Method for transmitting items of speech information

• US 5,953,694 A
• Filed: 07/17/1997
• Issued: 09/14/1999
• Est. Priority Date: 01/19/1995
• Status: Expired due to Term

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Pillekamp, Klaus-Dieter
• Primary Examiner(s): Dorvil, Richemond
• Application Number:
  US08/875,120
• Time in Patent Office: 789 Days
• Field of Search: 704/214, 704/221, 704/222, 704/200, 704/201, 704/223, 704/229, 704/207, 704/219, 704/226, 704/227, 704/228, 704/270, 370/310, 370/332, 370/342, 370/464, 370/468
• US Class Current: 704/201
• CPC Class Codes: H04B 7/24 for communication between two or more posts wireless communication networks H04W
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Method for transmitting speech information (si) between a transmission apparatus (S) and a reception apparatus (E) via at least one radio channel (F), in which the transmission quality is increased by determining, in the transmission apparatus (S), speech pauses (sp) within the speech information, producing an item of control information (st) that represents the time position of the speech pauses (sp) within the speech information (si), and sending these suitably with respect to time via the radio channel (F)in addition to the speech information (si), and by evaluating the control information (st) in the terminal apparatus (E) in such a way that the speech pauses (sp) are correctly inserted with respect to time into the speech information (si). The method is particularly suited for the digital transmission of items of speech information (si) in wireless communication systems according to the DECT standard.

Claims

1. A method for transmitting items of speech imformation between a transmission apparatus, having an arithmetic logic unit and radio part, and a reception apparatus, having a radio part, an arithmetic logic unit and an electric-acoustic transducer, via at least one radio channel, comprising the steps of:

determining in the transmission apparatus, speech pauses within the speech information;

producing an item of control information representing a time position of the speech pauses within the speech information;

transmitting in addition to the speech information, the control information with respect to time via the radio channel by the radio part of the transmission apparatus; and

evaluating the control information in the reception apparatus such that the speech pause are inserted correctly with respect to time into the speech information that is received by the radio part at the reception apparatus.

2. The method according to claim 1, wherein in the transmission apparatus, during the determination of the speech pauses, a duration thereof is compared with a frame length of a frame clock, and wherein the control information is produced only if a respective speech pause is longer than the frame length.

3. The method according to claim 1, wherein for the correct insertion with respect to time of the speech pauses into the received speech information, the arithmetic logic unit allocated to the reception apparatus interrupts a current supply of a digital to analog converter for a duration of the speech pauses.

4. The method according to claim 1, wherein for the correct insertion with respect to time of the speech pauses into the speech information, the arithmetic logic unit allocated to the reception apparatus causes a noise signal produced in a signal generator to be supplied to an electric-acoustic transducer.

5. The method according to claim 1, wherein the transmission of the speech information and of the control information ensues in digitized form via the radio channel.

6. The method according to clam 1, wherein the control information is inserted into a transmission protocol for transmission of the speech information such that during a communication of a further transmission apparatus without a device for producing the control information or of a further reception apparatus without a device for evaluation of the control information, only the speech information, including the speech pauses contained therein, is supplied to an electric-acoustic transducer of the reception apparatus.

7. A transmission apparatus for transmtting speech information, comprising:

an arithmetic logic unit operatively connected to a radio part;

speech pause recognition device for recongnizing speech pauses located in the speech information;

the speech pause recognition device and the arithmetic logic unit producing time position of the speech pauses within control information representing the speech information;

device for forming transmission signals such that the control information is transmitted with respect to time by the radio part, in addition to the speech information, via the radio channel.

8. A reception apparatus for receiving speech infomation and control information, the speech information having speech pauses, and the control information having information regarding time position of the speech pauses in the speech information, compromising:

a radio part operatively connected to an arithmetic logic unit, a digital to analog converter and an electric-acoustic transducer;

a system structured such that the control information is evaluated in the arithmetic logic unit and the speech pauses are inserted correctly with respect to time into the speech information.