CC2564MODACMOG.B datasheet(26/68 Pages) TI2

26 / 68 page

CC2564MODN, CC2564MODA

SWRS160E – FEBRUARY 2014 – REVISED JANUARY 2017

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Detailed Description

5.9.1

Assisted HFP 1.6 (WBS)

The HFP 1.6 Profile Specification adds the requirement for WBS support. The WBS feature allows twice

the voice quality versus legacy voice coding schemes at the same air bandwidth (64 kbps). This feature is

achieved using a voice sampling rate of 16 kHz, a modified subband coding (mSBC) scheme, and a

packet loss concealment (PLC) algorithm. The mSBC scheme is a modified version of the mandatory

audio coding scheme used in the A2DP profile with the parameters listed in Table 5-3.

Table 5-3. mSBC Parameters

PARAMETER

VALUE

Channel mode

Mono

Sampling rate

16 kHz

Allocation method

Loudness

Subbands

Block length

Bitpool

The assisted HFP 1.6 mode of operation implements this WBS feature on the embedded coprocessor.

That is, the mSBC voice coding scheme and the PLC algorithm are executed in the coprocessor rather

than in the host, thus minimizing host processing and power. One WBS connection at a time is supported

and WBS and NBS connections cannot be used simultaneously in this mode of operation. Figure 5-9

shows the architecture comparison between the common implementation of the HFP 1.6 profile and the

assisted HFP 1.6 solution.

Figure 5-9. HFP 1.6 Architecture Versus Assisted HFP 1.6 Architecture

CC2564MODACMOG.B Datasheet(PDF) 26 Page - Texas Instruments