EP0313368A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus for reproducing information signals
Assignee: Sony Corp
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Filing: 1988-10-20
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Granted: —
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Expires: 2008-10-20
Abstract
Abstract In an apparatus such as an 8-mm format VTR for selectively reproducing video data and digital data, such as PCM audio data, recorded on a magnetic medium (1) with any one of a plurality of recording densities, the recording density of the digital data is detected (16) on the basis of a characteristic of the reproduced digital data, such as a characteristic clock frequency regenerated therefrom, and the processing (21 or 22) to which the reproduced digital data is subjected is selected (23,28) automatically in accordance with the detected recording density thereof, thereby facilitating the use of the apparatus for reproducing digital data recorded with different densities.
Inventors
- 👤 Kenji C/O Patents Division Nakano
- 👤 Noburu C/O Patents Division Murabayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 08:12
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/928; H04N9/00; H04N9/79; H04N9/7921; H04N9/80; H04N9/802; H04N9/82; H04N9/8205; H04N9/8233; H04N9/83; H04N9/835
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
533 words
Apparatus for reproducing an information signal recorded in a plurality of successive parallel tracks (TRA,TRB) on a recording media (1) and which comprises a video signal and at least one of a frequency-modulated monaural audio signal, frequency-modulated stereo audio signals, a standard quality digitized audio signal and a high-quality digitized audio signal, with the video signal and the frequency-modulated audio signals being recorded only in a main section (TR VD ) of each track and the digitized audio signals being recorded at least in an overscan section (TR AD ) of each track, said apparatus comprising: transducer means (12A,12B) for scanning said tracks to reproduce said information signal recorded in said successive parallel tracks; separation means (26) for separating a signal reproduced during scanning of the main section (TR VD ) of each track by said transducer means (12A,12B) and a signal reproduced during scanning of the overscan section (TR AD ) of each track by said transducer means (12A,12B); frequency-modulated monaural audio signal processing means (67) connected to said separation means (26) for receiving said signal reproduced during scanning of said main section (TR VD ) of each track and having an output (SM OUT ); frequency-modulated stereo audio signal processing means (68) connected to said separation means (26) for also receiving said signal reproduced during scanning of said main section (TR VD ) of each track and having an output (SS OUT ); standard quality digitized audio signal processing means (21) connected to said separation means (26) for receiving at least said signal reproduced during scanning of said overscan section (TR AD ) of each track and having an output (S1 OUT ); high-quality digitized audio signal processing means (22) connected to said separation means (26) for also receiving at least said signal reproduced during scanning of said overscan section (TR AD ) of each track and having an output (S2 OUT ); frequency-modulated audio signal detecting means (44) connected to said separation means (26) for detecting whether said signal reproduced during said scanning of the main section (TR VD ) of each track includes said frequency-modulated monaural audio signal or said frequency-modulated stereo audio signals; digitized audio signal detecting means (45) for detecting whether said signal reproduced during scanning of said overscan section (TR AD ) of each track includes said standard quality digitized audio signal or said high-quality digitized audio signal, said digitized audio signal detecting means (45) being connected between said separation means (26) and said standard quality and high-quality digitized audio signal processing means (21,22); selecting and controlling means (46) for selecting an audio signal from among said frequency-modulated monaural audio signal, said frequency-modulated stereo audio signal, said standard quality digitized audio signal and said high-quality digitized audio signal, in response to said frequency-modulated audio signal detecting means (44) and said digitized audio signal detecting means (45); audio output means; and switching means (69) controlled by said selecting and controlling means (46) for selectively connecting said outputs of said frequency-modulated monaural audio signal processing means (67), said frequency-modulated stereo audio signal processing means (68), said standard quality digitized audio signal processing means (21) and said high-quality digitized audio signal processing means (22) to said audio output means.
Claim 2
Dependent Claim
533 words
Apparatus for reproducing an information signal recorded in a plurality of successive parallel tracks (TRA,TRB) on a recording media (1) and which comprises a video signal and at least one of a frequency-modulated monaural audio signal, frequency-modulated stereo audio signals, a standard quality digitized audio signal and a high-quality digitized audio signal, with the video signal and the frequency-modulated audio signals being recorded only in a main section (TR VD ) of each track and the digitized audio signals being recorded at least in an overscan section (TR AD ) of each track, said apparatus comprising: transducer means (12A,12B) for scanning said tracks to reproduce said information signal recorded in said successive parallel tracks; separation means (26) for separating a signal reproduced during scanning of the main section (TR VD ) of each track by said transducer means (12A,12B) and a signal reproduced during scanning of the overscan section (TR AD ) of each track by said transducer means (12A,12B); frequency-modulated monaural audio signal processing means (67) connected to said separation means (26) for receiving said signal reproduced during scanning of said main section (TR VD ) of each track and having an output (SM OUT ); frequency-modulated stereo audio signal processing means (68) connected to said separation means (26) for also receiving said signal reproduced during scanning of said main section (TR VD ) of each track and having an output (SS OUT ); standard quality digitized audio signal processing means (21) connected to said separation means (26) for receiving at least said signal reproduced during scanning of said overscan section (TR AD ) of each track and having an output (S1 OUT ); high-quality digitized audio signal processing means (22) connected to said separation means (26) for also receiving at least said signal reproduced during scanning of said overscan section (TR AD ) of each track and having an output (S2 OUT ); frequency-modulated audio signal detecting means (44) connected to said separation means (26) for detecting whether said signal reproduced during said scanning of the main section (TR VD ) of each track includes said frequency-modulated monaural audio signal or said frequency-modulated stereo audio signals; digitized audio signal detecting means (45) for detecting whether said signal reproduced during scanning of said overscan section (TR AD ) of each track includes said standard quality digitized audio signal or said high-quality digitized audio signal, said digitized audio signal detecting means (45) being connected between said separation means (26) and said standard quality and high-quality digitized audio signal processing means (21,22); selecting and controlling means (46) for selecting an audio signal from among said frequency-modulated monaural audio signal, said frequency-modulated stereo audio signal, said standard quality digitized audio signal and said high-quality digitized audio signal, in response to said frequency-modulated audio signal detecting means (44) and said digitized audio signal detecting means (45); audio output means; and switching means (69) controlled by said selecting and controlling means (46) for selectively connecting said outputs of said frequency-modulated monaural audio signal processing means (67), said frequency-modulated stereo audio signal processing means (68), said standard quality digitized audio signal processing means (21) and said high-quality digitized audio signal processing means (22) to said audio output means.
