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IPC 7
  H04N 5/00 - H04N 5/956  
H04N00700-H04N10100
 

SECTION H – ELECTRICITY


H 04ELECTRIC COMMUNICATION TECHNIQUE


H 04 NPICTORIAL COMMUNICATION, e.g. TELEVISION (measuring, testing G01; systems for autographic writing, e.g. writing telegraphy, which involve following an outline G08; information storage based on relative movement between record carrier and transducer G11B; coding, decoding or code conversion, in general H03M; broadcast distribution or the recording of use made thereof H04H) [4]


7/

00Television systems (details H04N 3/00, H04N 5/00; specially adapted for colour television H04N 11/00; stereoscopic television systems H04N 13/00) [4]

7/

01.Conversion of standards  [4]

7/

015.High-definition television systems  [6]

7/

025.Systems for transmission of digital non-picture data, e.g. of text during the active part of a television frame  [6]

7/

03..Subscription systems therefor  [6]

7/

035..Circuits for the digital non-picture data signal, e.g. for slicing of the data signal, for regeneration of the data-clock signal, for error detection or correction of the data signal  [6]

7/

04.Systems for the transmission of one television signal, i.e. both picture and sound, by a single carrier  [4]

7/

045..the carrier being frequency modulated  [6]

7/

06.Systems for the simultaneous transmission of one television signal, i.e. both picture and sound, by more than one carrier  [4]

7/

08.Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band  [4,6]

7/

081..the additional information signals being transmitted by means of a subcarrier  [6]

7/

083..with signal insertion during the vertical and the horizontal blanking interval  [6]

7/

084..with signal insertion during the horizontal blanking interval  [6]

7/

085...the inserted signal being digital  [6]

7/

087..with signal insertion during the vertical blanking interval  [4]

7/

088...the inserted signal being digital  [6]

7/

10.Adaptations for transmission by electrical cable (H04N 7/12 takes precedence)  [4]

7/

12.Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal (H04N 7/24 takes precedence; high-definition television systems H04N 7/015)  [4]

7/

14.Systems for two-way working (H04N 7/173 takes precedence)  [4]

7/

15..Conference systems (telephonic conference arrangements H04M 3/56)  [5]

7/

16.Secrecy systems; Subscription systems

7/

167..Systems rendering the television signal unintelligible and subsequently intelligible  [4]

7/

169...Systems operating in the time domain of the television signal  [6]

7/

171...Systems operating in the amplitude domain of the television signal  [6]

7/

173..with two-way working, e.g. subscriber sending a programme selection signal  [4]

7/

18.Closed-circuit television systems, i.e. systems in which the signal is not broadcast

7/

20.Adaptations for transmission via a GHz frequency band, e.g. via satellite  [4]

7/

22.Adaptations for optical transmission  [4]

7/

24.Systems for the transmission of television signals using pulse code modulation  [6]

7/

26..using bandwidth reduction (information reduction by code conversion in general H03M 7/30)  [6]

7/

28...using vector coding  [6]

7/

30...involving transform coding (H04N 7/50 takes precedence; digital computers for performing complex mathematical operations, e.g. domain transformation, G06F 17/14)  [6]

7/

32...involving predictive coding (H04N 7/48, H04N 7/50 take precedence)  [6]

7/

34....using spatial prediction  [6]

7/

36....using temporal prediction  [6]

7/

38....involving delta modulation (systems using differential pulse code modulation in general H04B 14/06)  [6]

7/

40.....adaptive  [6]

7/

42....involving differential modulation (systems using differential pulse code modulation in general H04B 14/06)  [6]

7/

44.....adaptive  [6]

7/

46....using subsampling at the coder and sample restitution by interpolation at the coder or decoder  [6]

7/

48...involving pulse code modulation and predictive coding  [6]

7/

50...involving transform and predictive coding  [6]

7/

52..Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal, a synchronising signal  [6]

7/

54...the signals being synchronous  [6]

7/

56....Synchronising systems therefor  [6]

7/

58...involving more than one video signal  [6]

7/

60...the signals being asynchronous  [6]

7/

62....Synchronising systems therefor  [6]

