丽的呼声（Rediffusion）是一家英国公司，于1920年代在英国成立，初时名为Broadcast Relay Services，早期为英国一些接收不到电台大气电波信号的偏远地区以电缆作电台转播，后于1950年代兼营电视台、电视机租赁及销售。他们曾在香港、新加坡、马来西亚及巴巴多斯等英国殖民地及泰国成立「丽的呼声」有线电台及在香港成立东亚地区第一家电视台——丽的映声，1954至1968年亦获得刚刚成立的英国独立电视台（免费无线电视台）伦敦地区周一至周五节目的经营权（当时名称为Associated-Rediffusion）。丽的呼声除了经营电视相关的业务外，还有机舱仿真器制作、丽的乐韵背景音乐等业务分支。

Rediffusion was a business which distributed radio and TV signals through wired relay networks. The business gave rise to a number of other companies, including Associated-Rediffusion, later known as Rediffusion London, one of the first companies to win a terrestrial ITV (commercial television) franchise in the UK. Rediffusion also spawned a record label, Rediffusion International Music, in 1968. Redifon was the name used until 1981 for companies in the capital goods businesses of Rediffusion, viz. Redifon Computers, Redifon Flight Simulation and Redifon Telecommunications.