Avi Perry

Network operators are faced with the challenge of maximizing the quality of voice transmissions in wireless communications without impairing speech or data transmission. This book provides a comprehensive survey of voice quality algorithms, features, interactions and trade-offs at the device and system levels. The book elaborates on the root cause of impairments and ways for resolving them, as well as methodologies for measuring and quantifying voice quality before and after applying the remedies. A 'troubleshooting and case studies' chapter provides a useful approach to identifying and solving network impairments. Avoiding complex mathematics, the approach is based on real and sizable field experience supported by scientific and laboratory analysis. This title is suitable for practitioners in the wireless communications industry and graduate students in electrical engineering. Further resources, including a range of audio examples, are available online at www.cambridge.org/ 9781107407

Network operators are faced with the challenge of maximizing the quality of voice transmissions in wireless communications without impairing speech or data transmission. This book provides a comprehensive survey of voice quality algorithms, features, interactions and trade-offs at the device and system levels. The book elaborates on the root cause of impairments and ways for resolving them, as well as methodologies for measuring and quantifying voice quality before and after applying the remedies. A 'troubleshooting and case studies' chapter provides a useful approach to identifying and solving network impairments. Avoiding complex mathematics, the approach is based on real and sizable field experience supported by scientific and laboratory analysis. This title is suitable for practitioners in the wireless communications industry and graduate students in electrical engineering. Further resources, including a range of audio examples, are available online at www.cambridge.org/ 9781107407

【紐伯瑞金獎大師 Avi 2026 震撼新作】★紐伯瑞金牌得主 Avi 再次展現精準的歷史觀察與緊張的敘事節奏。★《Booklist》、《Kirkus Reviews》星級好評，讀者公認「翻開後就無法放下」的歷史冒險。★真實還原 20 世紀初紐約移民群像，體現人類在逆境中追求希望的永恆力量。1910 年，13 歲的義大利少年 Santo 帶著對父親的承諾，橫跨大西洋來到紐約尋找更好的生活。然而在埃利斯島（Ellis Island）入境時，他意外與母親和手足失散。隻身一人在充滿敵意且語言不通的曼哈頓街頭，Santo 必須在犯罪邊緣與生存本能之間掙扎，並靠著驚人的毅力找回他失散的家人。這不只是一段移民的奮鬥史，更是一場關於勇氣、責任與「家」的深刻探索。Newbery Medalist Avi is back with a gripping exploration of the immigrant experience at the turn of the twentieth century. A must-read for fans of Moon over Manifest and Echo Mountain.When Santo's father left their tiny town in Italy for America, he made Santo promise to keep their family together until he has enough money to bring the rest of them to the US.It takes a few years, but Mama finally gets word that their family can join Papa. Santo couldn't be more excited to go to America--and to see his father again. However, Santo gets separated from his mother and siblings at Ellis Island, and he is left to fend for himself on the mean streets of Manhattan. Santo

“Captures the ways that war can forever alter a child’s sense of order, morality, and security in the world. Strongly visual scenes…will long resonate in readers’ minds.” — Publishers Weekly (starred

Avi's treasured Newbery Honor Book now in expanded After Words edition!Thirteen-year-old Charlotte Doyle is excited to return home from her school in England to her family in Rhode Island in the summe

Newbery Medalist Avi explores the American Revolution from a fresh perspective in the story of a young Loyalist turned British spy navigating patriotism and personal responsibility during the lead-up

In the first new Poppy book in over ten years, Newbery Medal–winning author Avi relates the previously untold tale of how Ragweed and Poppy first met, with illustrations throughout by Caldecott Medal–