KR0166738B1 - Fade editing device in vcr - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a signal editing apparatus for a video cassette recorder (VCR), and more particularly to a fade editing apparatus for synthesizing a reproduction signal already recorded on a tape and a signal input from the outside using a memory. In the past, when a signal was edited, a fade in / out function of synthesizing a signal input from the outside to a signal recorded on a tape was possible only in a broadcast VCR having a recording head and a playback head separately. However, the present invention provides the advantage of fade in / out editing with only one head using a memory to alleviate this problem.

Description

Brie's Fade Editor

1 is a block diagram showing a head drum of a broadcasting VCR having a recording head (REC) and a playback head (PB) separately.

2 is a conceptual diagram for explaining fade editing of a signal recorded on a video tape and a signal applied from the outside.

FIG. 3 is a detailed block diagram showing the crossfade section 30 in FIG.

4 is a block diagram showing a V-Cal fade editing apparatus according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

41: deck portion 42: audio / video signal separation unit

43: control unit 44,48: signal processing unit

45, 49: signal output section 46,50: signal extraction section

47,51: 1st, 2nd memory 100: signal synthesizing means

120,140: first and second crossfade unit 160: audio / video signal synthesis unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal editing apparatus of a video cassette recorder (VCR), and in particular, a fade editing apparatus of V-Cal that synthesizes a playback signal already recorded on a tape and a video signal input from the outside using a memory. It is about.

Fade has a fade in function that shows the sound or video gradually, and a fade out function that gradually disappears due to the weakening of the sound or video. In synthesizing and editing the applied signals, this fade function allows for the natural connection of two different signals.

In general, the fade in / out editing function of a signal may be implemented by attaching a switcher to the outside or by attaching two head drums as shown in FIG. In addition, by combining the playback signal and the recording signal, it reproduces the signal recorded on the video tape and combines it with the input signal of the external line to simultaneously play and record, and also fade out of the playback signal or fade in of the input signal. In this way, the overlapping function of the video signal and the audio signal was possible. The fade editing apparatus of the broadcast VCR will be briefly described with reference to FIG. 1 and FIG. FIG. 1 shows a head drum of a broadcast fade editing apparatus having a recording (REC) dedicated head and a playback (PB) dedicated head separately. When a fade editing function is to be implemented by an apparatus having a head drum as shown in Fig. 1, the playback section A to B of a prescribed tape track is first played out as shown in Fig. 2 (a). PB scans and reads out the playback signal. Here, the editing section can be set by the user in about 5 ms to 10 ms. Then, as shown in FIG. 2 (b), the playhead PB transfers the data read from the edit start point A to the edit end point B on the video tape to the crossfade section 30. FIG. In addition, an external signal to be recorded is also applied to the crossfade section 30. The crossfade unit 30 simultaneously receives the reproduction signal and the recording signal in accordance with the control signal, synthesizes and outputs a recording signal to be newly recorded on the tape, and the recording-only head REC records it on the video tape.

3 is a diagram illustrating the crossfade section 30. The configuration and operation of the crossfade unit 30 will be briefly described with reference to FIG. 3. The crossfade section 30 includes a fade in section 34 that receives an external input signal and a fade out section 36 that receives a playback signal recorded on a tape. The weight adjusting unit 32 is connected to output a signal for controlling the fade in unit 34 and the fade out unit 36. The synthesizing section 38 is configured to receive output signals from the fade-in section 34 and the fade-out section 36, synthesize these two signals, and output a recording signal to be newly recorded.

Here, when the crossfade unit 30 is described in more detail, the weight adjusting unit 32 outputs a control signal to the fade-out unit 36 so that the size of the reproduction signal read by the reproduction head PB is gradually reduced. In addition, the weight adjusting unit 32 applies a control signal to the fade-in unit 34 so that the magnitude of the signal applied from the outside gradually increases. That is, the weight adjusting unit 32 gives a weight of 100% to the playback signal at the edit start point A and a weight of 0% to the external input signal so that the external signal is not recorded at all. Then, the weight adjusting unit 32 gradually adjusts the weights to the contrary, so that the edit end point B gives a weight of 0% for the reproduction signal and a weight of 100% for the external input signal. The control unit 36 outputs a control signal. The synthesizing unit 38 receives the two signals adjusted as described above, synthesizes the two signals, and outputs the two signals. Here, the weight refers to a gain value for adjusting the magnitude value of the signal. As a result, the crossfade unit 30 gradually decreases the size of the playback signal recorded in the editing section set on the tape, and gradually increases the size of the recording signal to be recorded so that there is no break when editing the signal. Allow two signals to connect naturally.

