LEAD AAC Encoder/Decoder LEAD AAC Encoder/Decoder The LEAD AAC Encoder/Decoder implements Advanced Audio Coding (AAC), a new high quality compression standard used with MPEG4 or H264 ISO MP4 files. AAC is also the audio format that is used by and.

Key features of the LEAD AAC Encoder/Decoder: • Supports both variable and constant bitrates. • Supports selection of output channels. • Supports surround sound. • Supports both versions of AAC, MPEG4 and MPEG2. • Supports different profiles; Low Complexity profile, Main profile, and Long Term Prediction profile. • Supports 2 stream formats; Raw and ADTS. • Supports selection of output sample frequency.

Lead Aac Decoder Serial Numbers. Convert Lead Aac Decoder trail version to full software.

• Includes cutoff frequency option. • Includes a force stereo output option in the decoder.

User Interface: Options for the LEAD AAC Encoder/Decoder can be set manually through the encoder property page, which is shown in the following figure: Changes will be applied only when the filter's state is stopped with the ability to set them permanently by clicking Apply or OK, or to abandon changes by clicking Cancel. Damone Roll The Dice Megaupload. Positioning the mouse pointer over a control displays general information for that control.

If you are using the encoder with a third-party software package, refer to your software’s documentation for information on how to access the encoder’s property page(s). The following table shows the controls and their descriptions: Control Description The Format group Stream Format combo box The format of the output stream. Selecting “Raw” will cause the “MPEG Version” combo box contents to be restricted to “MPEG4” only. MPEG Version combo box The AAC audio MPEG version. If MPEG2 is selected, only the LC and MAIN object types will be listed in the “Object type” combo box. Object Type combo box The AAC profile used.

LC stands for Low Complexity; this option requires fewer CPU and Memory resources. The MAIN profile offers more efficiency at the expense of more resources. The Long Term Prediction profile, LTP, is suitable for speech and signals with clear pitch property.

The LTP option can be used with MPEG4 AAC only; “MPEG4” must be selected in the “MPEG4 Version” combo box. Block Type combo box The allowed block type; data window length.

The long block is usually 1024 samples, while the short block is usually 128 samples. “Normal” means both blocks are allowed. The Channels / Sample Rate group Input Channels text box Shows the number of input audio channels. If the input pin is not connected, the box will contain the text “Unknown”. Output Channels combo box The number of output channels.

You can choose between mono, stereo, and 6 channels, or you can leave the output channels the same as the input channels. If “6 channels” is selected, the “Simulate surround” check box will be enabled. Simulate Surround check box Enables disables surround feature simulation. It will simulate surround sound on 5.1 systems from a stereo or mono source.