The embodiments disclosed provide a manner of transmitting voice information
that strikes an improved balance between voice quality and RF capacity in a CDMA
dispatch environment. In general, two half-rate vocoder frames (201 and
202) are assembled into a single full rate transmit frame (200) to
enable the transmission of alternating full-rate frames. Additionally, an individual
CRC (203 and 204) is provided for each half-rate frame within the
transmit frame to allow for partial recovery when frame corruption or erasure occurs.
In this manner, system capacity is improved, particularly in the CDMA dispatch
environment, while preserving voice quality.