The conventional technique as described above can smoothly perform a fade in / out editing function. In this case, however, each read-only head and a write-only head must be provided independently. Such a fade editing function is possible in expensive broadcasting equipment provided with a reproduction and recording head separately. However, in general, a home VCR which requires a simple editing function has a single head for playback and recording because of the cost. Therefore, it is difficult to implement a fade in / out editing function with only one head of such a home VCR.

Accordingly, an object of the present invention for solving the above problems is to edit the playback signal already recorded on the tape and the signal input from the outside. To the beginning of the editing section. Then, the present invention provides a VCR fade editing apparatus for synthesizing two signals by crossfade editing and a signal applied from the outside.

A feature of the present invention for achieving the above object is an editing apparatus for synthesizing a reproduction signal recorded on a video tape and a recording signal applied from the outside into a preset editing section, comprising a recording / reproducing head, Deck means for reading out the reproduction signal between the edit start point and the edit end point through the recording / reproducing head, recording the signal applied from the signal synthesizing means under the control of the control unit, and receiving and outputting the reproduction signal from the video tape. Signal processing means for processing into a suitable signal, signal storage means for storing a reproduction signal between the edit start point and the edit end point, different weights are added to the reproduction signal stored in the signal storage means and the recording signal from the outside Signal synthesizing means for performing crossfade editing for adjusting the size and during the editing period; After storing the data read from the tape, a control signal for rewinding the tape to the start point of the edit section is output to the deck unit, and the crossfade edited signal is edited from the start point to the end point of the edit section of the tape. And a fade editing device of V-Cal having control means for controlling the deck means to write to.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a block diagram showing a fade editing apparatus of a VCR which is the apparatus of the present invention. The deck unit 41 outputs the reproduction signal recorded on the video tape to the audio / video signal separation unit 42 under the control of the control unit 43. The audio signal processor 44 outputs the audio / video signal separator 42. The audio signal processor 44 processes the audio signal received from the audio / video signal separator 42 according to the output form. The audio signal output unit 45 receives the signal processed signal, amplifies it, and outputs the amplified signal to the speaker. In addition, an audio signal extractor 46 is connected to an output terminal of the audio signal processor 44. The audio signal extraction section 46 extracts the audio data signal-processed from the audio signal processing section 44 during the editing sections A to B. The first memory 47 stores the audio data thus extracted.

Meanwhile, the video signal extracted by the audio / video signal separator 42 is applied to the video signal processor 48. The video signal processor 48 properly processes the applied video signal in an output form. The video signal output unit 49 receives the amplified video signal, amplifies it, and outputs the amplified signal to the monitor. In addition, the video signal extractor 50 is connected to the output terminal of the video signal processor 48. The video signal extraction unit 50 extracts the video data signaled from the video signal processing unit 48 during the editing section to fade edit. The second memory 51 stores the extracted video data. The signal synthesizing means 100 for synthesizing the signals is connected to each output terminal of the first memory 47 and the second memory 51. The signal synthesizing means 100 comprises a first crossfade portion 120 for crossfading an audio signal and a second crossfade portion 140 for crossfading the video signal. The audio / video signal synthesizing unit 160 for outputting the entire recording signal by receiving the respective signals is connected to the output terminals of the first and second crossfade units 120 and 140. Here, the crossfade parts 120 and 140 include all of the configuration of FIG. 3, and the operation thereof is described with reference to FIG. 3, and a detailed description of crossfade editing will be omitted below.

