JPH10164448A - Method and device for reproducing image for television broadcasting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decode the video data of specified broadcasting system, without a necessity for a user side terminal to store a decode program at all times by sending the decode program of video data and decoding the video program based on the decode program at the user side terminal, when sending the video data of specified broadcasting system from a broadcasting station. SOLUTION: A demultiplexer circuit 3 demultiplexes received signals into three-dimensional(3D) video data, sound/acoustic data sand 3D video decode program (program) and sends the 3D video data and the program to a DSP 4 for decoding the video data. When the specified broadcasting system is set at a reproducing mode setting part 6, the DSP 4 stores the program in a RAM 43 and decodes the 3D video data, but when an ordinary broadcasting system is set, the 3D video data are decoded by a decode program for ordinary video stored in a ROM 42, without storing the program in the RAM 43.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video reproducing method in a television broadcasting system and a video reproducing device in the television broadcasting system.

[0002]

2. Description of the Related Art In a digital television broadcasting system,
It is conceivable to transmit video data of a specific broadcast system, such as stereoscopic video data and high-definition video data used in HDTV (High Definition TV), from a broadcasting station.

For example, in order to reproduce stereoscopic video based on stereoscopic video data transmitted from a broadcasting station, a stereoscopic video decoder and a stereoscopic video display for decoding stereoscopic video data are required. Similarly, in order to reproduce high-definition video based on high-definition video data transmitted from a broadcasting station, a high-definition video decoder and a high-definition video display for decoding high-definition video data are required. Become.

By the way, in the process of realizing such a television broadcast, it is necessary to be able to receive such a broadcast even on a display that is compatible only with an existing ordinary broadcast system. Therefore, a video playback device that is applied to both a display that supports a specific broadcast system and a display that supports only a normal broadcast system will be developed.

However, in such a video reproducing apparatus, two types of decoding programs are used so that either a display corresponding to a specific broadcasting system or a display supporting only a normal broadcasting system may be connected. Must be remembered.

For example, when the video data of the specific broadcast system is stereoscopic video data, a stereoscopic video decoding program for obtaining a left-eye video signal and a right-eye video signal from the stereoscopic video data, and a stereoscopic video data It is necessary to store both of the included left-eye video data and right-eye video data and a normal decoding program for obtaining a normal video signal.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a novel video reproducing method in a television broadcasting system in which video data of a specific broadcasting system is decoded by a decoding program sent from a broadcasting station. I do.

According to the present invention, there is no need to store a decoding program for video data of a specific broadcast system, which is necessary only when a display corresponding to the specific broadcast system is connected. It is an object of the present invention to provide a video reproducing apparatus in a television broadcasting system capable of obtaining a decoding program for video data of a specific broadcasting system from a broadcasting station when connected.

[0009]

According to the present invention, there is provided a video reproducing method in a television broadcasting system, wherein a broadcasting station transmits video data of a specific broadcasting system other than the normal broadcasting system from the broadcasting station. Wherein the user terminal decodes the video data of the specific broadcast system sent from the broadcast station based on the decode program sent from the broadcast station.

In the video reproducing apparatus in the television broadcasting system according to the present invention, when video data of a specific broadcasting system other than the normal broadcasting system is transmitted from the broadcasting station, a decoding program of the video data is transmitted from the broadcasting station. Video playback device applied to a television broadcasting system,
A video playback apparatus that can be connected to both a display that supports only the normal broadcast system and does not support the specific broadcast system and a display that supports the specific broadcast system, and which transmits the video data of the specific broadcast system to a normal broadcast system. Storage means for storing a decoding program for decoding to a video signal suitable for a display which is compatible only with the specific system and which does not support the specific broadcast system, and a display which is compatible with the specific broadcast system when the display is connected. When a display that supports only one playback mode and the normal broadcast system is connected, the first playback mode is set by the setting unit and the setting unit that allow the user to set the second playback mode. In such a case, based on the decoding program sent from the broadcast station, the special The first decoding means for decoding the video data of the broadcast system, and when the second reproduction mode is set by the setting means, the first decoding means transmits the data from the broadcasting station based on the decoding program stored in the storage means. And a second decoding means for decoding the video data of the specific broadcast system.

[0011] Video data of a specific broadcast system is, for example,
It is stereoscopic video data. Alternatively, the video data of the specific broadcast system is, for example, high-definition video data.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration of a video reproducing apparatus of a user terminal in a digital television broadcasting system.
In this embodiment, it is assumed that stereoscopic video data, audio / sound data, and a stereoscopic video decoding program are transmitted from a broadcasting station. The stereoscopic video data includes left-eye video data and right-eye video data.

The video reproducing apparatus has an input terminal 1, a tuner 2, a demultiplexing circuit 3, a DSP 4, a CPU 5, a reproduction mode setting section 6, and an output terminal 7. DSP4 is
It decodes video data and includes a CPU 41, a ROM 42 for storing its programs and the like, and a RAM 43 for storing necessary data. R in DSP4
The OM 42 stores in advance a decoding program (referred to as a two-dimensional video decoding program) for decoding video data of a normal broadcast system. CPU5
The ROM 51 controls the entire video reproducing apparatus, and stores a program and the like, and an R 51 that stores necessary data.
AM52 is provided.

