Yao Jianqing: public information is limited. At present, the only known work by this author is Digital Signal Processing, catalogued under the general computing category. Judging from this single surviving title, the writing stays close to the technical field of digital signal processing and is aimed at readers who need a systematic understanding of the subject. Digital signal processing is a foundational area at the intersection of computing and electronic engineering, covering core topics such as signal sampling, transforms, and filtering; books in this field generally require authors to combine theoretical exposition with an awareness of engineering application. Because biographical details, academic background, and professional positions are unavailable, it is not possible to comment on the author's training, career, or standing in the field, nor would it be appropriate to speculate about the full range of the author's writing style. What can be said is that this book, as the only representative work held in the collection, is the main basis for understanding Yao Jianqing's output and offers some reference value for readers studying related courses.
