This is the bitstream above multiplexed with an explanatory graphic encoded in H.264 Main Profile at 800圆00 resolution. Missing tones in only one channel may indicate a speaker problem. This is at the encoded bitrate of 160 kb/s, at other bitrates the SBR crossover frequency used by the encoder will vary, resulting in more or less tones being heard. If the decoder is only decoding the AAC-LC portion of the bitstream, only the first two tones will be heard.
If the decoder supports SBR, all four tones, 6, 8, 10, and 12 KHz should be heard (or seen on a sound level meter if you have high-frequency hearing loss). The LFE signal is encoded 10 dB lower to account for the 10 dB gain in the LFE channel in the playback amplifer's bass management circuits. (Hold SLM next to subwoofer) If full-range speakers are used, the 60 Hz tones should play through each speaker individually, though levels may vary due to standing wave or resonances in the listening rrom. If a subwoofer is used with limited-range main speakers, all 60 Hz tones should play at the same level through the subwoofer. There is a 1 kHz -18 dBFS tone in the center channel throughout. SBR - 6, 8, 10, 12 kHz tones -18 dBFS, 0.5 seconds each.
Bass Management - 63 Hz tone -18 dBFS, 2 seconds.This tests for proper bass management and reproduction of the SBR portion of the HE-AAC bitstream. Note this is 320 kb/s, not 160 as announced.ĭownload File HE-AAC Channel ID - With H.264 Video This is the test above encoded in AAC-LC. EBU Multichannel Ident (EBU Tech 3304-4.2)Įrror: Source Statement Failure - Format not supported in this browser?.Spoken Channel Identification in English.
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