Kate Hi-Res Audio 技术设计要点
Hi-Res Audio是由JAS（日本音频协会）和CEA（消费电子协会）制定的高品质音频产品设计标准。Hi-Res是High Resolution Audio的缩写。
Hi-Res Audio采样率比较图如下，采样频率越高，比特深度越大就意味着对声音的描述、还原更加精准。
申请使用 Hi-Res AUDIO logo的认证流程如下；
Step 1,和日本JAS签订Non-disclosure Agreement (NDA)保密协议；
Step 2, 按照JAS要求填写如下资料；
License agreement for use of Hi-Res AUDIOlogo
Due diligence check report (form)
Technical specification and data of theproduct
Product information
Step 4，JAS和申请者电话会谈
Step 5，付费
Step 6, JAS收到费用后，向申请者发放Hi-Res AUDIO logo下载使用的信息
审核周期：2-3周左右
What is Hi-Res Audio?
Hi-Res Audio (HRA) offers the highest digital sound quality while retaining the benefits of digital audio, such as portability and personalization. HRA provides listeners greater sound clarity and detail than MP3s and other compressed digital audio formats.
(1) Microphone response performance: 40 kHz or above during recording
(2) Amplification performance: 40 kHz or above
(3) Speaker and headphone performance: 40 kHz or above
(1) Recording format: Capability of recording using the 96kHz/24bit formator above
(2) I/O (Interface): Input/output interface with a performance of96kHz/24bit or above
(3) Decoding: File playability of 96kHz/24bit or above (FLAC and WAV bothrequired)
(In case of self-recording equipment, FLAC or WAV file is required as minimumcondition)
(4) Digital Signal Processing: DSP processing of 96kHz/24bit or above
(5) D/A conversion: Digital to analog conversion processing of 96 kHz/24bits or above
Typically, hi-res downloads are a minimum of 96-kHz/24-bit, with192-kHz/24-bit becoming increasingly popular.
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