37:. The objective was not simply to record video, but to record it synchronously, as Baird intended playback from an inexpensive playback device, which he called a 'Phonovisor'. Baird stated that he had several records made of the sound of the vision signal but that the quality was poor. Unlike Baird's other experiments (including stereoscopy, colour and infra-red night-vision), there is no evidence of him having demonstrated playback of pictures, though he did play back the sound of the vision signal to audiences. Baird moved on leaving behind several discs in the hands of museums and favoured company members. Until 1982, this was the extent of knowledge regarding Phonovision.
88:
thereby capturing the video signal from a BBC 30-line 12.5 frames per second live broadcast. This disc preserves about four minutes of video without the corresponding audio from what McLean identified as the BBC programme 'Looking In'. This was advertised by the BBC as 'the world's first television
45:
From 1982, Donald F. McLean undertook a forensic-level investigation that identified a total of five different disc recordings dated 1927-28 that closely aligned with the principles of Baird's
Phonovision patents. In addition, study of the distortions in the recordings led to a new understanding of
70:
The earliest surviving
Phonovision disc depicts one of the dummy heads that Baird employed for tests. It was recorded on 20 September 1927 and most likely was used during tests prior to Baird's trans-Atlantic television demonstration in February 1928. This disc and the surviving documentation from
74:
The
Phonovision recordings of 10 January 1928 reveal the earliest recording of a human face identified as one of Baird's staff, Wally Fowlkes. On 28 March 1928, a recording labelled 'Miss Pounsford' was made which is, in many ways, the best of the experimental discs. In the 1990s, her relatives
46:
the mechanical problems Baird had encountered explaining why these discs were never good enough for picture playback. The problems were largely corrected by software, and the resultant images project a far better quality image than what would have been seen in Baird's laboratories at the time.
100:
Several other undated domestic recordings of 30-line television were discovered in 1998 and show high quality 30-line television (most likely from the BBC 30-line
Television Service) of singers that include one recognised by
83:
Baird's experimental discs are not the only such video recordings that have survived. In April 1933, an early television enthusiast used a
Silvatone home sound recording outfit that indented a signal-modulated groove into a
49:
Despite its technical problems, Phonovision remains the very earliest means of recording a television signal. In a sense, it can be seen as the progenitor of other disc-based systems, such as the German
108:
A comprehensive history of the recovery of
Phonovision as well as the domestic recordings of the vision signal from the BBC 30-line television service was published in 2000.
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McLean, Donald F. "The Dawn of
Television Remembered" , Enhanced CD documentary published in association with the BBC and the Royal Television Society, 2005
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33:. Attempts at developing Phonovision were undertaken in the late 1920s in London by its inventor, Scottish television pioneer
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revue'. McLean digitally recovered the televised image, revealing a high level of production values that belies the
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This article is about the phonograph records visual signal format. For the experimental pay-television station, see
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McLean, Donald F (June 2019). "Seeing Across Oceans: John Logie Baird's Trans-Atlantic
Television Demonstration".
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McLean, Donald F (April 1985). "Computer-based
Analysis and Restoration of Baird 30-line television recordings".
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identified her as Mabel
Pounsford, who had always claimed that she had been a secretary working for J L Baird.
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was a patented concept to create pre-recorded mechanically scanned television recordings on
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that demonstration are held at the University of Glasgow Archives and Special Collections.
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176:(Revised ed.). Edinburgh, Great Britain: Mercat Press Ltd. pp. 64–65.
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programming was very simple and static and offered little entertainment value.
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Anon (8 October 1927). "Report: Demonstration at White Rock Pavilion".
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McLean, Donald F (July 1989). "The Recovery of Phonovision".
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Attempt to record mechanical television on gramophone records
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Recordings from the BBC 30-line Television Service (1932-35)
135:. Vol. XLI, no. 29. 4 August 1927. p. 1
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3rd International Conference on Image Processing, IEE
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374:McLean, Donald F (December 1998). "Looking In...".
431:World's Earliest Television Recordings - Restored!
162:J L Baird, British Patent GB 324,909 October 1928
330:Cracknell, A., Letter to D F McLean, 29 May 1993
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355:McLean, Donald F (Nov 1998). "First Frames".
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66:The Experimental Phonovision Discs (1927-28)
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231:. London, UK: IEE / Peter Peregrinus Ltd.
