JPH09294237A - Video recording and playback device - Google Patents

Abstract

(57) [Abstract] (Correction) [PROBLEMS] Recorded programs depending on the tendency of the distribution of level values of video signals and audio signals during recording of television broadcast and the broadcast mode without using a device such as a teletext decoder. The genre of contents is classified, and the genre information that is classified together with the date and time of recording and channel information is displayed at the time of reproduction so that the recorded contents can be easily grasped and usability is improved. SOLUTION: A means 8 for detecting a signal level from an audio signal in a television signal, a means 9 for detecting a signal level from a video signal, and a means 10 for discriminating a broadcast mode,
Means 7 for classifying the genre of contents of this television broadcast from the signal level of the audio signal, the signal level of the video signal, and the broadcast mode, means 11 for storing the information classified by the means for classifying this genre, and storage means. And means 12 for displaying the classification information of the recorded genre of the contents of the television broadcast stored together with the recorded information.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video recording / reproducing apparatus, and more particularly to a video recording / reproducing apparatus for judging program content from a television broadcast signal.

[0002]

2. Description of the Related Art As an example of prior art similar to such a device, a title of a program is taken out by a character multiplex broadcasting decoder described in Japanese Patent Laid-Open No. 7-21748 and stored in a memory together with program reservation information. The program title recorded on the video tape is displayed from the identification number. Since the data is transmitted from the broadcasting station, an accurate title can be recorded.

[0003]

However, in the above-mentioned prior art, although the title can be obtained from the program guide by the character multiplex broadcasting transmitted from the broadcasting station side, this program guide is not broadcast in all stations. Therefore, the titles of the programs of the broadcasting stations that have not transmitted the program guide cannot be extracted, and in this case, the program titles recorded on the video tape stored in the memory cannot be displayed. Further, there is a problem that it cannot be realized without using an expensive character multiplex broadcasting decoder. The present invention solves the above-mentioned problems of the prior art, and distinguishes the genres of recorded programs (for example, “sports”, “news”, “drama”, “movies”, “others”, etc.) at low cost, although they are not titles. It is an object of the present invention to provide a video recording / reproducing device that can be used.

[0004]

In order to solve the above-mentioned problems, the program content is recognized from the characteristics of the signal level of the audio signal or the video signal regardless of the information such as character information transmitted from the broadcasting station side. Each time a program is stored in a recording medium (for example, a video tape recorder or a video disc), the program recording image information (date and time, channel, recording mode, etc.) and the genre of the program are stored in a memory. The following means are provided in order to display the information of the program recorded on the recording medium when necessary.

(1) A means for discriminating the genre of program contents from audio signals and video signals.

(2) Memory means for storing program recording information and program genre information.

(3) Means for displaying the information stored in the memory.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the block diagram of FIG. In FIG. 1, 1 is an antenna,
2 is a tuner, 3 is an audio signal processing circuit, 4 is a video signal processing circuit, 5 is a recording medium, 6 is an identification number reading / writing circuit, and 7
Is a microcomputer (hereinafter referred to as a microcomputer), 8 is an audio level detector, 9 is a video signal level detector, 10 is a broadcast mode discriminator, 11 is a recording information storage circuit, 12 is a recording information display circuit, 13 is an operation switch, and The outline of the operation will be explained.

When recording a television broadcast program desired by the user, the radio wave of the television broadcast is transmitted to the antenna 1
Is input to the tuner 2 and supplied to the tuner 2. Tuner 2 selects a desired program. The program selected by the tuner 2 is output as an audio signal and a video signal by the audio signal processing circuit 3 and the video signal processing circuit 4. The audio signal and the video signal are also supplied to the recording medium 5.
Record audio and video signals with. Here, the recording medium 5 may be of any type as long as it can store a video signal and an audio signal, such as a magnetic tape, an optical disk, a magnetic disk, and a semiconductor memory. At the same time when the recording of the audio signal and the video signal is started, the identification number read / write circuit 6 records the identification number of the recording medium generated by the microcomputer 7 on the recording medium 5. For example, this identification number may be coded and written in the blanking portion of the video signal.

On the other hand, the signal output as the audio signal in the audio signal processing circuit 3 is supplied to the audio signal level detector 8. The audio signal level detector 8 detects the level of the audio signal and supplies the level to the microcomputer 7. The microcomputer 7 stores the signal level supplied from the audio signal level detector 8 inside the microcomputer 7.

