KR100438719B1 - Apparatus and method for playing image signal - Google Patents

Abstract

The present invention relates to a video reproducing apparatus and method, and more particularly, to a video signal reproducing apparatus which always stores an input digital video signal and then re-views information stored in a predetermined time zone at the request of a viewer; It is about a method. A video signal reproducing apparatus is a device for decoding and reproducing a selected digital video signal. The video signal reproducing apparatus receives a video signal input from the outside or outputs a video signal excluding a header among the received video signals, and a video signal output from the gateway. Storage means for storing and outputting, decoding means for decoding the output signal of the gateway or the output signal of the storage means and outputting it as a reproduction signal, and storing the storage means when the operation of the gateway is stopped according to the inputted repetitive reproduction mode on signal. And controlling means for detecting the capacitive flag and outputting the stored video signal to the decoding means until the repeat playback mode off signal is input. According to the present invention, it is possible to re-view information of a time that has already passed without the intention of storing and playing back in advance, thereby providing the user with convenience of watching television.

Description

Apparatus and method for playing image signal

The present invention relates to a video reproducing apparatus and method, and more particularly, to a video signal reproducing apparatus which always stores an input digital video signal and then re-views information stored in a predetermined time zone at the request of a viewer; It is about a method.

In recent TVs, technology such as Picture-In-Picture, Picture-Out-Picture, etc. enables double screen or multi screen display. Do. Thus, it is possible to simultaneously watch broadcast signals of at least two different channels. In addition, when a user who is watching the input video or audio information wants to view the desired information again, a general replay medium generally stores a predetermined time from a desired time and then watches again. In other words, when the viewer intends to save, the user can store a certain time period therefrom and watch. However, if the user wants to watch the information that has already passed while watching the television without the user's intention, there is no information stored in advance, which causes inconvenience.

The technical problem to be achieved by the present invention is to provide a video signal reproducing apparatus that can always store the input digital video signal and then view the previously stored information of the predetermined time zone at the request of the viewer.

Another technical problem to be solved by the present invention is to provide a video signal reproducing method which always stores an input digital video signal and then re-views information stored in a predetermined time zone at the request of a viewer.

1 is a block diagram showing the configuration of a video signal reproducing apparatus according to the present invention.

2 is a block diagram showing the configuration of another embodiment of a video signal reproducing apparatus according to the present invention.

3 is a flowchart illustrating an operation of a video signal reproducing method according to the present invention.

The video signal reproducing apparatus for solving the technical problem to be achieved by the present invention is a device for decoding and playing the selected digital video signal, the video signal received from the outside or the video signal except the header of the received video signal A gateway to output the; Storage means for storing and outputting an image signal output from the gateway; Decoding means for decoding the output signal of the gateway or the output signal of the storage means and outputting it as a reproduction signal; And controlling the controller to detect the storage capacity flag of the storage means and output the stored video signal to the decoding means until the repeat play mode off signal is input when the operation of the gateway is stopped according to the inputted repeat play mode on signal. It is preferred to include means.

In the present invention, the gateway is characterized in that it comprises a switching unit for switching the video signal other than the header of the video signal received from the external or received video signal.

In the present invention, the decoding means is characterized in that the synchronization of the video signal to be reproduced and output, that is, the video signal and the audio signal equally.

In the present invention, the control means detects the storage capacity flag of the storage means, if the storage means is completely overwritten when all of the image signal input from the outside or received video signal, except the header of the received production signal is excluded (Overwrite) to save the data from the beginning.

In the present invention, the control means detects a storage capacity flag of the storage means when the repeat playback mode on signal is received, and when the storage capacity flag is set, the repeat playback mode of the storage means is turned on. The control signal to be sequentially outputted to the decoding means from the time point to the end and from the beginning of the storage means to the time when the repeat play mode is turned on, or when the repeat play mode on signal is received, the storage capacity of the storage means. When the flag is detected and the storage capacity flag is unset, the control unit outputs the generated signal to the decoding unit from the beginning of the storage unit to the time when the repetitive reproduction mode is turned on.

