LEAD AC3 Encoder

The LEAD AC3 Audio Encoder Filter is a DirectShow® filter for compressing  audio data using the AC3 compression standard (A/52 - Digital Audio Compression Standard (AC-3)). AC3 is the sound format for digital television ( DTV), digital versatile discs (DVDs), high definition television (HDTV), and digital cable and satellite transmissions. AC3 is a 5.1 format, which means that it provides five full-bandwidth channels, front left, front right, center, surround left, and surround right. A low-frequency effect ( LFE) channel is included for the sound needed for special effects and action sequences in movies. AC3 also has a downmixing feature that ensures compatibility with devices that do not support the 5.1 format.

Key features of the LEAD AC3 Audio Encoder:

You can use the encoder with your existing converter or DVD creator application, if it allows you to select the audio encoder. The AC3 encoder supports unchanged audio input, Force Mono, Force Stereo or Force 6 Channels. This audio encoder is needed in order to create DVDs that have 5.1-channel surround sound.

The compression option for the LEAD AC3 encoder can be set manually through the encoder property page. The compression option can also be set programmatically using the ILMAC3Encoderinterface.

Technical details for the filter are provided in the following table:

Filter Interfaces

ILMAC3Encoder, ILMMCommon

Interface ID

IID_ILMAC3Encoder

Input Media Types

Type:
MEDIATYPE_Audio
Subtypes:
MEDIASUBTYPE_WAVE
MEDIASUBTYPE_PCM

Output Media Types

Type:
MEDIATYPE_Audio
Subtype:
MEDIASUBTYPE_DOLBY_AC3

Filter CLSID

CLSID_LMAC3Encoder

Property Page CLSID

CLSID_LMAC3EncoderPropertyPage

Executable

LEncAC3.dll, DSKernel2.dll

Filter category

CLSID_AudioCompressorCategory

Header

ILEncAC3.h

Platforms

Win32, x64

This filter is included as part of the following modules:

LEADTOOLS DVD Module

LEAD MPEG-2 Video Encoder Module

LEAD MPEG-2 Video Codec Module

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