 64Kbps u-law PCM to 14.57... Kbps i.e. u-law to linear conversion which is performed here by Tables of the transcoder (Page 350) RAM stores the old signals received and EEPROM is also used for handling full duplex channels (Page 351) N/A N/A N/A N/A N/A
    Rockwell International Corporation
Digital frequency translator for digital signal processing (Column 2, line 42-45) N/A N/A N/A N/A Frequency translator performs quadrature mixing (Column 2 and 3, line 60 - 68 and 1 - 9) N/A N/A
Transceiver for SSB or digital communication (Column 10, line 50) Manchester coding for tone-coded signals (Column 9, line 24-31) N/A Audio processor coupled to modulator for modulation (Column 9, line 51- 63) N/A N/A N/A N/A
Voice-band modem N/A RAM stores the operands and results of arithmetic operations (Page 84) Modem uses PSK for lower speeds and combined phase and amplitude modulation i.e. QAM for higher speeds (Page 82) N/A N/A N/A N/A
Integrated RELP vocoder and LPEC Both RELP and echo cancellation is performed within a single microprocessor (Page 1334) The processor has external memory and RAM (Page 1335) N/A N/A N/A N/A N/A
Transcoder Look-up tables are used for direct conversion of u-law to linear PCM (Page 1422) PROM's are used within program memory as storage devices (Page 1422) N/A N/A N/A N/A N/A
    Kabushiki Kaisha Toshiba
Transcoder for digital communication (Column 12, line 19-20) Integrated circuit transcodes input signal (Fig. 1) N/A N/A N/A N/A N/A N/A
Deglitching circuit for digital signal processing (Column 2, line 86 - 87) N/A N/A N/A N/A N/A N/A Deglitching circuit removes glitches (Column 2, line 16 - 28, Fig. 1)
RELP speech coder The signal is digitized by RELP (Page 1319) N/A N/A N/A N/A N/A N/A
Echo canceller Memory compensation echo canceller uses RAM for echo cancellation (Page 68) N/A N/A N/A N/A N/A N/A


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