STA310 datasheet(25/90 Pages) STMICROELECTRONICS

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STA310

4.10 What Can Be Processed at the Same Time

Same Time 1

Same Time 2

PCM OUTPUT CONFIGURATIONS

5.1 Output configurations

The figure below shows the different configurations supported at PCM output stage. They are selected by the

OCFG register contents.

- In configuration 1, 3 and 4, the main channels are attenuated by 18.5dB, and the LFE by 8.5dB before

summing.

After digital/analog conversion, the subwoofer preamplifier has to compensate for the different gains

of the main channels and subwoofer.

- In configuration 2, the main channels are attenuated by 16dB and the LFE by 6dB before processing.

- In configuration 0, outputs are only scaled and rounded (see next section).

The same configurations will be used in case of a decoded Pro Logic program with the exception that the sur-

round channels will not be added to the bass redirection (the surround channels of a Pro Logic program are

band limited and bass is considered as leakage).

Decoder

MPEG1

MP3

AC3

MPEG2

LPCM Video

PCM

MLP

LPCM Audio

PinkNoise

Beep Tone

Post

Pcrocessing

Bass

Management

Commands

Mute

Skipframe

Pause

Pause block

Volume Control

S/PdifOutput

PCM (Left

,Right

PCM (VCRs)

Encoded

Mute

Off

Post

Pcrocessing

Prologic

Post

Pcrocessing

Karaoke

Channel Delay

Post

Pcrocessing

Karaoke

Channel Delay

Post

Pcrocessing

Karaoke

Channel Delay

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