On the other hand, the video signal output from the video signal processing circuit 4 as the video signal is detected by the video signal level detector 9
To supply. The video signal level detector 9 detects the level of the luminance signal and the color difference signal and supplies the level to the microcomputer 7. The microcomputer 7 stores the signal level supplied from the video signal level detector 9 inside the microcomputer 7. In addition, the signal from the tuner 2 is supplied to the broadcast mode discriminator 9, and the broadcast mode being received by the broadcast mode discriminator 10 (stereo, monaural, two languages).
Is determined and the information on the broadcast mode is supplied to the microcomputer 7.

The microcomputer 7 samples and stores the level values of the luminance signal and the color difference signal described above at an arbitrary frequency higher than the horizontal synchronizing frequency of the video signal. On the other hand,
The microcomputer 7 samples the value of the audio signal level described above at an arbitrary frequency higher than the vertical synchronizing frequency of the video signal.
To be stored. The stored luminance signal and color difference signal level values and audio signal level values, as well as broadcast mode information are processed in the microcomputer 7 to obtain a luminance signal level value tendency, a color difference signal level value tendency, and an audio signal. Judging from the tendency of the signal level and the broadcasting mode, the genre of the program currently received and recorded is sports, news, drama,
Classify into movies, music programs, etc.

The genre discrimination will now be described in detail. FIG. 2 is a PAD diagram showing an example of the mechanism of genre discrimination in the microcomputer 7. The level value of the luminance signal, the level value of the color difference signal, and the level value of the audio signal stored in the microcomputer 7,
It is temporally managed in units of one field. Therefore, first, if there is little temporal change in the value of the luminance signal level on one line and there is more green component from the value of the color difference signal level, it is said that a flat ground, stadium, or golf course is displayed. Judge and classify as "sports". When there are many temporal changes in the value of the luminance signal level in line units, and when there is a large change in the value of the luminance signal level in one field units (that is, the scene changes frequently), and also in line units If the distribution of the signal level values is constant, it is determined that the person is often reflected in a certain place, and it is classified as “news”. If the audio signal level values are often zero (that is, no audio) when the partial distribution of the signal level values is not constant on a line-by-line basis, it is determined that a person is moving and talking. ". Furthermore, if the broadcast mode of the television broadcast being received is bilingual, it is determined to be a Western movie and classified as "movie". In addition, when the value of the level of the luminance signal changes in units of one field, the broadcast mode is stereo broadcasting, and when the signal level of the audio signal is always relatively high, it is determined that music is frequently played. Music program ". In other cases, it is difficult to specify, so it is classified as "other". As described above, the genre of programs can be classified from the tendency of the temporal distribution of the level value of the luminance signal, the level value of the color difference signal, and the level value of the audio signal, and the broadcast mode. The classification mechanism shown in FIG. 2 is merely an example, and various combinations can be used to classify the genres in more detail.

The genre information classified by the microcomputer 7 as described above is written into the recording medium 5 through the recognition circuit read / write circuit 6 as well as recording start date / time, channel information, recording position on the recording medium, recording time, recording recording mode. It is stored in the recording information recording circuit 11 together with the identification number.

Then, when the recorded program is reproduced, the identification number written in the recording medium 5 is read by the identification number reading / writing circuit 6. The read identification number is microcomputer 7
To supply. The microcomputer 7 refers to the recording information stored in the recording information storage circuit 11 by the identification number. The microcomputer 7 supplies information to the recording information display circuit 12 so as to display a list of programs recorded on the recording medium 5 based on the recording information referred from the recording information storage circuit 11. The recording information display circuit 12 performs signal processing so as to output an image, and supplies it to the image signal processing circuit 4. The supplied signal is output by the video signal processing circuit 4.

FIG. 3 shows an example in which a list of recorded programs is displayed on a monitor. In FIG. 3, 14 is a monitor. The recording date, the day of the week, the recording start time, the channel at the time of recording, the genre information classified by the above, the recording time, in the order of recording based on the recording information read from the recording information storage circuit 11 on the monitor 14, The recording recording mode (in this case, the VHS standard recording mode is displayed) is displayed. By looking at this table, the user can
You can grasp the programs that are recorded in. For example, it is possible to obtain information that the program 2 recorded in the identification number 6 was recorded as "news" broadcasted on channel 10 from 10:00 pm on Monday, March 11 for 80 minutes in triple mode. When the operation switch 13 is operated, the microcomputer 7 discriminates the operation. For example, when the program number in the list shown in FIG. 3 is selected by the operation switch 13, the microcomputer 7 cues the number. The operation switch 13 can be used to select whether or not to display the list.

