Control
Description
•
Joint stereo — Joint stereo is a special stereo format for MPEG-1
Layer II audio. In this mode the information about sound volume
difference among channels is coded as balance signal. Encoding
quality is some better than in stereo mode.
•
Stereo — Encoding in common stereo mode.
AAC profile
Selects the profile for AAC audio encoder. AAC profile restricts bitrate and the
number of encoded channels.
•
AAC LC — Bitrate is limited by 320 Kbps level.
•
HE AAC — encoding mode that is more effective than AAC LC.
Number of Channels
Allows user to select the number of audio channels to be encoded into output
stream, when Dolby Digital audio is decoded.
Stereo downmix mode
Specifies the downmix mode of Dolby Digital 5.1 stream to stereo format.
Bitrate
Specifies the audio stream bitrate. The range of available bitrates exists for
each format. Bitrate can be limited to assure file compatibility with different
hardware.
Resampling Frequency
Allows output audio resampling. The selection of the output frequency from
the frequencies list is available.
Level Correction
Allows correcting of audio signal level to remove waveform envelope
distortions of the input audio data. The following parameters must be set:
•
Level
– sets the required level of output signal (dB).
•
Gate
– sets the noise threshold (dB). All sounds with level below the
threshold are considered as noise.
•
Attack
– sets the response time to the signal level variation (ms).
•
Separate channels processing
– enables independent processing
of each channel.
5.10 Chapter Points
This feature allows adding key frames to the specified positions during encoding. For MPEG
format it is possible to playback a file only from I-frame (key frame). Therefore, in some cases a
key frame presence in encoded stream is required. The key frames insertion is supported only for
MPEG-2 encoding.
To add a chapter point select the required frame in the
Preview
window and click the
button
or press the STAR key ('*') on the numeric keypad. The
Add Chapter Points
window appears.
Figure 42.
Task Parameters – Add Chapter Points
Click
Add
or
Delete
to insert or remove a chapter point. The
Clear
button allows clearing the
whole list of added points. When chapter point is selected from the list, the corresponding frame is
displayed in the
Preview
window.
Elecard Converter Studio
50
User Guide