An antenna 100 is connected to the input terminal 1. The display 200 is connected to the output terminal 7. As the display 200, any of a display (hereinafter, referred to as a two-dimensional video display) compatible only with a normal broadcast system and a stereoscopic video display capable of displaying a stereoscopic video is connected. The playback mode is set in the playback mode setting section 6 by the user. That is, when a stereoscopic video display capable of displaying a stereoscopic video is connected to the output terminal 7, the user sets the first reproduction mode by the reproduction mode setting unit 6. When a display that supports only the normal broadcast system is connected to the output terminal 7, the user sets the second playback mode using the playback mode setting unit 6.

The CPU 5 controls the DSP 4 in accordance with the reproduction mode set by the reproduction mode setting section 6.

A signal from the antenna 100 is input to the tuner 2 via the input terminal 1. In tuner 2,
Processing such as frequency conversion and digital demodulation is performed. The output of the tuner 2 is sent to the demultiplexing circuit 3. The demultiplexing circuit 3 separates video data (stereoscopic video data), audio / sound data, and a stereoscopic video decoding program from the data sent from the tuner 2. voice·
The audio data is sent to a voice / audio decoder (not shown).

The operation will be described separately for the case where the first playback mode is set and the case where the second playback mode is set.

(1) Description of operation when first playback mode is set

When the first reproduction mode is set, the stereoscopic video decoding program obtained by the demultiplexing circuit 3 is stored in the RAM 43 in the DSP 4. The stereoscopic video data obtained by the demultiplexing circuit 3 is sent to the DSP 4.

The DSP 4 decodes stereoscopic video data based on a stereoscopic video decoding program stored in the RAM 43. As a result, a left-eye video signal and a right-eye video signal are obtained. The left-eye video signal and the right-eye video signal obtained by the DSP 4 are sent to the display (stereoscopic display) 200. Therefore, a stereoscopic image is displayed on the display 200.

(2) Description of operation when second reproduction mode is set

When the second reproduction mode is set, the stereoscopic video decoding program obtained by the demultiplexing circuit 3 is not stored in the RAM 43 in the DSP 4.

The stereoscopic video data obtained by the demultiplexing circuit 3 is sent to the DSP 4. DSP4 is ROM4
The decoding is performed on the left-eye data of the stereoscopic video data by using the 2D video decoding program stored in 2. As a result, a normal two-dimensional video signal is obtained. A normal two-dimensional video signal obtained by the DSP 4 is sent to a display (hereinafter referred to as a two-dimensional video display) 200. Therefore, a two-dimensional image is displayed on the display 200.

In the above-described embodiment, a digital television broadcasting system in which stereoscopic video data and a stereoscopic video decoding program are transmitted from a broadcasting station has been described. The present invention can also be applied to a digital television broadcasting system to which a fine video decoding program is transmitted.

[0027]

According to the video reproducing method in the television broadcasting system according to the present invention, video data of a specific broadcasting system is
Decoding can be performed by a decoding program sent from a broadcasting station.

In the video reproducing apparatus according to the present invention, there is no need to store a decoding program for video data of a specific broadcast system which is required only when a display corresponding to the specific broadcast system is connected. Further, in the video reproducing apparatus according to the present invention, when a display corresponding to a specific broadcast system is connected, a decoding program for video data of the specific broadcast system can be obtained from a broadcast station.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a video playback device in a digital television broadcasting system.

[Explanation of symbols]

 2 Tuner 3 Demultiplexing circuit 4 DSP 5 CPU 6 Reproduction mode setting unit 41 CPU 42 ROM 43 RAM 51 ROM 52 RAM

Claims (4)

[Claims] When a broadcast station transmits video data of a specific broadcast system other than a normal broadcast system, the broadcast station transmits a decode program of the video data from the broadcast station. A video reproduction method in a television broadcasting system for decoding video data of a specific broadcast system transmitted from the broadcast station based on a transmitted decode program. 2. When a broadcast station transmits video data of a specific broadcast system other than the normal broadcast system, a video reproduction system applied to a television broadcast system in which a decode program for the video data is transmitted from the broadcast station. A video playback device that can be connected to both a display that supports only the normal broadcast system and does not support the specific broadcast system and a display that supports the specific broadcast system, A storage means for storing a decoding program for decoding data into a video signal compatible with a display that does not support a specific broadcasting method and supports only a normal broadcasting method, and a display supporting a specific broadcasting method is connected. In this case, the first playback mode is set, and when a display that supports only the normal broadcast system is connected, the first playback mode is set.
Setting means for allowing the user to set the reproduction mode; when the first reproduction mode is set by the setting means, the reproduction mode is transmitted from the broadcasting station based on the decoding program transmitted from the broadcasting station. First decoding means for decoding the video data of the specific broadcast system, and when the second reproduction mode is set by the setting means, the first decoding means transmits the broadcast data from the broadcasting station based on the decoding program stored in the storage means. Video decoding apparatus for a television broadcasting system, comprising: a second decoding unit that decodes video data of a specific broadcast system sent thereto. 3. The video reproducing apparatus according to claim 2, wherein the video data of the specific broadcast system is stereoscopic video data. 4. The video reproducing apparatus according to claim 2, wherein the video data of the specific broadcast system is high definition video data.