Height Channel
An audio channel used to convey sound information located above the listener or above ear level, which can be reproduced by overhead, high-mounted wall, or upward-firing speakers.
Explanation
高度声道 is an audio channel intended for playback from above the listener or higher than the traditional ear plane. It adds a vertical dimension to the sound field and can carry overhead ambience, fly-over effects, spatial reflections, or concert hall height information. Advanced sound system specifications, such as ITU-R BS.2051, describe such layouts using layered speaker positions.
高度声道 can be a fixed channel or the output of object-based rendering. Fixed channels correspond to specific overhead or high-level speakers during production; object-based programs store positional metadata, and the renderer then generates multiple height outputs based on the equipment. The player displays four height speakers, but this does not imply that the bitstream contains only four audio objects.
Home systems may use ceiling speakers, speakers mounted high on walls, or modules that project sound toward the ceiling and utilize reflections to reach the listener. The geometry and frequency response conditions differ among these three methods, but they are often included in the third segment of the layout number—for example, the `.2` in 5.1.2.
Early “front height” or “width” extensions do not necessarily use the same positions as the overhead layouts in Dolby Atmos and DTS:X. Similar names do not guarantee channel mapping compatibility; installation and mastering should be based on the specific angles and labels of each format.