According to an aspect of the present invention, there is provided an apparatus for reproducing and reproducing a selected digital image signal, comprising: storage means for performing a storage and output operation by a storage and output control signal; Receives a video signal input from the outside or generates a storage or output control signal and a bypass signal to the storage means for a video signal excluding a header among the received video signals. A control means for stopping a storage operation and a bypass operation to the means and detecting a storage capacity flag of the storage means to output an image signal stored in the storage means until a repeat playback mode off signal is received; And decoding means for decoding the video signal output from the storage means or the video signal bypassed under the control of the control means and outputting the video signal as a reproduction signal.

In the present invention, the decoding means is characterized in that the synchronization of the video signal to be reproduced and output, that is, the video signal and the audio signal equally.

In the present invention, the control means detects the storage capacity flag of the storage means, if the storage means is completely overwritten when all of the image signal input from the outside or received video signal, except the header of the received production signal is excluded (Overwrite) to save the data from the beginning.

In the present invention, the control means detects a storage capacity flag of the storage means when the repeat playback mode on signal is received, and when the storage capacity flag is set, the repeat playback mode of the storage means is turned on. The control signal to be sequentially outputted to the decoding means from the time point to the end and from the beginning of the storage means to the time when the repeat play mode is turned on, or when the repeat play mode on signal is received, the storage capacity of the storage means. When the flag is detected and the storage capacity flag is unset, a control signal is output to the decoding means from the beginning of the storage means to the time when the repetitive reproduction mode is turned on.

According to another aspect of the present invention, there is provided a method of reproducing a video signal, which includes: (a) outputting a video signal input from the outside or a video signal excluding a header from a received video signal to a decoder and storing the same in a memory; step; And (b) when the repeat play mode signal is input during the operation (a), stops the operation of (a) and outputs the video signal stored in the memory to the decoder until the repeat play mode off signal is input. It is preferred to include the step.

In the present invention, it is characterized in that the synchronization of the video signal, that is, the video signal and the audio signal decoded after the step (b) is equally converted and output.

In the present invention, in the step (a), the storage capacity flag of the memory is detected, and when the storage area of the memory is completely stored as the image signal, overwriting (overwrite) to store the data again from the beginning. To be characterized.

In the present invention, in the step (b), when the repeat play mode on signal is input, the repeat play mode of the memory is turned on when the storage capacity flag is set by detecting the storage capacity flag of the memory. The output signal is sequentially output to the decoder from the beginning to the end of the memory and from the beginning of the memory to the time when the repeat playback mode is turned on, or when the repeat playback mode on signal is input, the storage capacity flag of the memory is detected and the When the storage capacity flag is unset, the video signal from the beginning of the memory to the time when the repeat play mode is turned on is output to the decoder,

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

1 is a block diagram showing the configuration of a video signal reproducing apparatus according to the present invention, in which a tuner 100, a DVD player 101, a gateway 102, a ring buffer 103, a DMA 104, and a ring buffer controller ( 105, and a decoder 106. In the present invention, the gateway 102 includes a main controller 102-1 and a switching unit 102-2.

Next, the present invention will be described in detail with reference to FIG.

The tuner 100 demodulates 8VSB, FDM, QAM, etc. among the broadcast signals to obtain A / V data, that is, a transport stream (TS), and transmits the same to the gateway 102.

The DVD player 101 extracts a program stream (PS) from the DVD media and transmits it to the gateway 102.

The gateway 102 receives the TS from the tuner 100 and the PS from the DVD player 101 and transmits the PS to the ring buffer 103 and the decoder 106. The gateway 102 has a main control unit 102-1 and a switching unit 102-2 that control the entire system. Among them, the switching unit 102-2 switches the input TS or PS to be transmitted to the ring buffer 103 and the decoder 106, or PES (Packetized Elementary Stream) from which the header is removed from the input TS or PS. The switch can be transmitted to the ring buffer 103 and the decoder 106. In addition, the gateway 102 receives a repetitive reproduction on / off signal, which is a user input signal input from an IR terminal (not shown).

The ring buffer 103 stores the TS, PS or PES transmitted through the gateway 102. The ring buffer 103 is a preset area of the storage and may be a semiconductor RAM or an HDD. The ring buffer 103 is written in software by writing a write pointer (address pointer of the ring buffer 103 to store data) and a ring buffer full flag (ring buffer 103 for the first time). Move, the Ring buffer Full flag is set). The operation of the initial ring buffer 103 is a state in which the ring buffer full flag is unset, and the write pointer indicates the first address of the ring buffer 103. As the data, that is, TS, PS or PES is loaded into the ring buffer 103, the write pointer increases by the amount of loaded data. It will overwrite the data loaded in. Thereafter, it is not necessary to set the ring buffer full flag when loading data. The storage operation and the overwrite operation of the ring buffer 103 are controlled by hardware or software by the ring buffer controller 105.