The operation of the present invention will be described once again in detail with reference to FIG. First, the user sets and inputs a section to fade on the videotape. When the user sets the edit start point A and the edit end point B, the control unit 43 drives the head of the deck unit 41 to reproduce the signal between the edit start point A and the edit end point B. FIG. At this time, the audio / video signal separator 42 separates the reproduced signal into an audio signal and a video signal and outputs the audio signal to the audio signal processor 44 and the video signal processor 48, respectively. At this time, the audio signal extracting section 46 extracts the audio data from the audio signal processing section 44 during the preset editing sections A to B. FIG. The video signal extracting unit 50 extracts the video signal from the video signal processing unit 48 during the preset editing sections A to B. FIG. The first memory 47 and the second memory 51 store the extracted audio signal and the video signal under the control of the control unit 43, respectively. Each of the memories 47 and 51 stores all the extracted signals. Then, the control section 43 applies a drive control signal to the deck section 41 for rewinding the tape wound forward during playback to the start point of the editing section. When the tape is rewound to the editing start point A, the first crossfade unit 120 reads the audio signal stored in the first memory 47, and at the same time reads the external audio input signal to synthesize the two signals. Fade Edit In addition, the second crossfade unit 140 reads the video signal stored in the second memory 51 under the control of the control unit 43, and simultaneously reads the external video input signal and synthesizes the two signals to perform video fade editing. do. The audio / video signal synthesizing unit 160 receives the respective audio signals and the video signals from the first and second crossfade units 120 and 140, synthesizes the two signals, and outputs the synthesized signals as the entire recording signals.

Accordingly, the present invention provides a fade in / out function for synthesizing a video signal and an audio signal input from the outside to a video signal and an audio signal recorded on a tape when editing a signal in a VCR. The present invention relates to an apparatus for solving a conventional problem that was possible only in a broadcast VCR. The present invention provides the advantage of fade in / out editing function with only one head to solve this problem.

Claims (5)

An editing apparatus which synthesizes a reproduction signal recorded on a video tape and a recording signal applied from the outside in a predetermined editing section, comprising a recording / reproducing head, and the editing start point and the end point of editing through this recording / reproducing head. Deck means for reading out a reproduction signal therebetween and recording a signal applied from the signal synthesizing means under the control of a control unit; Signal processing means for receiving a reproduction signal from the video tape and processing the signal into a signal suitable for output; Signal storage means for storing a reproduction signal between the edit start point and the edit end point; Signal synthesizing means for performing crossfade editing to adjust the magnitude of the signal by adding different weights to the reproduction signal stored in the signal storage means and the recording signal from the outside; And when the storage of the data read out from the tape is completed during the editing section, a control signal for rewinding the tape to the start point of the editing section is output to the deck unit, and the crossfade edited signal is a starting point of the editing section of the tape. A fade edit section of a V-R, comprising control means for controlling the deck means to record in the edit section from the end point to the end point. The audio / video signal separation unit of claim 1, wherein the signal processing unit comprises: an audio / video signal separation unit for separating a reproduction signal between the edit start point and the edit end point into a video reproduction signal and an audio reproduction signal; An audio signal processing unit which receives the audio reproduction signal separated from the audio / video signal separation unit and processes the audio reproduction signal into a signal suitable for output to a speaker; An audio signal extraction unit for extracting an audio reproduction signal from the audio signal processing unit during the editing period; A video signal processor for receiving a video playback signal separated from the audio / video signal separator and processing the video signal into a signal suitable for output to a monitor; And a video signal extracting unit for extracting a video reproduction signal from the video signal processing unit during the editing period. 2. The apparatus of claim 1, wherein the signal processing means comprises: a first memory for storing an audio reproduction signal between an edit start point and an edit end point extracted from the audio signal extraction unit; And a second memory for storing a video reproduction signal between an edit start point and an edit end point extracted from the video signal extraction unit. 2. The signal synthesizing apparatus according to claim 1, wherein said signal synthesizing means performs audio fade editing by synthesizing the two signals by crossfade editing with different weights being applied to the audio reproduction signal from the first memory and the audio recording signal applied from the outside. A first crossfade portion; A second crossfade unit for synthesizing the two signals by performing crossfade editing by adding different weights to the video data from the second memory and the video recording signal applied from the outside; And an audio / video signal synthesizing unit for synthesizing the audio fade editing signal and the video fade editing signal into a total recording signal to be recorded in the editing section. 5. The method of claim 4, wherein the crossfade editing adds a weight that is a gain value for adjusting the size of the signal. The editing start point gives a large weight to the playback signal, gives a small weight to the external input signal, and ends the editing point. VFA fade editing apparatus, characterized in that gradually up to the opposite weights.