In today's digital age, the on-board hands-free communication system has become an important tool for driving safety and convenient communication. However, the complex in-car acoustic environment, such as low signal-to-noise ratio, echo, dual-speech interference, and RF transmission damage, poses great challenges to achieve high-quality hands-free voice communication. In order to ensure that the voice quality of the vehicle hands-free communication system meets high standards, the International Telecommunication Union (ITU) issued the ITU-TP. 1110 proposal, which sets clear specifications and requirements for the voice quality test of broadband hands-free communication.
1. Core content of the P.1110 standard
The ITU-TP. 1110 focuses on voice quality testing for on-board hands-free communication systems, covering multiple key metrics. These indicators include frequency response and loudness level in single lecture, echo performance and level change in single and double lecture, and transmission quality of background noise. The standard comprehensively evaluates the performance of voice communication systems under different driving conditions through a range of advanced test methods, ensuring that users can have a clear, natural, and non-interference-free voice experience when using the hands-free feature.
2、P.1110 three core advantages
1）Advanced test configuration
The P.1110 combines high-performance hardware and software to support multiple test configurations. For example, for vehicles equipped with A²B ® bus system, the bus can be directly accessed through the labCORE hardware platform to realize real-time digital insertion of background noise during the measurement process, thus omitting the traditional background noise simulation system. This configuration not only improves the test efficiency, but also ensures the accuracy and reliability of the test results.
2）Real test scenario simulation
In order to simulate the real driving environment, the ACQUA P.1110 standard uses the artificial head (HATS) technology to simulate the driver or passenger using the hands-free terminal. Vehicle-specific acoustic conditions are fully considered by taking measurements in the vehicle cockpit. In addition, real vehicle driving noise will be used as the background noise source, and different speed and ventilation settings will be used to cover various actual driving scenarios. This close-to-real test scenario setting enables the test results to better reflect the performance of the hands-free system in actual use.
3）Comprehensive test signal and analysis
ACQUA P.1110 standard covers a variety of test signals, including real speech, compound source signal (CSS), activation sequence, special noise sequence and speech sequence. These test signals provide a comprehensive assessment of the voice quality of the hands-free system under different conditions, such as speech clarity and echo suppression in dual-speech situations (i. e., the driver and the other party speak at the same time). Through these detailed tests and analysis, automakers can optimize their hands-free systems to improve the overall quality of voice communications.
3、Application value of the P.1110 test
1）Help the auto makers
For automakers, the P.1110 test standard is a key tool to ensure that their products stand out in the fierce market competition. By adopting the ACQUA P.1110 standard, manufacturers are able to comprehensively develop and optimize the vehicle's hands-free communication system to provide a superior voice communication experience for consumers. This not only helps to enhance the brand image, but also enhances users' satisfaction and loyalty to the vehicle.
2）Promote the industry's technological progress
From the perspective of the entire automobile industry, the promotion and application of ITU-TP. 1110 standard has promoted the continuous progress of hands-free communication technology. As more and more automobile manufacturers and suppliers adopt this standard, the voice quality of hands-free communication systems will be significantly improved, laying a solid foundation for the future development of intelligent transportation and autonomous driving technologies.
On the road of pursuing the ultimate voice communication experience, ITU-TP. 1110 voice quality test standard undoubtedly sets a new benchmark for the field of hands-free communication. Whether during daily commuting or long trips, users will enjoy clear and natural voice communication, making every driving more relaxed and enjoyable.
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