The direct memory access (DMA) 104 transmits a TS, PS or PES stored in the ring buffer 103 to the decoder 106 when a repetitive reproduction on signal is input by the user.

The main controller 102-1 may be provided inside or outside the gateway 102, and controls overall system operations such as the ring buffer controller 105, the gateway 102, and the DMA 104.

The decoder 106 decodes the data transmitted from the ring buffer 103 through the gateway 102 or the DMA 104 and outputs it as a reproduction signal. The decoder 106 converts the video data and the audio data to be decoded so that the synchronization is the same, decodes them, and outputs them as reproduction signals. The decoder 106 may be divided into an audio decoder (not shown) and a video decoder (not shown), and may convert the synchronization according to the separation of the audio decoder and the video decoder into hardware or software in the same manner.

When the user inputs a repeat play mode on signal to an input device such as a remote controller (not shown), the main control unit 102-1 receives the TS and PS input to the ring buffer control unit 105 to the gateway 102. Or outputs a control signal to stop transmitting the PES to the ring buffer 103 and the decoder 106. The ring buffer controller 105, which has received the control signal from the main controller 102-1, searches for the ring buffer full flag and the DMA 104 starts from the beginning of the ring buffer 103 when the ring buffer full flag is not set. If the write pointer is transmitted to the decoder 106, and the Ring buffer Full flag is set, the DMA 104 recursively rotates the decoder 106 from the beginning to the end and from the beginning to the write pointer of the ring buffer 103. To be sent to. At this time, the operation of the DMA 104 is controlled by the main control unit 102-1. This repeat playback operation continues until a repeat playback off signal is input by the user.

2 is a block diagram showing a configuration of another embodiment of a video signal reproducing apparatus according to the present invention, which includes a tuner 200, a DVD player 201, a ring buffer controller 202, a ring buffer 203 gateway 204, It consists of a decoder 205. In the present invention, the gateway 204 includes a main control unit 204-1.

Next, the present invention will be described in detail with reference to FIG.

The tuner 200 demodulates 8VSB, FDM, QAM, etc. among the broadcast signals to obtain A / V data, that is, a transport stream (TS), and transmits the same to the ring buffer controller 202.

The DVD player 201 extracts a program stream (PS) from DVD media and transmits it to the ring buffer controller 202.

The ring buffer control unit 202 receives the TS from the tuner 200 and the PS from the DVD player 201 and uses this signal as it is, or uses the ring buffer 203 and the decoder (PES having the header removed from the TS or PS). 205). The ring buffer controller 202 stores or outputs the video signal to the ring buffer 203 under the control of the main controller 204-1, and outputs the video signal to the decoder 205.

The ring buffer 203 stores the TS, PS or PES transmitted through the ring buffer controller 202. The ring buffer 203 is a preset area of the storage and may be a semiconductor RAM or an HDD. The ring buffer 203 is written in software by writing the write pointer (address pointer of the ring buffer 203 where the data is to be stored) and the ring buffer full flag (the ring buffer 203) for the first time. Move, the Ring buffer Full flag is set). The operation of the initial ring buffer 203 is a state in which the ring buffer full flag is unset, and the write pointer indicates the first address of the ring buffer 203. As the data, that is, TS, PS, or PES is loaded into the ring buffer 203, the write pointer increases by the amount of the loaded data. It will overwrite the data loaded in. Thereafter, it is not necessary to set the ring buffer full flag when loading data. The storage operation and the overwrite operation of the ring buffer 203 are controlled by hardware or software by the ring buffer controller 202.

The gateway 204 transmits the video signal output from the ring buffer controller 202 or the video signal stored in the ring buffer 203 to the decoder 205. The main controller 204-1 may be provided inside or outside the gateway 204 and control overall system operation of the ring buffer controller 202 and the gateway 204.

