Method and arrangement for transmitting voice in a radio system

• US 6,069,920 A
• Filed: 09/30/1998
• Issued: 05/30/2000
• Est. Priority Date: 01/18/1994
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Schulz, Egon, Ritter, Gerhard
• Primary Examiner(s): VO, DON NGUYEN
• Application Number:
  US09/165,586
• Time in Patent Office: 608 Days
• Field of Search: 375/240, 375/241, 375/242, 341/87, 358/261.1, 358/426, 370/300, 370/474, 370/476, 370/477, 704/201, 704/208, 704/214, 704/500, 704/502, 704/503, 704/504, 714/752
• US Class Current: 375/242
• CPC Class Codes: H04B 1/66 for reducing bandwidth of signals; for improving efficiency of transmission H04B1/68 takes precedence
• CPC Class Codes: H04L 1/0059 Convolutional codes
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/007 Unequal error protection for format H04L1/0078; for codes per se H03M13/35

Abstract

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.

Claims

1. A method for transmission of voice information between subscriber stations of a radio system, comprising the steps of:

providing input analog voice information;

digitally encoding said analog voice information to produce input voice frames;

converting the input voice frames into first voice-coded voice frames;

combining a plurality of first voice-coded voice frames, that are allocated to a subscriber, to form a multi-voice frame;

error protection encoding said multi-voice frame;

dividing said multi-voice frame into a plurality of sub-blocks;

transmitting said sub-blocks separately from one another on at least one transmission channel;

receiving said sub-blocks from said at least one transmission channel;

reforming said multi-voice frame;

error protection decoding said multi-voice frame;

dividing the received multi-voice frame into second voice-coded voice frames;

digitally decoding said second voice-coded voice frames to produce output voice frames; and

converting digital information in the output voice frames into analog voice information;

wherein

determination of the plurality of voice frames combined to form a multi-voice frame ensues dependent on a level of quality of said at least one transmission channel in combination with the delay in transmission of the multi-voice frame.

2. The method according to claim 1, wherein the determination of the plurality of sub-blocks into which a multi-frame is divided ensues dependent on a level of quality of the transmission.