EP0178906A2
Expired / Lapsed
EP
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Magnetic recording and reproducing apparatus
Assignee: Pioneer Corp
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Filing: 1985-10-15
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Granted: —
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Expires: 2005-10-15
Abstract
Abstract A magnetic recording and reproducing apparatus in which audio PCM-encoded data is recorded and reproduced in areas in which video data is usually recorded using a head drum rotational speed and tape feeding speed different from those used for ordinary video or audio signal recording. Accordingly, because the recording area for the audio signals is effectively increased, the number of quantization bits of the audio signal can be increased without reducing the number of channels of audio signals recorded or the sampling frequency, thus providing an improved dynamic range and reproduced sound quantity.
Inventors
- 👤 Saburo Pioneer Electronic Corp. Takaoka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 15:49
CPC Classifications
G; G11; G11B; G11B20/00; G11B15/00; G11B15/18; G11B15/1808; G11B15/1875; G11B20/10; G11B20/10527; G11B5/00; G11B5/008; G11B5/00813; G11B5/00878; H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/928
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
207 words
A magnetic recording and reproducing apparatus. comprising: a head drum; a pair of magnetic heads mounted on said head drum and spaced apart from one another by an angle of 180° , a magnetic tape passing around said drum through an angle of greater than 180° , whereby each of said magnetic heads contacts said magnetic tape during rotation thereof during a first period; means for recording a first data signal using said magnetic heads during a second period during which each of said magnetic heads rotates through an angle of 180° : means for recording a second data signal during a third period during which said magnetic heads rotate through a predetermined angle; means for generating a first command when a signal bearing video data as said first data signal is recorded and reproduced and a second command when a signal bearing PCM audio data as said first data signal is recorded and reproduced: means for driving said head drum at a first rotational speed and said magnetic tape at a first feeding speed when said first command is given and for driving said head drum at a second rotational speed and said magnetic tape at a second feeding speed when said second command is given.
Claim 2
Dependent Claim
207 words
A magnetic recording and reproducing apparatus. comprising: a head drum; a pair of magnetic heads mounted on said head drum and spaced apart from one another by an angle of 180° , a magnetic tape passing around said drum through an angle of greater than 180° , whereby each of said magnetic heads contacts said magnetic tape during rotation thereof during a first period; means for recording a first data signal using said magnetic heads during a second period during which each of said magnetic heads rotates through an angle of 180° : means for recording a second data signal during a third period during which said magnetic heads rotate through a predetermined angle; means for generating a first command when a signal bearing video data as said first data signal is recorded and reproduced and a second command when a signal bearing PCM audio data as said first data signal is recorded and reproduced: means for driving said head drum at a first rotational speed and said magnetic tape at a first feeding speed when said first command is given and for driving said head drum at a second rotational speed and said magnetic tape at a second feeding speed when said second command is given.
Claim 3
Dependent Claim
185 words
A magnetic recording and reproducing apparatus, comprising: a head drum; a pair of magnetic heads mounted on said head drum and spaced apart from one another by an angle of 180° . a magnetic tape passing around said drum through an angle of greater than 180°, whereby each of said magnetic heads contacts said magnetic tape during rotation thereof during a first period; means for recording a first data signal using said magnetic heads during a second period during which each of said magnetic heads rotates through an angle of 180° : means for recording a second data signal during a third period during which said magnetic heads rotate through a predetermined angle: a servo mechanism for performing tracking control in accordance with a four-frequency pilot tracking method during reproducing: means for generating a switching command when said servo mechanism is not in a locked condition within a predetermined period of time following the start of a reproducing operation: and means for changing a rotational speed of said head drum and a feeding speed of said magnetic tape in response to said mode switching command.
Claim 4
Dependent Claim
185 words
A magnetic recording and reproducing apparatus, comprising: a head drum; a pair of magnetic heads mounted on said head drum and spaced apart from one another by an angle of 180° . a magnetic tape passing around said drum through an angle of greater than 180°, whereby each of said magnetic heads contacts said magnetic tape during rotation thereof during a first period; means for recording a first data signal using said magnetic heads during a second period during which each of said magnetic heads rotates through an angle of 180° : means for recording a second data signal during a third period during which said magnetic heads rotate through a predetermined angle: a servo mechanism for performing tracking control in accordance with a four-frequency pilot tracking method during reproducing: means for generating a switching command when said servo mechanism is not in a locked condition within a predetermined period of time following the start of a reproducing operation: and means for changing a rotational speed of said head drum and a feeding speed of said magnetic tape in response to said mode switching command.
References Cited (Backward Citations)
No citation records indexed.
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