The decoder 205 decodes the data transmitted from the ring buffer control unit 202 or the ring buffer 203 through the gateway 204 and outputs it as a reproduction signal. The decoder 205 converts the video data and the audio data to be decoded so that the synchronization is the same, decodes them, and outputs them as reproduction signals. The decoder 205 may be divided into an audio decoder (not shown) and a video decoder (not shown), and the synchronization according to the separation of the audio decoder and the video decoder may be identically converted in hardware or software.

When the user inputs a repeat play mode on signal to an input device such as a remote controller (not shown), the main controller 204-1 receives this, and the TS, PS or PES input to the ring buffer controller 202 is ring buffered. 203 and a control signal to stop transmitting to the decoder 205. The ring buffer control unit 202 receiving the control signal of the main control unit 204-1 searches for the ring buffer full flag and, if the ring buffer full flag is not set, the decoder (from the beginning of the ring buffer 203 to the write pointer) 205, and when the Ring buffer Full flag is set, it transmits to the decoder 205 cyclically from the next to the end of the write pointer of the ring buffer 103 and from the beginning to the write pointer. This repeat playback operation continues until a repeat playback off signal is input by the user.

3 is a flowchart illustrating an operation of a method of reproducing a video signal according to the present invention, and storing an input PS (Transport Stream), TS (Transport Stream), or PES (Packetized Elementary Stream) in a ring buffer and outputting the same to a decoder. 300, determining whether the full flag of the ring buffer is set (301); overwriting data in the ring buffer (302); determining whether a repetitive playback signal is input from the user. Step 303, stop transmission to the decoder of PS, TS or PES and stop storage to the ring buffer 304, determining whether the Full flag of the ring buffer is set (305), write pointer of the ring buffer ( Write Pointer) sequentially transmitting from the beginning of the Ring buffer to the write pointer from the beginning of the Ring buffer to the decoder (306), and sequentially transmitting the decoder from the beginning of the Ring buffer to the write pointer (307), repeating The playback stop signal input step 308 is performed, and the input PS, TS or PES is stored in the ring buffer and output to the decoder at the same time (309).

Next, the present invention will be described in detail with reference to FIGS. 1 and 3.

Referring to FIG. 3, the video signal reproducing method is stored in the ring buffer 103 and output to the decoder 106 at the same time (step 300). The TS is transmitted from the tuner 100, and the PS is transmitted from the DVD player 101 and input to the gateway 102. The switching unit 102-2 is provided inside the gateway 102. The switching unit 102-2 switches the input TS or PS to be transmitted to the ring buffer 103 and the decoder 106, or switches the PES from which the header is removed from the TS or PS to the ring buffer 103 and To be transmitted to the decoder 106.

It is determined whether the Full flag of the ring buffer 103 is set (step 301). The ring buffer controller 105 detects the full flag of the ring buffer 103, and when the full flag of the ring buffer 103 is set, the data is overwritten in the ring buffer 103 from the beginning. (Step 302). The ring buffer 103 is written in software by writing a write pointer (address pointer of the ring buffer 103 to store data) and a ring buffer full flag (ring buffer 103 for the first time). Move, the Ring buffer Full flag is set). The operation of the initial ring buffer 103 is a state in which the ring buffer full flag is unset, and the write pointer indicates the first address of the ring buffer 103. As the data, that is, TS, PS or PES is loaded into the ring buffer 103, the write pointer increases by the amount of loaded data. It will overwrite the data stored in. Thereafter, it is not necessary to set the ring buffer full flag when loading data.

When a repeat playback signal (repeated playback mode on signal) is input from the user, the ring buffer control section 105 controls to stop transmission of the PS, TS or PES to the decoder 106 and to stop storing in the ring buffer 103. (Step 304),

When transmission of the PS, TS or PES to the decoder 106 is stopped and storage to the ring buffer 103 is stopped, the ring buffer controller 105 determines whether the full flag of the ring buffer 103 is set (step 305).

When the Full flag of the ring buffer 103 is set, the DMA 104 transmits to the decoder 106 sequentially from the end of the write pointer to the end of the ring buffer 103 and from the beginning of the ring buffer to the write pointer. (Step 306).

If the Full flag of the ring buffer 103 is not set, the DMA 104 transmits from the beginning of the ring buffer 103 to the decoder 106 from the beginning of the ring buffer 103 to the decoder 106 (step 307). The data transmitted to the decoder 106 is decoded, and the synchronization of video data and audio data is equally converted and output as a reproduction signal.

