Patent US4581746A successfully refreshed from Google Patents.
US4581746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Technique for insertion of digital data bursts into an adaptively encoded information bit stream
Assignee: Nokia Bell Labs
•
Filing: 1983-12-27
•
Granted: 1986-04-08
•
Expires: 2003-12-27
Abstract
Abstract The present invention relates to a transmitter and a receiver for use in a digital communication system which are capable of transmitting and receiving, respectively, a single duplex analog signal channel, such as, for example, a voice channel, and limited short asynchronous data bursts. The transmitter portion includes an encoding means which uses an adaptive companding algorithm in the encoding process while the receiver portion includes a decoding means using the same synchronized algorithm in the decoding process. The transmitter and receiver at each end of a communication channel also include a signaling interface which can interrupt the coding and decoding process to transmit and receive, respectively, an occasional data burst without upsetting the synchronization of the adaptive companding algorithm states at both ends of the channel.
Inventors
- 👤 Hamilton W. Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:31
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/06; H04M11/064; H04B; H04B14/00; H04B14/02; H04B14/06; H04B14/062; H04B14/064
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
416 words
A digital transceiver comprising: encoding means responsive to an analog input signal for encoding the analog input signal in accordance with a predetermined adaptive companding algorithm into a representative digital pulse pattern for transmission over a communication channel; decoding means responsive to a digital pulse pattern received from the communication channel for decoding said digital pulse pattern into an analog output signal in accordance with the predetermined adaptive companding algorithm used by the encoding means; and a signaling interface comprising interrupting means capable of (a) interrupting the coding means for a predetermined period of time and maintaining the predetermined adaptive companding algorithm used by the encoding means at the state found immediately prior to the interruption period during said interruption period to permit the transmission of a digital burst of data information over the communication channel during said interruption period, and (b) interrupting the decoding means for a predetermined period of time and maintaining the predetermined adaptive algorithm used in the decoding means at the state found immediately prior to the interruption thereof to permit the reception of a digital burst of data information during the interruption period, the interrupting means comprising; means for composing a digital burst of data information including a unique arrangement of symbols for identifying said burst as a digital burst of data information; switching means disposed for receiving the digital pulse pattern from the encoding means and for directing the digital pulse pattern from the encoding means to the communication channel in response to a first control signal and directing the output from the composing means to the communication channel in response to a second control signal; and control means responsive to a complete composition of a digital burst of data information in the composing means for generating (a) said second control signal for transmission to both the switching means for directing the output from the composing means to the communication channel, and the encoding means to initiate an interruption of the predetermined adaptive companding algorithm used therein, (b) third control signals to the composing means for directing the composed digital burst of data information to the switching means for transmission to the communication channel, and, after the digital burst of data information has been directed out of the composing means, (c) said first control signal to both the switching means for directing the digital pulse pattern from the encoding means to the communication channel, and the encoding means to terminate the interruption of the predetermined adaptive companding algorithm used therein.
Claim 2
Dependent Claim
416 words
A digital transceiver comprising: encoding means responsive to an analog input signal for encoding the analog input signal in accordance with a predetermined adaptive companding algorithm into a representative digital pulse pattern for transmission over a communication channel; decoding means responsive to a digital pulse pattern received from the communication channel for decoding said digital pulse pattern into an analog output signal in accordance with the predetermined adaptive companding algorithm used by the encoding means; and a signaling interface comprising interrupting means capable of (a) interrupting the coding means for a predetermined period of time and maintaining the predetermined adaptive companding algorithm used by the encoding means at the state found immediately prior to the interruption period during said interruption period to permit the transmission of a digital burst of data information over the communication channel during said interruption period, and (b) interrupting the decoding means for a predetermined period of time and maintaining the predetermined adaptive algorithm used in the decoding means at the state found immediately prior to the interruption thereof to permit the reception of a digital burst of data information during the interruption period, the interrupting means comprising; means for composing a digital burst of data information including a unique arrangement of symbols for identifying said burst as a digital burst of data information; switching means disposed for receiving the digital pulse pattern from the encoding means and for directing the digital pulse pattern from the encoding means to the communication channel in response to a first control signal and directing the output from the composing means to the communication channel in response to a second control signal; and control means responsive to a complete composition of a digital burst of data information in the composing means for generating (a) said second control signal for transmission to both the switching means for directing the output from the composing means to the communication channel, and the encoding means to initiate an interruption of the predetermined adaptive companding algorithm used therein, (b) third control signals to the composing means for directing the composed digital burst of data information to the switching means for transmission to the communication channel, and, after the digital burst of data information has been directed out of the composing means, (c) said first control signal to both the switching means for directing the digital pulse pattern from the encoding means to the communication channel, and the encoding means to terminate the interruption of the predetermined adaptive companding algorithm used therein.
