科大讯飞语音识别API规范与样本使用

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"语音识别技术通常需要特定格式的音频输入,例如WAV格式,以便于处理和转换成文字。科大讯飞的语义开放平台提供了API规范文档,详细描述了如何与他们的服务进行交互。这个平台可能涉及到语音识别、自然语言理解和相关知识产权的使用。文档强调了对内容的复制和传播的限制,同时也提醒用户需同意最终用户许可协议(EULA)才能使用产品。在API规范中,涵盖了各种消息格式和响应结构,包括应答码、错误定义、语义结构化表示以及不同的数据表示方式,如HTML5页面和简化图文结果。此外,文档还介绍了通用功能协议,如地点描述相关协议,用于处理行政区划、道路、交叉路口和区域等位置信息。" 这篇摘要主要涵盖了以下几个知识点: 1. **音频格式要求**:在语音识别技术中,特别是针对某些SDK,如科大讯飞的,需要音频以WAV格式提交,这是由于该格式的无损特性有利于语音处理。 2. **语义开放平台API**:科大讯飞提供了一个API接口,允许开发者通过规定的协议进行语音识别和其他自然语言处理任务,如地点描述等。 3. **API规范**:文档详细规定了应答消息的格式和字段定义,包括应答码(用于标识请求的成功或失败)、错误定义(帮助开发者理解并解决可能出现的问题)、语义结构化表示(将非结构化的语音数据转化为结构化的信息)和数据表示方式(如HTML5页面和简化图文结果)。 4. **法律与许可**:科大讯飞对其知识产权有严格的保护,文档的使用、复制和分发需要遵循特定的条款,且使用产品意味着同意EULA。 5. **地点描述协议**:平台提供了处理地理位置信息的协议,能够处理不同类型的地点描述,如基础地点(行政区划)、道路、交叉路口和区域等,这可能用于导航、位置查询等相关应用。 这些知识点对于进行语音识别应用开发和使用科大讯飞的语义开放平台是非常重要的,开发者需要理解这些规范来有效地集成和利用其服务。
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很有用的噪声库,可进行语音信号处理的离线仿真测试等 File: Matlab or WAV formats (compressed) sampling rate: 19.98 KHz A/D: 16 bit pre-filter: anti-aliasing filter pre-emphasis: none filter: none duration: 235 sec length (uncompressed): approx 9 Mb (uncompressed) 白噪声:White noise White Noise acquired by sampling high-quality analog noise generator (Wandel & Goltermann). Exhibits equal energy per Hz. bandwidth. 车内噪声:volvo Volvo 340 noise acquired by recording samples from 1/2" B&K condensor microphone onto digital audio tape (DAT). This recording was made at 120 km/h, in 4th gear, on an asphalt road, in rainy conditions. 军用车辆噪音:Military vehicle noise Leopard 2 noise acquired by recording samples from 1/2" B&K condensor microphone onto digital audio tape (DAT). The Leopard 1 vehicle was moving at a speed of 70 km/h. The sound level during the recording process was 114 dBA. 坦克内部噪声:Tank noise M109 noise acquired by recording samples from 1/2" B&K condensor microphone onto digital audio tape (DAT). The M109 tank was moving at a speed of 30 km/h. The sound level during the recording process was 100 dBA. 餐厅内嘈杂噪声:speech babble Voice Babble acquired by recording samples from 1/2" B&K condensor microphone onto digital audio tape (DAT). The source of this babble is 100 people speaking in a canteen. The room radius is over two meters; therefore, individual voices are slightly audible. The sound level during the recording process was 88 dBA. 高频信道噪声:HF channel noise Recording of noise in an HF radio channel after demodulation 粉红噪声:pink noise Pink Noise acquired by sampling high-quality analog noise generator (Wandel & Goltermann). Exhibits equal energy per 1/3 octave. 机枪噪声:Machine gun noise Machine Gun noise acquired by recording samples from 1/2" B&K condensor microphone onto digital audio tape (DAT). The weapon used was a .50 calibre gun fired repeatedly. 工厂车间噪音1:Factory floor noise 1 Factory noise acquired by recording samples from 1/2" B&K condensor microphone onto digital audio tape (DAT). This noise was recorded near plate-cutting and electrical welding equipment. (板切割及电器设备焊接) 工厂车间噪音2:Factory floor noise 2 Factory noise acquired by recording samples from 1/2" B&K condensor microphone onto digital audio tape (DAT). This noise was recorded in a car production hall. (汽车生产车间) F16座舱噪声:F-16 cockpit noise F-16 noise acquired by recording samples from 1/2" B&K condensor microphone onto digital audio tape (DAT). The noise was recorded at the co-pilot's seat in a two-seat F-16, traveling at a speed of 500 knots, and an altitude of 300-600 feet. The sound level during the recording process was 103 dBA.It was found that the flight condition had only a minor effect on the noise. The reproduced noise can therefore be considered to be representative. 驱逐舰机舱噪声:Destroyer engine room noise Destroyer: Engine Room noise acquired by recording samples from microphone onto digital audio tape (DAT). The sound level during the recording process was 101 dBA. 驱逐舰作战室背景噪音:Destroyer operations room background noise Destroyer: Operations Room noise acquired by recording samples from microphone onto digital audio tape (DAT). The sound level during the recording process was 70 dBA. Buccaneer驾驶舱噪声1: cockpit noise;Buccaneer jet traveling at 190 knots; Buccaneer noise acquired by recording samples from 1/2" B&K condensor microphone onto digital audio tape (DAT). The Buccaneer jet was moving at a speed of 190 knots, and an altitude of 1000 feet, with airbrakes out. The sound level during the recording process was 109 dBA. Buccaneer驾驶舱噪声2: cockpit noise;Buccaneer jet traveling at 450 knots; Buccaneer noise acquired by recording samples from 1/2" B&K condensor microphone onto digital audio tape (DAT). The Buccaneer was moving at a speed of 450 knots, and an altitude of 300 feet. The sound level during the recording process was 116 dBA.