153:J L Baird, British Patent GB 320,909, 1927
54:system of the early 1970s and the USA's
254:Journal of the Royal Television Society
229:British Television: The Formative Years
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1052:CBHD (China Blue High-definition Disc)
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1009:HVD (High-Definition Versatile Disc)
310:"University of Glasgow: Collections"
199:Hastings & St Leonard's Observer
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216:. University of California Press.
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376:Electronics and Wireless World
357:Electronics and Wireless World
340:"The First Television Revue".
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56:Capacitance Electronic Disc
41:Discoveries and restoration
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1255:Electronic Video Recording
214:Electronic Motion Pictures
172:Baird, John Logie (2004).
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1071:UHD-BD (Ultra HD Blu-ray)
968:PVD (Personal Video Disc)
402:McLean, Donald F (2000).
504:Ampex 2 inch helical VTR
1003:Professional Disc (PFD)
510:Sony 2 inch helical VTR
404:Restoring Baird's Image
292:Proceedings of the IEEE
1249:Electronicam kinescope
1236:Video recorded to film
129:"Television Predicted"
1277:Television technology
1063:Ultra-High Definition
467:Video storage formats
95:mechanical television
212:Abramson, A (1955).
406:. London, UK: IEE.
227:Burns, R W (1986).
91:conventional wisdom
86:bare aluminium disc
382:(1752): 1031–1034.
105:as being herself.
31:gramophone records
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137:. Retrieved
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103:Betty Bolton
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26:
25:
1202:Solid state
1040: 2006
944: 1996
854:Phonovision
812:D6 HDTV VTR
552:Philips VCR
342:Radio Times
316:2 September
260:(2): 87–94.
27:Phonovision
21:Phonevision
739:Betacam SX
648:Betacam SP
612:Video 2000
492:Quadruplex
413:0852967950
279:: 300–304.
238:0863410790
112:References
1243:Kinescope
1173:AVC-Intra
1140:CamCutter
1123:DVCPRO HD
890:Laserfilm
872:LaserDisc
839:Videodisc
776:Sony HDVS
475:Videotape
139:13 August
93:that all
1271:Category
1133:Tapeless
1117:DVCPRO50
896:CD Video
860:Ampex-HS
824:HDCAM SR
788:BCH 1000
751:MPEG IMX
745:Digital8
1251:(1950s)
1222:MicroP2
1143:Editcam
1085:Virtual
937:MiniDVD
925:MovieCD
912:Digital
757:MicroMV
689:Digital
666:S-VHS-C
636:Betacam
570:Betamax
540:U-matic
522:CV-2000
1257:(1967)
1245:(1947)
1224:(2012)
1218:(2007)
1212:(2004)
1193:(2012)
1187:(2009)
1185:iFrame
1181:(2007)
1175:(2006)
1169:(2006)
1163:(2005)
1157:(2004)
1155:GBA-TV
1151:(2003)
1145:(1995)
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1119:(1997)
1113:(1996)
1107:(1995)
1105:DVCPRO
1101:(1995)
1073:(2016)
1054:(2008)
1048:(2007)
1033:MiniBD
1029:(2006)
1023:(2006)
1021:HD DVD
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1011:(2004)
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999:(1994)
982:(2005)
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964:(2003)
958:(1998)
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921:(1993)
904:(1990)
898:(1987)
892:(1984)
886:(1983)
880:(1981)
874:(1978)
868:(1975)
862:(1967)
856:(1927)
847:Analog
826:(2003)
820:(2003)
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808:(1998)
802:(1997)
796:(1994)
790:(1992)
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642:Video8
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608:(1979)
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590:(1976)
588:Type C
584:(1976)
582:Type B
578:(1975)
572:(1975)
566:(1974)
560:(1974)
558:V-Cord
554:(1972)
548:(1972)
542:(1971)
536:(1969)
534:EIAJ-1
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518:(1965)
516:Type A
512:(1961)
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494:(1956)
484:Analog
410:
312:. 2016
235:
180:
52:TelDec
1167:AVCHD
1149:XDCAM
1111:DVCAM
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794:W-VHS
782:UniHi
660:S-VHS
624:VHS-C
1191:XAVC
956:SVCD
678:Ruvi
528:Akai
498:VERA
408:ISBN
318:2023
233:ISBN
178:ISBN
141:2020
1216:SxS
1179:TOD
1161:MOD
1015:VMD
980:FVD
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962:EVD
950:CVD
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919:VCD
902:VSD
884:VHD
878:CED
866:TeD
818:HDV
715:DCT
672:Hi8
654:MII
618:CVC
606:SVR
594:VHS
576:IVC
380:104
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296:107
277:307
1273::
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