Review report on EC 60774-4-1: Helical-scan video tape cassette system using 12,65 mm (0,5 in) magnetic tape on type VHS - Part 4: S-VHS video cassette system - ET mode IEC 61305-5-1: Household high-fidelity audio equipment and systems - Methods of measurement and specifying the performance - Part 5: Loudspeakers: IEC 61603-7-1: Transmission of audio and/or video and related signals using infra-red radiation - Part 7: Digital audio signals for conference and similar applications IEC 61603-8-1: Transmission of audio and/or video and related signals using infra-red radiation - Part 8-1: Digital audio and related signals IEC 62121-1: Methods of measurement for Minidisc recorders/players