Handset access of message in digital cordless telephone

• US 6,546,241 B2
• Filed: 11/02/1999
• Issued: 04/08/2003
• Est. Priority Date: 11/02/1999
• Status: Expired due to Term

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Agere Systems Incorporated (Broadcom, Inc.)
• Inventors: Iyengar, Vasu, Popa, James Charles, Ubowski, Richard M.
• Primary Examiner(s): Le, Thanh Cong
• Assistant Examiner(s): Harry, Andrew T
• Application Number:
  US09/431,853
• Publication Number:
  US 20020123326A1
• Time in Patent Office: 1,253 Days
• Field of Search: 455/413, 455/462, 455/412
• US Class Current: 455/412.1
• CPC Class Codes: H04M 1/6505 storing speech in digital form
• CPC Class Codes: H04M 1/724 User interfaces specially adapted for cordless or mobile telephones
• CPC Class Codes: H04W 4/12 Messaging; Mailboxes; Announcements
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

In one embodiment according to the invention, a digital cordless telephone includes a base unit adapted to couple to a telephone network, to transmit an outgoing message to an incoming caller, to store a digital message from the incoming caller, and to transmit and receive digital samples over an RF link. The digital cordless telephone of this embodiment also includes a handset adapted to transmit and receive digital samples over the RF link. According to this embodiment, the base unit and handset are further adapted to enable a user to monitor the stored digital message from the handset. In an alternative embodiment according to the invention, a method of accessing a digital message stored in one of a base unit and a handset of a cordless telephone from the other of the base unit and the handset includes the steps of transmitting a control signal from the accessing device to the storing device, retrieving the digital message, in encoded form, from a memory in the storing device, and transmitting at least a portion thereof to the accessing device. The method further includes the step of decoding the encoded digital message in the accessing device.

Claims

1. A digital cordless telephone, comprising:

a base unit adapted to couple to a telephone network, to transmit an outgoing message to an incoming caller, to store a digital message from the incoming caller, and to transmit and receive digital samples over an RE link; and

a handset adapted to transmit and receive digital samples over the RF link, said handset including a speech decoder adapted to decode speech coded data received over said RE link,

wherein the base unit and the handset are further adapted to enable a user to monitor the stored digital message from the handset.

2. A digital cordless telephone as recited in claim 1, wherein the digital message from the incoming caller is received as an analog signal, and wherein the base unit includes an analog-to-digital converter adapted to convert the analog signal to a digital signal, and a speech coder adapted to encode the digital signal for storage in a memory.

3. A digital cordless telephone as recited in claim 2, wherein the speech coder is a code excited linear predictive coder.

4. A digital cordless telephone as recited in claim 2, wherein the base unit includes a processor, and wherein the processor is adapted to respond to a control signal received from the RF link by retrieving speech coded data from the memory and transmitting the speech coded data over the RF link.

5. A digital cordless telephone, comprising:

a base unit adapted to couple to a telephone network, to transmit an outgoing message to an incoming caller, to store a digital message from the incoming caller, and to transmit and receive digital samples over an RF link; and

a handset adapted to transmit and receive digital samples over the RF link,

wherein the base unit and the handset are further adapted to enable a user to monitor the stored digital message from the handset,

wherein the digital message from the incoming caller is received as an analog signal, and wherein the base unit includes an analog-to-digital converter adapted to convert the analog signal to a digital signal, and a speech coder adapted to encode the digital signal for storage in a memory,

wherein the base unit includes a processor, and wherein the processor is adapted to respond to a control signal received from the RF link by retrieving speech coded data from the memory and transmitting the speech coded data over the RE link, and

wherein the handset includes a speech coder and a digital-to-analog converter, and wherein the speech coder is adapted to decode the speech coded data and the digital-to-analog converter is adapted to convert the decoded data to an analog signal for playing from a speaker element.

6. A method of accessing a digital message stored in one of a base unit and a handset of a cordless telephone from the other of the base unit and the handset, comprising:

transmitting a control signal from the accessing device to the storing device;

retrieving the digital message, in encoded form, from a memory in the storing device, and transmitting at least a portion thereof to the accessing device; and

decoding the encoded digital message in the accessing device.

7. A method as recited in claim 6, wherein the accessing device is the handset and the storing device is the base unit.

8. A method as recited in claim 6, wherein the accessing device is the base unit and the storing device is the handset.

9. A method as recited in claim 6, wherein the control signal is transmitted in response to activation of a keypad of the accessing device.

10. A method as recited in claim 6, wherein the digital message is stored in code excited linear predictive (CELP) form, and wherein the accessing device includes a CELP coder to perform the decoding step.

11. A method as recited in claim 6, further comprising the steps, in the storing device, of receiving an analog signal, converting the analog signal to a digital signal, and encoding the digital signal for storage.

12. A method as recited in claim 11, wherein the encoding step comprises code excited linear predictive encoding.

13. A cordless telephone, comprising:

a base unit, including;

an interface to a telephone network,

an analog-to-digital converter coupled to the interface,

a first speech coder having a first coding type coupled to the analog-to-digital converter,

a second speech coder having a second coding type coupled to the analog-to-digital converter,

an answering machine memory coupled to the first speech coder, and

a transceiver adapted to selectively transceive one of the first coding type data and the second coding type data; and

a handset, including;

a transceiver adapted to selectively transceive data encoded by the first speech coder and the second speech coder coded in the base unit,

a speech coder adapted to receive a speech coded digital signal from the answering machine memory of the base unit via an RE link, and to decode the speech coded digital signal,

a digital-to-analog converter adapted to convert the decoded digital signal from the speech coder in the handset to an analog signal, and

a speaker adapted to receive the analog signal and produce an audible signal.

14. The cordless telephone according to claim 13, wherein the first speech coder within the base unit utilizes code excited linear predictive (CELP) coding.

15. The cordless telephone according to claim 13, wherein the second speech coder within the base unit utilizes Adaptive Differential Pulse Code Modulated (ADPCM) coding.

16. The cordless telephone according to claim 13, wherein the answering machine memory is random access memory (RAM).

17. The cordless telephone according to claim 13, wherein the accessing device is the handset and the storing device is the base unit.