Claim 3
Dependent Claim
144 words
A digital transceiver according to claim 1 wherein the interrupting means of the signaling interface further comprises: means for detecting the unique arrangement of symbols in the received digital pulse pattern from the channel identifying a digital burst of data information and for generating a control signal in response to such detection; and the control means is further responsive to the control signal from the detecting means for generating (a) a fourth control signal to the decoding means to initiate an interruption of the predetermined adaptive companding algorithm thereof, (b) fifth control signals for accessing the portion of the detected digital burst of data information comprising data symbols, and (c) a sixth control signal to the decoding means after the accessing of the data symbols to be received is complete to terminate said interruption of the predetermined adaptive companding algorithm of the decoding means.
Claim 4
Dependent Claim
27 words
A digital transceiver according to claim 2 wherein the encoding means is an adaptive delta modulation coder and the decoding means is an adaptive delta modulation decoder.
Claim 5
Dependent Claim
80 words
A digital transceiver according to claim 3 wherein the transceiver further comprises: means for modulating both the digital pulse pattern from the encoding means and a digital burst of data information in order to generate a representative output signal from the transceiver for transmission over the communication channel; and demodulating means responsive to a signal received from the communication channel for demodulating the received signal into a representative digital pulse pattern for transmission to the signaling interface and decoding means.
Claim 6
Dependent Claim
74 words
A digital transceiver according to claim 4 wherein the transceiver further comprises: means for encrypting both the digital pulse pattern from the encoding means and a digital burst of data information in accordance with a predetermined privacy code prior to the transmission thereof over the communication channel; and means for decrypting a digital pulse pattern received from the communication channel in accordance with the same predetermined privacy code as used by the encrypting means.
Claim 7
Dependent Claim
27 words
A digital transceiver according to claim 1 wherein the encoding means is an adaptive delta modulation coder and the decoding means is an adaptive delta modulation decoder.
Claim 8
Dependent Claim
80 words
A digital transceiver according to claim 6 wherein the transceiver further comprises: means for modulating the digital pulse pattern from the encoding means and a digital burst of data information in order to generate a representative output signal from the transceiver for transmission over the communication channel; and demodulating means responsive to a signal received from the communication channel for demodulating the received signal into a representative digital pulse pattern for transmission to the signaling interface and the decoding means.
Claim 9
Dependent Claim
80 words
A digital transceiver according to claim 1 wherein the transceiver further comprises: means for modulating both the digital pulse pattern from the encoding means and a digital burst of data information in order to generate a representative output signal from the transceiver for transmission over the communication channel; and demodulating means responsive to a signal received from the channel for demodulating the received signal into a representative digital pulse pattern for transmission to the signaling interface and the decoding means.
Claim 10
Dependent Claim
73 words
A digital transceiver according to claim 1 wherein the transceiver further comprises: means for encrypting both the digital pulse pattern from the encoding meas and a digital burst of data information in accordance with a predetermined privacy code prior to the transmission thereof over the communication channel; and means for decrypting a digital pulse pattern received from the communication channel in accordance with the same predetermined privacy code used by the encrypting means.