7/

64..Systems for detection or correction of transmission errors (coding, decoding or code conversion for error detection or error correction in general H03M 13/00)  [6]

7/

66...using redundant codes  [6]

7/

68...using error concealment  [6]


9/

00Details of colour television systems  [4]

9/

04.Picture signal generators  [4]

9/

07..with one pick-up device only  [2,4]

9/

077...whereby the colour signals are characterised by their phase  [4]

9/

083...whereby the colour signals are characterised by their frequency  [4]

9/

09..with more than one pick-up device  [4]

9/

093...Systems for avoiding or correcting misregistration of video signals  [4]

9/

097...Optical arrangements associated therewith, e.g. for beam-splitting, for colour correction (beam-splitting in general G02B 27/10)  [4]

9/

10..using optical-mechanical scanning means only (H04N 9/11 takes precedence; optical scanning systems in general G02B 26/10)  [2,4]

9/

11..Scanning of colour motion picture films, e.g. for telecine  [2,4]

9/

12.Picture reproducers (devices or arrangements for the electro-, magneto- or acousto-optical modulation or deflection of light beams G02F)  [2,4]

9/

14..using optical-mechanical scanning means only (H04N 9/11 takes precedence; optical scanning systems in general G02B 26/10)  [2,4]

9/

16..using cathode ray tubes (H04N 9/11 takes precedence; cathode-ray tubes H01J 31/00)  [2,4]

9/

18...using separate electron beams for the primary colour signals (H04N 9/27 takes precedence)  [2,4]

9/

20....with more than one beam in a tube  [4]

9/

22...using the same beam for more than one primary colour information (H04N 9/27 takes precedence)  [2,4]

9/

24....using means, integral with, or external to, the tube, for producing signal indicating instantaneous beam position  [4]

9/

26....using electron-optical colour selection means, e.g. line grid, deflection means in or near the gun or near the phosphor screen  [4]

9/

27...with variable depth of penetration of electron beam into the luminescent layer, e.g. penetrons  [2,4]

9/

28...Arrangements for convergence or focusing  [4]

9/

285....using quadrupole lenses (quadrupole lenses per se G21K 1/08, H01J 3/14, H01J 29/58, H01J 37/10)  [4]

9/

29...using demagnetisation or compensation of external magnetic fields  [2,4]

9/

30..using solid-state colour display devices  [4]

9/

31..Projection devices for colour picture display  [2,4]

9/

43.Conversion of monochrome picture signals to colour picture signals for colour picture display  [4]

9/

44.Colour synchronisation  [4]

9/

45..Generation or recovery of colour sub-carriers  [4]

9/

455..Generation of colour burst signals; Insertion of colour burst signals in colour picture signals or separation of colour burst signals from colour picture signals (H04N 9/45 takes precedence)  [4]

9/

465..Synchronisation of the PAL-switch  [4]

9/

47..for sequential signals  [2,4]

9/

475..for mutually locking different synchronisation sources  [4]

9/

64.Circuits for processing colour signals (H04N 9/77 takes precedence)  [4]

9/

65..for synchronous modulators  [4]

9/

66..for synchronous demodulators  [4]

9/

67..for matrixing  [4]

9/

68..for controlling the amplitude of colour signals, e.g. automatic chroma control circuits (H04N 9/71, H04N 9/73 take precedence)  [4]

9/

69...for modifying the colour signals by gamma correction  [4]

9/

70..for colour killing  [4]

9/

71...combined with colour gain control  [4]

9/

72..for reinsertion of dc and slowly varying components of colour signals  [4]

9/

73..colour balance circuits, e.g. white balance circuits, colour temperature control  [4]

9/

74..for obtaining special effects (H04N 9/65 to H04N 9/73 take precedence)  [4]

9/

75...Chroma key  [4]

9/

76...for mixing of colour signals (H04N 9/75 takes precedence)  [4]

9/

77.Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase (circuits for matrixing H04N 9/67)  [4]

9/

78..for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter  [4]

9/

79.Processing of colour television signals in connection with recording  [4]

