KR19990031970A - How to Play Audio on a Hi-Fi Video Cassette Recorder - Google Patents

Abstract

The present invention relates to a driving method of a hi-fi video cassette recorder capable of recording and reproducing a received main audio and a sub-audio on a magnetic tape, respectively, comprising: determining whether the video cassette recorder is in a recording mode (S102); If the video cassette recorder is in the recording mode, determining whether the main audio and the sub-audio are received in different languages (S104); If the received audio signal is broadcast in different languages, recording the predetermined bis signal and the main voice and the sub voice on the loaded magnetic tape (S108), (S110); Determining whether the video cassette recorder is in the playback mode if not in the recording mode (S102); Determining whether a vis signal is recorded in the video cassette recorder being reproduced if the video cassette recorder is in the playback mode (S112); Reading, processing and outputting a main voice and a sub-audio, respectively, when a non-signal signal is not recorded (S114); If the VIS signal is recorded, the method includes processing and outputting only the main audio (S116).

That is, the present invention selectively reproduces only the main audio when the audio signal of the magnetic tape recorded by the bilingual left and right audio heads is reproduced, so that the user can hear only the main audio without any other operation such as TV. have.

Description

How to Play Audio on a Hi-Fi Video Cassette Recorder

The present invention relates to a Hi-Fi Video Cassette Recorder (hereinafter abbreviated as V-seal), and more particularly, to selectively select one of the bilingual audios recorded at the time of recording of a bilingual broadcast. It relates to a high-fidelity audio playback method that enables playback.

V-Cal is a device that selectively magnetizes a magnetic video tape with a head to record video and audio signals or to read video and audio signals recorded on the video tape.

In particular, the V-Cal can be classified into a V-Cal for normal and a V-Cal for Hi-Fi in the audio recording method, and the V-Cal for Normal is used to separate an audio signal using a separate audio head in addition to the video head in the head drum. In other words, the audio track is recorded and read in a mono state. On the other hand, V-Fi for Hi-Fi is composed of a separate left and right audio heads in the head drum in addition to the audio head, and the left and right audio heads are capable of in-depth recording and reading of audio signals in the video track in stereo. Have

On the other hand, there is a bilingual broadcast system in addition to the above-described mono and stereo system as an audio signal transmission method. The bilingual broadcasting system simultaneously transmits an audio signal of two languages (for example, Korean and foreign languages, commonly referred to as a main voice and a sub-audio) to a single television broadcast program, and the receiving end transmits an audio signal of a desired language among the bilingual audio signals. This is how you can listen. The bilingual broadcasting is transmitted and received using two channels like the stereo broadcasting method, and in general high-fidelity TV, the bilingual audio signal can be recorded using the left and right heads.

However, when Hi-Fi VRC reads and reproduces the audio signal of the foreign language of the magnetic tape, the audio signal of the foreign language is simultaneously output through a TV or the like, so that the user can select the desired language among the foreign languages (usually the native language). There was a inconvenience to perform a separate operation for selecting the main voice.

Accordingly, the present invention has been made to solve such a problem, and when reproducing a signal of a magnetic tape recorded with a foreign language, high-fidelity audio can be automatically selected and outputted. The purpose is to provide a regeneration method.

That is, the present invention provides a method of driving a V-CAL capable of recording and reproducing the received main and sub-audios on a magnetic tape, respectively, comprising: determining whether the V-Cal is in a recording mode; Determining whether the V-CAL is in the recording mode, whether the main voice and the sub-audio are received in different languages; If the received audio signal is broadcast in different languages, recording a predetermined bis signal and a main voice and a sub voice on the loaded magnetic tape, respectively; Determining whether the VR is in the playback mode if not in the recording mode; Determining whether a VSI signal is recorded in a V-CAL being reproduced if the V-CAL is in a reproducing mode; Reading, processing, and outputting a main audio and a sub-audio, respectively, when a vis signal is not recorded; If the VIS signal is recorded, processing and outputting only the main audio is provided.

1 is a block diagram of a hi-fi video cassette recorder for carrying out the method according to the invention,

2 is a flowchart of an audio recording method of a hi-fi video cassette recorder according to the present invention;

<Description of Symbols for Main Parts of Drawings>

10: tuner 20: audio recording processing system

22: video recording processing system 30: broadcast discrimination unit

40: audio reproduction processing system 42: video reproduction processing system

50: Deck 60: Micom

70: key matrix 80: bis detection unit

The above objects and various advantages of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a block diagram of a V-Cal for performing an audio reproduction method according to the present invention, wherein a tuner 10, an audio recording processing system 20, a video recording processing system 22, and a broadcast discriminating unit are shown as shown. 30, the audio reproduction processing system 40, the video reproduction processing system 42, the deck 50, the microcomputer 60, the key matrix 70, and the VIS Index Search System (VISS) detection unit 80 Include.

The tuner 10 receives and outputs a broadcast signal of a predetermined channel under the control of the microcomputer 60, and the audio recording processing system 20 and the video recording processing system 22 output audio and video signals of the tuner 10. The recording process is applied to the deck 50. At this time, the broadcast determining unit 30 determines whether the audio signal of the tuner 10 is mono or a foreign language and applies it to the microcomputer 60. For example, in the case of Korea, two carriers are used for bilingual broadcasting, and in addition, a pilot signal indicating a bilingual broadcasting is included. The broadcast method may be determined by detecting a signal.

