'Introduction' (Telecommunications, 2009), 'Video Compression Systems: From first principles to concatenated codecs', Chap. 1, pp. 1-4, DOI: 10.1049/PBTE053E_ch1
IET Digital Library, https://digital-library.theiet.org/;jsessionid=5p7a217s0rg22.x-iet-live-01content/books/10.1049/pbte053e_ch1