LEAD AAC Encoder

The LEAD AAC Encoder Also known as compressor, this is a module or algorithm to compress data. Playing that data back requires a decompressor, or decoder. is a DirectShowÒ filter for compressing audio data using the AAC compression standard (ISO/IEC 13818-7). The AAC standard delivers high quality audio at lower bitrate compared to other audio encoding standards like ISO/MPEG Audio Layer-3; MP3.

This encoder offers both variable bitrate and constant bitrate. However, due to a limitation in the AVI multiplexer A module that combines audio and video into one file., the encoder offers constant bit rate only if it is connected to the AVI multiplexer.

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

 

Filter Interfaces

ILMAACEncoder,  ILMMCommon

Interface ID

IID_ILMAACEncoder

Input Media Types

Type:
MEDIATYPE_Audio
Subtypes:
MEDIASUBTYPE_PCM

Output Media Types

Type:

MEDIATYPE_Audio

Subtype:
MEDIASUBTYPE_LAAC (LEAD proprietary).
MEDIASUBTYPE_mp4a
MEDIASUBTYPE_AAC (format tag = 0xFF)

 

Filter CLSID

CLSID_LMAACEncoder

Property Page CLSID

CLSID_LMAACEncoderPropertyPage

Executable

LEncAAC.dll, DSKernel2.dll

Filter category

CLSID_AudioCompressorCategory

Header

ILEncAAC.h

Note: Media types are defined in the LGUIDs.h header file.

LEAD AAC Encoder User Interface

This filter is included as part of the following modules:

LEAD H.264 Video Encoder Module

LEAD MPEG-4 Video Encoder Module