As described above, according to the present embodiment, it is possible to classify the program genre from the tendency of the distribution of the value of the level of the audio signal or the video signal and the broadcasting mode during the recording of the television program. Further, the recorded information can be grasped by storing this classification information as recording information and displaying it at the time of reproduction.

[0018]

As described above, the present invention has the following effects.

1) It is possible to determine the genre of a program without using a device such as a teletext decoder.

2) The information on the genre of the recorded program can be displayed during reproduction.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is an algorithm of the present invention.

FIG. 3 is a list display example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Antenna, 2 ... Tuner, 3 ... Audio signal processing circuit, 4 ... Video signal processing circuit, 5 ... Recording medium, 6 ... Identification number reading / writing circuit, 7 ... Microcomputer, 8 ... Audio signal level detector, 9 ... Video Signal level detector, 10 ... Broadcast mode discriminator, 11 ... Recording information storage circuit, 12 ... Recording information display circuit, 13 ... Operation switch, 14 ... Monitor.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Masayuki Kijima Inventor Masayuki Kijima 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Stock company Hitachi multimedia system development headquarters

Claims (7)

[Claims] 1. A video recording / reproducing apparatus for recording a television broadcast signal in a recording medium and reproducing the television broadcast signal from the recording medium, wherein the television broadcast signal is recorded in the television signal when the television broadcast signal is recorded. Means (8) for detecting a signal level from the audio signal, and a means (9) for detecting a signal level from a video signal in the television signal during recording of the television broadcasting signal, When recording, the means (10) for determining the broadcast mode in the television signal, the signal level of the audio signal, the signal level of the video signal, and the genre of the content of the television broadcast from the broadcast mode. Means for classifying (7), means (11) for recording the information classified by the means for classifying this genre, When reproducing the television broadcast signal, a means (12) for displaying the classification information of the genre of the recorded contents of the television broadcast stored in the storage means together with the recorded information is provided. Video recording / playback device. 2. The video recording / reproducing apparatus according to claim 1, wherein the means for classifying the genre of the contents of the television broadcast from the signal level of the audio signal, the signal level of the video signal, and the broadcast mode is the video signal. A video recording / reproducing apparatus characterized by categorizing genres by determining whether the signal level of the signal changes a lot. 3. The video recording / reproducing apparatus according to claim 1, wherein the means for classifying the genre of the contents of the television broadcast from the signal level of the audio signal, the signal level of the video signal, and the broadcast mode is the video signal. A video recording / reproducing apparatus characterized in that the genre is classified by determining whether there are many components of a specific color from the signal levels of the luminance signal and the color difference signal of the above. 4. The video recording / reproducing apparatus according to claim 1, wherein the means for classifying the genre of the content of the television broadcast from the signal level of the audio signal, the signal level of the video signal, and the broadcast mode is video. A video recording / reproducing apparatus characterized by categorizing genres by judging whether or not a position having a high signal level of a signal is at a certain position. 5. The video recording / reproducing apparatus according to claim 1, wherein the means for classifying the genre of the content of the television broadcast from the signal level of the audio signal, the signal level of the video signal, and the broadcast mode is audio. A video recording / reproducing device characterized by classifying genres by judging whether the signal level of a signal is large or small. 6. The video recording / reproducing apparatus according to claim 1, wherein the means for classifying the genre of the contents of the television broadcast from the signal level of the audio signal, the signal level of the video signal, and the broadcast mode is broadcast. A video recording / reproducing apparatus characterized by classifying genres by determining whether the mode is stereo, monaural, or bilingual. 7. A video recording / reproducing apparatus for recording a television broadcast signal on a recording medium and reproducing the television broadcast signal from the recording medium, wherein the recorded television is reproduced when the television broadcast signal is reproduced. A video recording / reproducing apparatus comprising: means (12) for displaying classification information of genres of broadcast contents together with recorded information.