Communication device and method of operation

DETAILED DESCRIPTION OF EMBODIMENTS Embodiments of the present invention are described below, by way of example only.
The block diagrams illustrate functional blocks and their principle interconnections and should not be mistaken for illustrating specific implementations of the present invention.
FIG.
1 illustrates an exemplary block diagram of a communication device 100 in accordance with a first embodiment of the present invention.
A microphone 101 is connected to an input of an analog-to-digital, A/D, converter 102.
The output of the A/D converter is connected to an input of a speech encoder, SPE, 103.
The output of the speech encoder is connected to the input of a frame decimation block, FDEC, 104 and to a transmitter input, Tx/I, of a signal processing unit, SPU, 105.
A transmitter output, Tx/0, of the signal processing unit is connected to a transmitter, Tx, 106, and the output of the transmitter is connected to an antenna, 107, constituting a radio air interface.
The antenna is also connected to the input of a receiver, Rx, 108, and the output of the receiver is connected to a receiver input, Rx/I, of the signal processing unit 105.
A receiver output Rx/O of the signal processing unit 105 is connected to an input of a speech decoder, SPD, 110.
The input of the speech decoder 110 is also connected to an output of a frame interpolation block, FINT, 109.
The output of the speech decoder is connected to an input of a post-filtering block, PF, 111.
The output of the post-filtering block is connected to an input of a digital-to-analog, D/A, converter, 112.
The output of the D/A converter is connected to a loudspeaker 113.
Preferably, the SPE, FDEC, FINT, SPD and PF are implemented by means of a digital signal processor, DSP, 114 as is illustrated by the broken line in FIG.
1.
If a high degree of integration is desired, the A/D converter, the D/A converter and the SPU may also be implemented by means of the DSP.
It should be understood that the elements implemented by means of the DSP may be realized as software routines run by the DSP