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Method-and-arrangement-for-transmitting-voice-in-a-radio-system

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Method and arrangement for transmitting voice in a radio system

Details

Inventors: Schulz, Egon; Ritter, Gerhard;
Assignee: Siemens Aktiengesellschaft (Munich, DE)
Primary Examiner: Vo; Don N.
Assistant Examiner:
Attorney, Agent or Firm: Hill & Simpson

For transmitting voice between subscriber stations of a radio system, particularly a mobile radio telephone system, whereby an analog voice signal is digitally coded by voice frames (S), the voice frames (S) are first converted into voice-coded voice frames (S1). Subsequently, a plurality of these voice frames (S1) is combined to form a multi-voice frame (MSF1). These multi-voice frames (MSF1) are transmitted with error-protection. At the reception side, the multi-voice frames (MSF4) are in turn divided into voice-coded voice frames (S4) and, subsequently, the digital voice information contained in the transmitted voice frames is in turn converted into an analog voice signal.

DETAILED DESCRIPTION It is an object of the present invention to provide a method and an arrangement by which the delay time in the voice transmission is substantially reduced and existing mobile radio telephone systems need be only insignificantly modified.
The present invention is also based on the object of specifying a corresponding subscriber station and a corresponding central station.
The method and the arrangement of the present invention have the advantage that the voice quality is substantially improved.
They also have the advantage that an existing mobile radio telephone system can be used without substantial changes.
No changes whatsoever are required in the radio-frequency part.
Adaptations are merely required in the parts pertaining to the encodings.
In general terms the present invention is a method for the transmission of voice information between subscriber stations of a radio system.
Analog voice information is digitally coded by voice frames and the voice frames are converted into voice-coded voice frames.
These voice-coded voice frames are transmitted error-protected over at least one transmission channel.
Subsequently, the digital voice information contained in the transmitted voice frames is in turn converted into analog voice information after a voice decoding.
A plurality of voice-coded voice frames allocated to a subscriber are respectively combined at the transmission side to form a multi-voice frame.
The multi-voice frame is divided into voice-coded voice frames at the reception side.
Advantageous developments of the present invention are as follows.
The multi-voice frames are transmitted error-protected using unequally weighted error protection.
The transmission of the individual multi-voice frames ensues by division into a plurality of sub-blocks that are transmitted separately from one another.
The sub-blocks are transmitted encoded.
The plurality of voice frames combined to form a multi-voice frame is defined for at least one predetermined coverage area or transmission region

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