Analog/digital data storage system
First Claim
1. A digital voice storage communication system including:
- at least one transmitting station selectively addressing and transmitting a communication packet including an address code followed by a voice message;
at least two receiving stations having a corresponding predetermined stored address, each comprising;
a. a receiver circuit for receiving an incoming signal carrying said communication packet;
b. decoder circuitry responsive to said receiver circuit for emitting a record enable signal responsive to said communication packet carried by said incoming signal, including;
a comparator for comparing said predetermined stored address with said communication packet address code and automatically generating said record enable signal in response to said comparison, without reference to a separate record enable signal from said transmitter;
c. digital memory for storing said voice message of said communication packet in response to said record enable signal;
d. signal conversion circuitry for converting digital data in said digital memory into analog data for playback.
4 Assignments
0 Petitions
Accused Products
Abstract
An analog to digital data storage system includes receiver means for receiving an incoming signal carrying an analog component from a suitable transmitter. The analog signal is preferably preceded by a designated address code which is specific to a particular data storage system. The system further includes enable means activated by the incoming signal to emit an enable signal (logic high) to activate the system circuitry. The enable means may comprise a decoder which has been programmed to recognize an address code specified to a particular receiver or group of receivers or may be activated simply by the incoming signal without an address code, to emit the enable signal. The system also includes conversion means for converting the incoming analog data to digital format and memory means for storing the converted digital data. The conversion means further includes circuitry for reconverting a digital signal to analog format. Control means are provided for activating the conversion means and the digital memory storage means responsive to the enable signal from the decoder means. In the preferred embodiment, the control means also acts to deactivate the conversion means and memory means at the completion of the message or after a predetermined period of time. Switching means are included for activating the conversion means and the memory means for playback in analog format of any stored messages. the system further includes amplifier means for listening to incoming analog signals and playback of stored messages.
94 Citations
41 Claims
-
1. A digital voice storage communication system including:
-
at least one transmitting station selectively addressing and transmitting a communication packet including an address code followed by a voice message; at least two receiving stations having a corresponding predetermined stored address, each comprising; a. a receiver circuit for receiving an incoming signal carrying said communication packet; b. decoder circuitry responsive to said receiver circuit for emitting a record enable signal responsive to said communication packet carried by said incoming signal, including; a comparator for comparing said predetermined stored address with said communication packet address code and automatically generating said record enable signal in response to said comparison, without reference to a separate record enable signal from said transmitter; c. digital memory for storing said voice message of said communication packet in response to said record enable signal; d. signal conversion circuitry for converting digital data in said digital memory into analog data for playback. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A digital voice storage communication system including:
-
at least one transmitting station selectively addressing and transmitting a communication packet including an address code followed by a voice message; at least two receiving stations each having a corresponding predetermined stored address, each comprising; a receiving circuit responsive to said communication packet; a decoder connected to said receiving circuit and generating a record enable signal in response to said communication packet; a digital memory for storing said voice message of said communication packet in response to said record enable signal at a first data rate; a signal conversion circuit for converting digital data into analog data, and a timing circuit for clocking data representing said stored voice message from said digital memory at a second data rate which is different from said first data rate. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
-
-
39. A receiving station for receiving a communication packet including an address code followed by a compressed voice message, comprising:
-
a register storing a predetermined address for said receiving station; a receiving circuit responsive to said communication packet; a decoder connected to said receiving circuit for comparing said predetermined stored address with said communication packet address code and generating a record enable signal in response to said comparison; a digital memory for storing said compressed voice message of said communication packet in response to said record enable signal at a first data rate; a signal conversion circuit for converting digital data into analog data, and a timing circuit for clocking data representing said stored compressed voice message from said digital memory at a second data rate which is slower than said first data rate to restore said voice message to its original frequency.
-
-
40. A receiver for receiving voice messages from a transmitter, the voice messages having been compressed at said transmitter thereby shifting their frequency upward, comprising:
-
a receiving circuit for receiving said compressed voice messages; a digital memory connected to said receiving circuit, said digital memory storing digital data representing said compressed voice messages; and a frequency shifting circuit connected to said memory for reproducing said stored voice messages in analog format at a rate which shifts the frequency of said stored voice messages to normal speech frequency.
-
-
41. A method of receiving a communication packet including an address code followed by a compressed voice message, comprising the steps of:
-
comparing said address code in said communication packet with a stored address and generating a record enable signal; and recording digital data representing said voice message in a digital memory in response to said record enable signal alone.
-
Specification