PNX1501E NXP Semiconductors, PNX1501E Datasheet - Page 91

• Manufacturer Part Number: PNX1501E
• Description: Digital Signal Processors & Controllers (DSP, DSC) MEDIA PROCESSOR PNX15XX/266MHZ
• Manufacturer: NXP Semiconductors

Specifications of PNX1501E

• Product: DSPs
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOT-795
• Minimum Operating Temperature: 0 C
• Lead Free Status / Rohs Status: Details
• Other names: PNX1501E,557

Philips Semiconductors
Volume 1 of 1
8. Audio processing and Input/Output
12NC 9397 750 14321
Product data sheet
7.5.1 External Video Improvement Post Processing
8.1 Audio Processing
8.2 Audio Inputs and Outputs
QVCP shares its allocated pins with the FGPO module through an output router.
Refer to
allocation.
The PNX15xx Series has a ‘VDO_AUX’ output pin that can be set to signal whether a
pixel is a graphics or video pixel. This can be used to suppress post-processing on
graphics elements for an attached proprietary video improvement post processor.
Motion vectors computed by TM3260 software can be sent to a video improvement
post-processor over the PCI interface.
The function of VDO_AUX is programmed using the QVCP capability to combine
alpha or chroma-keying information during blending. For example, chroma keys in a
graphics plane could be used to drive VDO_AUX. For another example, a threshold
value for an alpha value of a graphics plane could be used to indicate whether a pixel
is more than 80% video.
All audio processing in PNX15xx Series is performed in software on the TM3260.
This includes decoding of audio from compressed formats, sample rate conversion,
mixing and special effects processing. There is sufficient performance, if required, to
transcode received audio to multi-channel compressed audio sent over S/PDIF to an
attached receiver.
The PNX15xx Series has several Audio Input/Output facilities:
•
•
•
PNX15xx Series Audio In can capture up to 8 stereo audio inputs with up to 32-
bit/sample precision at sample rates up to 96 kHz. Both Audio In and Audio Out
support most A/D converter serial protocols, including I
internally or externally generated. The internal generator is programmable with
sub one Hertz sampling rate accuracy. Audio In also includes a raw mode which
allows the capture of any quantity of bits out of the programmable frame (up to
512 bits per frame). The word strobe (AI_WS pin) is also captured and stored into
memory.
PNX15xx Series Audio Out can generate up to 8 channels of audio, and directly
drives up to 4 external stereo I
bit/sample precision at sample rates up to 96 kHz. The sample rate can be
internally or externally generated. The internal generator is programmable with
sub one Hertz sampling rate accuracy. Audio out does not include a raw mode as
the Audio In module does.
PNX15xx Series supports a SPDIF (Sony Philips Digital Interface) output with
IEC-1937 capabilities. Transmitted data is generated by TM3260 software. This
output port can carry either stereo PCM samples from an internal audio mix, or
Section 9.
Rev. 2 — 1 December 2004
(should this say “from an attached receiver” ?)
for the different operating modes of QVCP and FGPO and pin
2
S or similar D/A converters. It supports up to 32-
© Koninklijke Philips Electronics N.V. 2002-2003-2004. All rights reserved.
PNX15xx Series
2
S. Sample rate is
Chapter 2: Overview
2-17