The deck 50 records the audio signal of the audio recording processing system 20 and the video signal of the video recording processing system 22 on the magnetic tape with the audio head and the video head in the recording mode under the control of the microcomputer 60. On the other hand, in the reproduction mode, the audio signal and the video signal recorded on the magnetic tape are read out and output to the audio head and the video head. At this time, the audio recording processing system 20 outputs the main audio and the sub-audio, respectively, during the bilingual broadcasting, and the deck 50 records the main audio and the sub-audio on the magnetic tape by using the left and right heads. (In this embodiment, it is assumed that the left head has the main voice described above and the right head has the negative voice recorded.)

The deck 50 is provided with a control head as in the general V-Cal, and the control head records the control signal of a predetermined period in the control track of the magnetic tape under the control of the microcomputer 60 (in the recording mode). In the playback mode, this control signal is read. These control signals are recorded and reproduced to match the phase between the running of the video tape and the head drum on which the head is mounted. Thus, those skilled in the art can easily understand the detailed description. At this time, the microcomputer 60 of the present invention controls the deck 50 when recording audio signals of different languages, that is, main audio and sub-audio, as described below, and outputs a predetermined bis signal in which the duty ratio of the control signal is modified. Record to the control track.

The audio signal and the video signal read out from the deck 50 are applied to the audio reproduction processing system 40, the video reproduction processing system 42, and the vis detection unit 80, and the audio reproduction processing system 40 is input to the audio signal. Is reproduced and applied to a television (not shown). Further, the audio reproduction processing system 40 is configured to process and output the main audio and the sub-audio respectively under the control of the microcomputer 60 described above when the input audio signal is two channels of the main audio and the sub-audio.

In addition, the video reproduction processing system 42 reproduces the video signal of the deck 50 and applies it to the television, and the vis detection unit 80 detects the vis signal from the control signal detected by the control head of the deck 50. It is configured to apply to the microcomputer 60.

The microcomputer 60 controls the above-described components in response to a key selected or pressed by a user among various function keys of the key matrix 70. In addition, the microcomputer 60 controls the broadcast discriminator 30 and the service detector 80 as described below. Control the configuration of the above-described components according to the output of

2 shows a flowchart of the present invention performed by the microcomputer 60 described above.

As shown, the microcomputer 60 first determines whether the current driving mode set by the key of the key matrix 70 is the recording mode or the reproduction mode (S102), and proceeds to step S104 when the recording mode is the recording mode. .

In step S104, the microcomputer 60 determines whether the audio signal of the broadcast signal being received by the tuner 10 is a mono or bilingual broadcast according to the output of the broadcast determination unit 30. As a result of the determination in step S104, when the current audio signal is broadcast in different languages, the microcomputer 60 controls the deck 50 to cause the control head to record a predetermined vis signal on the magnetic tape (S108). At this time, the left and right heads in the deck 50 record the main and sub-audios of the audio recording processing system 20 on the magnetic tape, respectively, and the video head records the video signals of the video recording processing system 22. Will be. This process continues until the recording mode ends.

That is, in the case of recording the bilingual audio signal, the VCD of the present invention simultaneously records the bis signal indicating that the bilingual voice, i.e., the main audio and the sub-audio are recorded on the magnetic tape (S110).

However, as a result of the determination in step S102, when VRC is being driven in the playback mode, the microcomputer 60 proceeds to step S112 to determine whether a vis signal is recorded on the control track of the magnetic tape currently being played. . That is, the microcomputer 60 determines whether the vis signal is recorded on the magnetic tape by the output of the vis detection unit 80. As a result of the determination in step S112, when no vis signal is recorded, the microcomputer 60 processes the audio reproduction processing system 40 to read the main audio and the sub-audio read by the left and right heads of the deck 50. In order to process and output each one (S114), if a bis signal is recorded, step S116 is performed.

That is, when the microcomputer 60 proceeds to step S116, the microcomputer 60 controls the audio reproduction processing system 40 to process only the main voice read out by the audio reproduction processing system 40 to the left head. The negative sound read by the right head cuts off the output.

That is, as can be seen from the above description, VRC according to the present invention records a bis signal on a magnetic tape when recording a foreign language audio signal, and when a bis signal is detected when reading a signal of the magnetic tape, Read and play only voice.

Therefore, it can be seen that the viewers who reproduce and view the signals of the magnetic tape on which the main audio and the sub audio are recorded can hear only the main audio without the need for a separate operation. However, depending on the needs of the user, there may be a case in which only the sub-audio or the main and sub-audios are simultaneously played and viewed. In order to prepare for such a case, additional selection keys in the configuration of the present invention are configured in the key matrix 70. According to this selection key, the microcomputer 60 may be configured to selectively control the driving of the audio reproduction processing system 40, that is, the main audio and the sub-audio. Sleeping will be easy to see.

As described above, the present invention selectively reproduces only the main audio at the time of reproduction of the audio signal of the magnetic tape recorded by the bilingual left and right audio heads, so that the user can listen to the main audio without any other operation such as TV. It works.

Claims (1)

A driving method of a hi-fi video cassette recorder capable of recording and reproducing received main audio and sub audio on magnetic tape, respectively, Determining whether the video cassette recorder is in a recording mode (S102); If the video cassette recorder is in a recording mode, determining whether the main voice and the sub-audio are received in different languages (S104); If the received audio signal is broadcast in different languages, recording the predetermined bis signal and the main voice and the sub voice on the loaded magnetic tape (S108), (S110); Determining whether the video cassette recorder is in a playback mode if not in the recording mode (S102); Determining whether a vis signal is recorded in a video cassette recorder being reproduced if the video cassette recorder is in a reproduction mode (S112); Reading, processing and outputting a main voice and a sub-audio, respectively, when the bis signal is not recorded (S114); And if the vis signal is recorded, processing and outputting only the main voice (S116).