9/

793..for controlling the level of the chrominance signal, e.g. by means of automatic chroma control circuits  [6]

9/

797..for recording the signal in a plurality of channels, the bandwidth of each channel being less than the bandwidth of the signal (H04N 9/804, H04N 9/81, H04N 9/82 take precedence)  [6]

9/

80..Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback  [4]

9/

802...involving processing of the sound signal (H04N 9/806, H04N 9/835 take precedence)  [6]

9/

804...involving pulse code modulation of the colour picture signal components  [6]

9/

806....with processing of the sound signal  [6]

9/

808...involving pulse code modulation of the composite colour video-signal  [6]

9/

81...the individual colour picture signal components being recorded sequentially only  [4]

9/

815....the luminance signal and the sequential colour component signals being recorded in separate recording channels  [6]

9/

82...the individual colour picture signal components being recorded simultaneously only  [4]

9/

825....the luminance and chrominance signals being recorded in separate channels  [6]

9/

83....the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal  [4]

9/

835.....involving processing of the sound signal  [6]

9/

84.....the recorded signal showing a feature, which is different in adjacent track parts, e.g. different phase or frequency  [4]

9/

85....the recorded brightness signal occupying a frequency band totally overlapping the frequency band of the recorded chrominance signal, e.g. frequency interleaving  [4]

9/

86...the individual colour picture signal components being recorded sequentially and simultaneously, e.g. corresponding to SECAM-system  [4]

9/

87..Regeneration of colour television signals (H04N 9/80 takes precedence)  [4]

9/

873...for restoring the colour component sequence of the reproduced signal  [6]

9/

877...by assembling picture element blocks in an intermediate memory  [6]

9/

88...Signal drop-out compensation  [4]

9/

882....the signal being a composite colour television signal  [6]

9/

885.....using a digital intermediate memory  [6]

9/

888....for signals recorded by pulse code modulation (error detection or correction of digital signals for recording in general G11B 20/18)  [6]

9/

89...Time-base error compensation  [4]

9/

893....using an analogue memory, e.g. a CCD-shift register, the delay of which is controlled by a voltage controlled oscillator  [6]

9/

896....using a digital memory with independent write-in and read-out clock generators  [6]

9/

898...using frequency multiplication of the reproduced colour signal with another auxiliary reproduced signal, e.g. a pilot signal carrier  [6]


11/

00Colour television systems (details H04N 9/00; stereoscopic H04N 15/00) [4]

11/

02.with bandwidth reduction (H04N 11/04 takes precedence)  [4]

11/

04.using pulse code modulation  [4]

11/

06.Transmission systems characterised by the manner in which the individual colour picture signal components are combined  [4]

11/

08..using sequential signals only (dot sequential systems H04N 11/12)  [4]

11/

10...in which colour signals are inserted in the blanking interval of brightness signal  [4]

11/

12..using simultaneous signals only  [4]

11/

14...in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system  [4]

11/

16....the chrominance signal alternating in phase, e.g. PAL-system  [4]

11/

18..using simultaneous and sequential signals, e.g. SECAM-system  [4]

11/

20..Conversion of the manner in which the individual colour picture signal components are combined, e.g. conversion of colour television standards  [4]

11/

22...in which simultaneous signals are converted into sequential signals or vice versa  [4]

11/

24.High-definition television systems  [6]


13/

00Stereoscopic television systems; Details thereof (specially adapted for colour television H04N 15/00) [4]

13/

02.Picture signal generators  [4]

13/

04.Picture reproducers  [4]


15/

00Stereoscopic colour television systems; Details thereof  [4]


17/

00Diagnosis, testing or measuring for television systems or their details  [4]

17/

02.for colour television signals  [4]

17/

04.for receivers  [4]

17/

06.for recorders  [4]


Indexing scheme associated with groups H04N 1/00 to H04N 17/00, relating to still video cameras. The indexing code should be unlinked.  [6]

Note

 Attention is drawn to Chapter IV of the Guide which sets forth the rules concerning the application and presentation of the different types of indexing code.  [6]


101:

00Still video cameras  [6]


  H04N 5/00 - H04N 5/956   
 

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