Claim 11
Dependent Claim
329 words
A digital transmitter comprising: encoding means responsive to an analog input signal for encoding the analog input signal in accordance with a predetermined adaptive companding algorithm into a representative digital pulse pattern for transmission over a communication channel; and a signaling interface comprising interrupting means capable of interrupting the encoding means for a predetermined period of time and maintaining the predetermined adaptive companding algorithm used by the encoding means at the state found immediately prior to the interruption period to permit the transmission of a digital burst of data information over the communication channel during the interruption period, the interrupting means comprising means for composing a digital burst of data information including a unique arrangement of symbols for identifying said burst as a digital burst of data information; switching means disposed for receiving the digital pulse pattern from the encoding means and for directing the digital pulse pattern from the encoding means to the communication channel in response to a first control signal and for directing the output from the composing means to the communication channel in response to a second control signal; and control means responsive to a complete composition of a digital burst of data information in the composing means for generating (a) said second control signal for transmission to both the switching means for directing the output from the composing means to the communication channel and the encoding means to initiate an interruption of the predetermined adaptive companding algorithm used by the encoding means, (b) third control signals to the composing means for directing the composed digital burst of data information to the switching means for transmission to the communication channel, and, after the digital burst of data information has been directed out of the composing means, (c) said first control signal to both the switching means for directing the digital pulse pattern from the encoding means to the communication channel, and the encoding means to terminate the interruption of the predetermined adaptive copanding algorithm thereof.
Claim 12
Dependent Claim
329 words
A digital transmitter comprising: encoding means responsive to an analog input signal for encoding the analog input signal in accordance with a predetermined adaptive companding algorithm into a representative digital pulse pattern for transmission over a communication channel; and a signaling interface comprising interrupting means capable of interrupting the encoding means for a predetermined period of time and maintaining the predetermined adaptive companding algorithm used by the encoding means at the state found immediately prior to the interruption period to permit the transmission of a digital burst of data information over the communication channel during the interruption period, the interrupting means comprising means for composing a digital burst of data information including a unique arrangement of symbols for identifying said burst as a digital burst of data information; switching means disposed for receiving the digital pulse pattern from the encoding means and for directing the digital pulse pattern from the encoding means to the communication channel in response to a first control signal and for directing the output from the composing means to the communication channel in response to a second control signal; and control means responsive to a complete composition of a digital burst of data information in the composing means for generating (a) said second control signal for transmission to both the switching means for directing the output from the composing means to the communication channel and the encoding means to initiate an interruption of the predetermined adaptive companding algorithm used by the encoding means, (b) third control signals to the composing means for directing the composed digital burst of data information to the switching means for transmission to the communication channel, and, after the digital burst of data information has been directed out of the composing means, (c) said first control signal to both the switching means for directing the digital pulse pattern from the encoding means to the communication channel, and the encoding means to terminate the interruption of the predetermined adaptive copanding algorithm thereof.
Claim 13
Dependent Claim
17 words
A digital transmitter according to claim 10 wherein the encoding means is an adaptive delta modulation coder.
Claim 14
Dependent Claim
47 words
A digital transmitter according to claim 11 wherein the transmitter further comprises: means for modulating the digital pulse pattern from the encoding means and a digital burst of data information in order to generate a representative output signal from the transmitter for transmission over the communication channel.
Claim 15
Dependent Claim
47 words
A digital transmitter according to claim 12 wherein the transmitter further comprises: means for encrypting both the digital pulse pattern from the encoding means and a digital burst of data information in accordance with a predetermined privacy code prior to the transmission thereof over the communication channel.
Claim 16
Dependent Claim
17 words
A digital transmitter according to claim 10 wherein the encoding means is an adaptive delta modulation coder.
Claim 17
Dependent Claim
47 words
A digital transmitter according to claim 10 wherein the transmitter further comprises: means for modulating the digital pulse pattern from the encoding means and a digital burst of data information in order to generate a representative output signal from the transmitter for transmission over the communication channel.
Claim 18
Dependent Claim
47 words
A digital transmitter according to claim 10 wherein the transmitter further comprises: means for encrypting both the digital pulse pattern from the encoding means and a digital burst of data information in accordance with a predetermined privacy code prior to the transmission thereof over a communication channel.