Claim 3
Dependent Claim
49 words
Apparatus according to claim 1, wherein said selecting and controlling means (46) is operable to select said high-quality digitized audio signal when said digitized audio signal detecting means (45) detects said high-quality digitized audio signal in said signal reproduced during said scanning of the overscan section (TR AD ).
Claim 4
Dependent Claim
39 words
Apparatus according to claim 1 or claim 2, wherein said selecting and controlling means (46) is operable to select said standard quality digitized audio signal when said digitized audio signal detecting means (45) detects said standard digitized audio signal.
Claim 5
Dependent Claim
45 words
Apparatus according to claim 1, claim 2 or claim 3, wherein said high-quality digitized audio signal has a higher sampling clock frequency than said standard quality digitized audio signal, and said digitized audio signal detecting means (45) is operable to detect said sampling clock frequency.
Claim 6
Dependent Claim
44 words
Apparatus according to claim 4, wherein said digitized audio signal detecting means (45) has first and second band-pass filters (45A,45B) having respective centre frequencies corresponding to said sampling clock frequencies of said standard quality digitized audio signal and said high-quality digitized audio signal, respectively.
Claim 7
Dependent Claim
48 words
Apparatus according to claim 4 or claim 5, wherein said frequency-modulated monaural audio signal has a first carrier, said frequency-modulated stereo audio signals have said first carrier and a second carrier, and said frequency-modulated audio signal detecting means (44) is operable to detect said first and second carriers.
Claim 8
Dependent Claim
35 words
Apparatus according to claim 6, wherein said frequency-modulated audio signal detecting means (44) has first and second band-pass filters (44A,44B) having respective centre frequencies corresponding to the frequencies of said first and second carriers, respectively.
Claim 9
Dependent Claim
225 words
Apparatus according to any one of the preceding claims, wherein said video signal comprises either a frequency-modulated standard quality video signal having a first FM video centre frequency or a frequency-modulated high-quality video signal having a second FM video centre frequency higher than said first centre frequency, and said apparatus comprises: frequency-modulated standard quality video signal processing means (64) connected to said separation means (26) for receiving said signal reproduced during scanning of said main section (TR VD ) of each track and having an output (D VD ); frequency-modulated high-quality video signal processing means (65) connected to said separation means (26) for also receiving said signal reproduced during scanning of said main section (TR VD ) of each track and having an output (D VD ); video signal detecting means (42) for detecting whether said video signal is said frequency-modulated standard quality video signal or said frequency-modulated high-quality video signal, said video signal detecting means (42) being connected between said separation means (26) and said selecting and controlling means (46); video output means; and second switching means for switching a video signal by selectively connecting said outputs of said frequency-modulated standard quality video signal processing means (64) and said frequency-modulated high-quality video signal processing means (65) to said video output means, said second switching means being controlled by said selecting and controlling means (46).
Claim 10
Dependent Claim
24 words
Apparatus according to claim 8, wherein said video signal detecting means (42) is operable to detect said first and second FM video centre frequencies.
Claim 11
Dependent Claim
38 words
Apparatus according to claim 9, wherein said video signal detecting means (42) has first and second band-pass filters (42A,42B) having pass bands centered at said first FM video centre frequency and said second FM video centre frequency, respectively.
Claim 12
Dependent Claim
185 words
Apparatus according to claim 8, claim 9 or claim 10, wherein said information signal includes a multi-track digitized audio signal recorded on multiple portions of said main section (TR VD ) of each track as either said standard quality digitized audio signal or said high-quality digitized audio signal, a first pilot signal (P₁) indicative of a multi-track standard quality digitized audio signal and a second pilot signal (P₂) indicative of a multi-track high quality digitized audio signal, and said apparatus comprises: multi-track mode detecting means (43) for detecting said multi-track digitized audio signals by detecting said first and second pilot signals (P₁P₂), said multi-track mode detecting means (43) being connected to said separation means (26); and wherein said separation means (26) is controlled by said selecting and controlling means (46) so as to selectively supply the signals reproduced during scanning of said main section (TR VD ) and said overscan section (TR AD ) to said standard quality digitized audio signal processing means (21) and to said high-quality digitized audio signal processing means (22) when said first and second pilot signals (P₁,P₂), respectively, are detected.
Claim 13
Dependent Claim
35 words
Apparatus according to claim 11, wherein said multi-track mode detecting means (43) includes first and second band-pass filters (43A,43B) having centre frequencies corresponding to the frequencies of said first and second pilot signals (P₁,P₂), respectively.
References Cited (Backward Citations)
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