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 |
US4085449
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
|
IEEE1162653
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)
|
IEEE1164362
N/A |
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)
|
IEEE1095518
N/A |
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
|
IEEE1169067
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
|
US4592074
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
|
US4726069
None |
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
|
IEEE1146301
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
|
IEEE1168781
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
|
IEEE1168090
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
|
US4754258
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
|
GB2073979
TEKTRONIX INC |
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)
|
IEEE1172052
N/A |
RELP speech coder
|
The signal is digitized by RELP (Page 1319)
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
IEEE1052483
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
|