Claim 19
Dependent Claim
272 words
A digital receiver comprising: decoding means responsive to a digital pulse pattern received from a communication channel for decoding said digital pulse pattern into an analog output signal in accordance with a predetermined adaptive companding algorithm originally used in encoding said received digital pulse pattern; and a signaling interface comprising: means capable of detecting when a digital burst of data information is present in the received digital pulse pattern from the communication channel and detecting a unique arrangement of symbols within the received digital pulse pattern for identifying a digital burst of data information within said digital pulse pattern and generating a control signal in response to such detection, and means responsive to the detecting means detecting the presence of a digital burst of data information for interrupting the decoding means for a predetermined period of time and maintaining the predetermined adaptive companding algorithm used by the decoding means at the state found immediately prior to the interruption of the decoding means to permit the reception of a digital burst of data information, the interrupting means being responsive to the control signal form the detecting and generating means for generating (a) a first control signal to the decoding means to initiate an interruption of the predetemined adaptive companding algorithm used by the decoding means, (b) third control signals for accessing the portion of the detected digital burst of data information comprising data symbols to be received, and (c) a second control signal to the decoding means after the accessing of the data symbols to be received is complete to terminate said interruption of the predetermined adaptive companding algorithm of the decoding means.
Claim 20
Dependent Claim
272 words
A digital receiver comprising: decoding means responsive to a digital pulse pattern received from a communication channel for decoding said digital pulse pattern into an analog output signal in accordance with a predetermined adaptive companding algorithm originally used in encoding said received digital pulse pattern; and a signaling interface comprising: means capable of detecting when a digital burst of data information is present in the received digital pulse pattern from the communication channel and detecting a unique arrangement of symbols within the received digital pulse pattern for identifying a digital burst of data information within said digital pulse pattern and generating a control signal in response to such detection, and means responsive to the detecting means detecting the presence of a digital burst of data information for interrupting the decoding means for a predetermined period of time and maintaining the predetermined adaptive companding algorithm used by the decoding means at the state found immediately prior to the interruption of the decoding means to permit the reception of a digital burst of data information, the interrupting means being responsive to the control signal form the detecting and generating means for generating (a) a first control signal to the decoding means to initiate an interruption of the predetemined adaptive companding algorithm used by the decoding means, (b) third control signals for accessing the portion of the detected digital burst of data information comprising data symbols to be received, and (c) a second control signal to the decoding means after the accessing of the data symbols to be received is complete to terminate said interruption of the predetermined adaptive companding algorithm of the decoding means.
Claim 21
Dependent Claim
17 words
A digital receiver according to claim 17 wherein the decoding means comprises an adaptive delta modulation decoder.
Claim 22
Dependent Claim
43 words
A digital receiver according to claim 18 wherein the receiver further comprises: demodulating means responsive to a signal received from the communication channel for demodulating the received signal into a representative digital pulse pattern for transmission to the signaling interface and decoding means.
Claim 23
Dependent Claim
43 words
A digital receiver according to claim 19 wherein the receiver further comprises: means for decrypting a digital pulse pattern received from the communication channel in accordance with a same predetermined privacy code which was used to originally encrypt the received digital pulse pattern.
Claim 24
Dependent Claim
44 words
A digital receiver according to claim 17 wherein the receiver further comprises: demodulating means responsive to a signal received from the communication channel for demodulating the received signal into a representative digital pulse pattern for transmission to the signaling interface and the decoding means.
Claim 25
Dependent Claim
43 words
A digital receiver according to claim 17 wherein the receiver further comprises: means for decrypting a digital pulse pattern received from the communication channel in accordance with a same predetermined privacy code which was used to originally encrypt the received digital pulse pattern.
References Cited (Backward Citations)
US3420956A
Cited
US3549814A
Cited
US3898387A
Cited
US4059800A
Cited
US4053712A
Cited
US4110563A
Cited
US4167700A
Cited
EP0003009A2
Cited
US4354265A
Cited
US4271499A
Cited
US4208740A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |