Sony Grand WEGA KDF-E55A20 Operating Instructions Manual page 51

The Program Guide allows you to select the channels from a drop down list.
The Guide also provides information about the cunent program being shown
on each channel.
/_ Subchannels are additional channels of programming broadcast
simultaneously. For example,channel 4 might include three subchannels
(4.1,4.2, 4.3) that are showing programs at the same time.
The Prograln Options menu allows you to customize the program settings on
the currently tuned channel.
Each program has a main video stream (the video that you see when
the channel is first tuned), and may have alternate video streams. This
(When
option allows yon to switch among these alternate video streams.
available)
Each program has a main audio stream (the audio you hear when the
channel is first tuned). This option allows you to switch among these
(When alternate audio strealns (e.g., for different langnages).
available)
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