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

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 ILMAC3Encoder interface.

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

Component Description
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/LEncAC3Krn.dll (Win32), LEncAC3x.dll/LEncAC3Krnx.dll (x64), DSKernel2.dll
Filter Category CLSID_AudioCompressorCategory
Header ILEncAC3.h

Comments

This filter is included as part of the following modules:

Platforms

Win32, x64.

See Also

LEAD AC3 Encoder User Interface

Help Version 22.0.2022.4.7
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2022 LEAD Technologies, Inc. All Rights Reserved.

LEADTOOLS Filters C API Help

Products | Support | Contact Us | Intellectual Property Notices
© 1991-2022 LEAD Technologies, Inc. All Rights Reserved.