Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1998-12-24
2002-05-07
Boccio, Vincent F. (Department: 2615)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000, C386S349000
Reexamination Certificate
active
06385391
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a video tape reproducing apparatus having an integrated circuit in which an amplifier for amplifying an output of an audio head and an amplifier for amplifying an output of a control head are integrated with each other.
2. Description of the Related Art
A fixed type audio head for reproducing an audio signal recorded on a video tape and a control head for reproducing a control signal are integrated into one head in response to requirements for easiness of attachment and reduction of size.
FIG. 4
shows an example of the integrated head. In
FIG. 4
, reference numeral
3
designates a control head; and
4
, an audio head. Both a control signal reproduced by the control head
3
and an audio signal reproduced by the audio head
4
are led to a signal processing board
52
through a connector
51
. The audio signal led to the board
52
through the connector
51
is led to an integrated circuit
55
containing an audio signal amplifier so as to be amplified therein. The control signal led to the board
52
through the connector
51
is led to an integrated circuit
56
containing a control signal amplifier and the like so as to be processed therein.
In the aforementioned configuration, however, a problem arises as follows. That is, the integrated circuit
55
containing the audio signal amplifier is formed as a multifunctional integrated circuit containing luminance signal and chrominance signal processing circuits and the like. Further, the integrated circuit
56
containing the control signal amplifier and the like is similarly formed also as a multifunctional integrated circuit in which a microcomputer for controlling the operation of the apparatus and the like are integrated. Accordingly, each of the integrated circuits
55
and
56
has a large number of pins, so that a very large number of patterns are necessarily arranged in the periphery of each of the integrated circuits
55
and
56
. Further, it is very difficult, also in terms of the arrangement of other signal processing circuits, to form such patterns even though the integrated circuits
55
and
56
are intended to be provided in proximity to each other. Accordingly, the integrated circuits
55
and
56
must be provided so as to be far from each other. As a result, when the integrated circuit
55
is arranged in proximity to the connector
51
to give preference to shortening of audio signal patterns, the integrated circuit
56
is provided necessarily so as to be far from the connector
51
. Accordingly, patterns
57
and
58
for leading the control signal to the integrated circuit
56
become necessarily long-path patterns.
On the other hand, both the audio signal reproduced by the audio head
4
and the control signal reproduced by the control head
3
are micro-level signals in which the signal-to-noise ratio (S/N) is apt to be worsened by the influence of ambient noise. The patterns for leading the control signal to the integrated circuit
56
, however, must be provided as long patterns in terms of the arrangement of the integrated circuit
56
. Therefore, the hot-level pattern
57
and the cold-level pattern
58
are arranged adjacently to each other as the patterns for the control signal to thereby eliminate the influence of common-mode noise. However, even in the case where such pattern lines making a pair are used, the S/N of the control signal is apt to be worsened because the patterns are long. Accordingly, consideration, for example, of arranging the patterns
57
and
58
away from digital pulse transmission patterns is required. This is a large limitation on formation of patterns.
SUMMARY OF THE INVENTION
The present invention has been made to solve the aforementioned problem and an object thereof is to provide a video tape reproducing apparatus in which the patterns for micro-level signals can be formed easily.
In order to achieve the above object, according to the present invention, there is provided a video tape reproducing apparatus comprising: a fixed audio head for reproducing an audio signal recorded on a video tape; a fixed control head for reproducing a control signal recorded on the video tape; and an integrated circuit in which an audio signal amplifier for amplifying the audio signal reproduced by the audio head, and a control signal amplifier for amplifying the control signal reproduced by the control head are integrated with each other.
Thus, by simply providing the connection between the audio head and a board and the connection between the control head and the board in proximity to one integrated circuit, both the pattern for the audio signal from the audio head and the pattern for the control signal from the control head become short necessarily. As a result, both the patterns are substantially free from the influence of ambient noise.
REFERENCES:
patent: 5172239 (1992-12-01), Nakayama et al.
patent: 5398138 (1995-03-01), Tomita
patent: 5428455 (1995-06-01), Hosoya et al.
patent: 5486931 (1996-01-01), Kim et al.
patent: 5870239 (1999-02-01), Furuya
patent: 6038372 (2000-03-01), Jeon
Boccio Vincent F.
Funai Electric Co. Ltd.
Lackenbach & Siegel LLP
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