Method for cellular text telephone modem operation with sampling rate conversion and machine readable medium

• US 9,979,831 B2
• Filed: 09/07/2015
• Issued: 05/22/2018
• Est. Priority Date: 03/30/2015
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Chen, Ting-Ni, Ju, Fu-Shing, Lin, Chih-Ping, Chen, Yu-Hsin
• Primary Examiner(s): VO, NGUYEN THANH
• Application Number:
  US14/846,846
• Publication Number:
  US 20160295024A1
• Time in Patent Office: 988 Days
• CPC Class Codes: H04L 1/0014 by adapting the source coding
• CPC Class Codes: H04M 1/72478 for hearing-impaired users
• CPC Class Codes: H04M 11/066 Telephone sets adapted for data transmision
• CPC Class Codes: H04M 3/42382 Text-based messaging services in telephone networks such as PSTN/ISDN, e.g. User-to-User Signalling or Short Message Service for fixed networks
• CPC Class Codes: H04M 3/42391 where the subscribers are hearing-impaired persons, e.g. telephone devices for the deaf
• CPC Class Codes: H04W 4/18 Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals

Abstract

A method for Cellular Text Telephone Modem (CTM) signal transmission includes: converting a CTM transmitter signal carried in a first sampling rate to generate a transmission signal carried in a second sampling rate, wherein the second sampling rate is different from the first sampling rate; and outputting the transmission signal carried in the second sampling rate to a CTM receiver.

Claims

1. A method for Cellular Text Telephone Modem (CTM) signal transmission, comprising:

converting, by a processor implementing a CTM function, a CTM transmitter signal carried in a first sampling rate to generate a transmission signal carried in a second sampling rate, wherein the second sampling rate is different from the first sampling rate;

outputting, by the processor, the transmission signal carried in the second sampling rate;

converting, by the processor, an input signal carried in a third sampling rate to generate a converted signal carried in the first sampling rate, wherein the third sampling rate is different from the first sampling rate; and

processing, by the processor, the converted signal carried in the first sampling rate to generate the CTM transmitter signal carried in the first sampling rate.

2. The method of claim 1, wherein the third sampling rate is equal to the second sampling rate.

3. The method of claim 1, wherein the input signal is a speech signal or a text telephone signal.

4. The method of claim 1, wherein the second sampling rate and the third sampling rate are determined by a base station.

5. A method for Cellular Text Telephone Modem (CTM) signal reception, comprising:

receiving, by a processor implementing a CTM function, a transmission signal carried in a second sampling rate frequency;

converting, by the processor, the transmission signal carried in the second sampling rate to generate a CTM receiver signal carried in a first sampling rate, wherein the first sampling rate is different from the second sampling rate;

processing, by the processor, the CTM receiver signal carried in the first sampling rate to generate a processed signal carried in the first sampling rate; and

converting, by the processor, the processed signal carried in the first sampling rate to generate an output signal carried in a third sampling rate.

6. The method of claim 5, wherein the third sampling rate is equal to the second sampling rate.

7. The method of claim 5, wherein the output signal is a speech signal or a text telephone signal.

8. The method of claim 5, wherein the second sampling rate and the third sampling rate are determined by a base station.

9. A non-transitory machine-readable medium having a program code stored therein, wherein when executed by a processor, the program code instructs the processor to perform the following steps:

converting, by the processor implementing a Cellular Text Telephone Modem (CTM) function, a CTM transmitter signal carried in a first sampling rate to generate a transmission signal carried in a second sampling rate, wherein the second sampling rate is different from the first sampling rate;

outputting, by the processor, the transmission signal carried in the second sampling rate;

converting, by the processor, an input signal carried in a third sampling rate to generate a converted signal carried in the first sampling rate, wherein the third sampling rate is different from the first sampling rate; and

processing, by the processor, the converted signal carried in the first sampling rate to generate the CTM transmitter signal carried in the first sampling rate.

10. The non-transitory machine-readable medium of claim 9, wherein the third sampling rate is equal to the second sampling rate.

11. The non-transitory machine-readable medium of claim 9, wherein the input signal is a speech signal or a text telephone signal.

12. The non-transitory machine-readable medium of claim 9, wherein the second sampling rate and the third sampling rate are determined by a base station.

13. A non-transitory machine-readable medium having a program code stored therein, wherein when executed by a processor, the program code instructs the processor to perform the following steps:

receiving, by the processor implementing a Cellular Text Telephone Modem (CTM) function, a transmission signal carried in a second sampling rate frequency from a CTM transmitter;

converting, by the processor, the transmission signal carried in the second sampling rate to generate a CTM receiver signal carried in a first sampling rate, wherein the first sampling rate is different from the second sampling rate;

processing, by the processor, the CTM receiver signal carried in the first sampling rate to generate a processed signal carried in the first sampling rate; and

converting, by the processor, the processed signal carried in the first sampling rate to generate an output signal carried in a third sampling rate.

14. The non-transitory machine-readable medium of claim 13, wherein the third sampling rate is equal to the second sampling rate.

15. The non-transitory machine-readable medium of claim 13, wherein the output signal is a speech signal or a text telephone signal.

16. The non-transitory machine-readable medium of claim 13, wherein the second sampling rate and the third sampling rate are determined by a base station.