LHDC earphone test method and system

Abstract

The invention provides an LHDC earphone test method and system. The method comprises the following steps: setting the maximum length of an audio data frame; conducting lHDC coding on the wav format audio file to generate an LHDC coding file, wherein the LHDC coding file comprises a plurality of audio data frames; re-typesetting the LHDC coding file to obtain LHDC original data; performing dynamic packing on the LHDC original data to obtain a plurality of AVDTP audio media packets conforming to an AVDTP protocol; calculating the sending time node of the next AVDTP audio media packet according to the audio time of each AVDTP audio media packet, the total audio time of the sent AVDTP audio media packets and the sending time node of the current AVDTP audio media packet; reading a next AVDTP audio media packet, and temporarily sending the next AVDTP audio media packet to a Bluetooth test control panel at a sending time node of the next AVDTP audio media packet; sending the time node for dynamic compensation; sending audio media data to the earphone for playing by the AVDTP protocol stack, and by an audio collector,recording sound played by the earphone and sending the sound to the client software for audio analysis.

Description

technical field [0001] The invention relates to an earphone testing method, in particular to an LHDC earphone testing method and system. Background technique [0002] LHDC (Low-Latency High-Definition audio Codec, low-latency high-definition audio codec), as a low-latency high-quality audio coding technology, its data transmission can reach up to 900kbps, which is close to the conventional audio codec SBC (sub band code) (328kbps) 3 times. Its audio delay of 80ms is only one-fifth of SBC (400ms). [0003] At present, there are more and more headphone brands supporting LHDC in the market, but so far there is no perfect LHDC headphone performance and sound quality test, and the traditional headphone test methods are mostly used to test SBC codec headphones, for LHDC codec Headphones are not suitable. For headphones, the SBC encoding can only reach 48KHZ at most, and the test can only measure the frequency response below 24KHZ. LHDC can currently transmit 96KHZ sampling fre...

AI Technical Summary

Problems solved by technology

[0004] Due to the relatively new LHDC encoding technology, the LHDC headphone test solution is not perfect, mainly because the PC (computer) does not support this audio protocol, and LHDC has high requirements for the timing of data downlink, and the real-time performance of the PC side cannot keep up. Communication requirements, so most of them use mobile phones or embedded devices to connect to LHDC earphones and play specified audio for testing. This test method is limited by mobile phones (not all brands support LHDC, and a mobile phone can only connect to one earphone). Its testing technology is difficult, the threshold for employees is high, the efficiency is low, the cost is high, and it takes a long time

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