Hi-Res Audio certification introduction
Hi-Res (High Resolution Audio) is called high-resolution audio, and Hi-Res Audio certification is a design proposed and defined by Sony and recognized by JAS (Japanese Audio Association) and CEA (Consumer Electronics Association) for the purpose of performance extreme music quality and original sound reproduction. According to JAS 'definition of high-resolution digital audio, for the device's input / output and signal processing, its dynamic response range must be at least 24bits of data processing width, and the sampling frequency must be at least 96kHz, which are all standard specifications.
For more detail information, you can visit below link.