When the repeat playback stop signal (repeat play mode off signal) is input by the user, the repeat play operation stops and the PS, TS or PES input is stored in the ring buffer 103 and outputted to the decoder 106 at the same time (308, Step 309).

The present invention is not limited to the above-described embodiments and can be modified by those skilled in the art within the spirit of the invention.

As described above, according to the present invention, it is possible to re-view information of a time that has already passed without the intention of storing and playing back in advance, thereby providing the user with convenience of watching television.

Claims (16)

An apparatus for decoding and playing a selected digital video signal, A gateway for receiving a video signal input from the outside or outputting a video signal excluding a header among the received video signals; Storage means for storing and outputting an image signal output from the gateway; Decoding means for decoding the output signal of the gateway or the output signal of the storage means and outputting it as a reproduction signal; And Control means for detecting the storage capacity flag of the storage means to output the stored video signal to the decoding means until the repeat playback mode off signal is input when the operation of the gateway is stopped according to the input of the repeat playback mode on signal input Image signal reproduction apparatus comprising a. The method of claim 1, wherein the gateway And a switching unit for switching an image signal input from an external source or an image signal except a header among the received image signals. The method of claim 1 wherein said decoding means And a video signal to be reproduced and output, i.e., a video signal and an audio signal. The method of claim 1, wherein the control means Detects the storage capacity flag of the storage means, and if the storage means is entirely stored as an image signal without a header among the image signals received from the outside or the received production signal, the data is overwritten again. And playback control. The method of claim 1, wherein the control means When the repeat playback mode on signal is received, the storage capacity flag of the storage means is detected and the storage capacity flag is set, from the time point when the repeat playback mode of the storage means is turned on to the end of the storage means. And a video signal from the beginning to a point in time at which the repetitive reproduction mode is turned on is sequentially output to the decoding means. The method of claim 1, wherein the control means When the repeat play mode on signal is received, the storage capacity flag of the storage means is detected, and when the storage capacity flag is unset, the production signal from the beginning of the storage means to the time when the repeat play mode is turned on. And outputting the signal to the decoding means. An apparatus for decoding and playing a selected digital video signal, Storage means for performing storage and output operations by means of a storage and output control signal; Receives a video signal input from the outside or generates a storage or output control signal and a bypass signal to the storage means for a video signal excluding a header among the received video signals. A control means for stopping a storage operation and a bypass operation to the means and detecting a storage capacity flag of the storage means to output an image signal stored in the storage means until a repeat playback mode off signal is received; And And decoding means for decoding the video signal output from the storage means or the bypassed video signal under the control of the control means and outputting the decoded video signal as a reproduction signal. 8. A method according to claim 7, wherein the decoding means is And a video signal to be reproduced and output, i.e., a video signal and an audio signal. The method of claim 7, wherein the control means Detects the storage capacity flag of the storage means, and if the storage means is entirely stored as an image signal without a header among the image signals received from the outside or the received production signal, the data is overwritten again. And playback control. The method of claim 7, wherein the control means When the repeat playback mode on signal is received, the storage capacity flag of the storage means is detected and the storage capacity flag is set, from the time point when the repeat playback mode of the storage means is turned on to the end of the storage means. And a video signal from the beginning to a point in time at which the repetitive reproduction mode is turned on is sequentially output to the decoding means. The method of claim 7, wherein the control means When the repeat play mode on signal is received, the storage capacity flag of the storage means is detected, and when the storage capacity flag is unset, the production signal from the beginning of the storage means to the time when the repeat play mode is turned on. And outputting the signal to the decoding means. (a) outputting a video signal input from the outside or a video signal excluding a header among the received video signals to a decoder and storing the same in a memory; And (b) if the repeat play mode signal is input during the step (a), stopping the step (a) and outputting the video signal stored in the memory to the decoder until the repeat play mode off signal is input. Play method comprising a. The method of claim 12, wherein after step (b) And reproducing the same synchronization of the decoded video signal, that is, the video signal and the audio signal. 13. The method of claim 12, wherein in step (a), a storage capacity flag of the memory is detected, and when the storage area of the memory is completely stored as the image signal, the memory is overwritten by overwriting. The playback method characterized in that. The method of claim 12, wherein step (b) When the repeat play mode on signal is input, when the storage capacity flag of the memory is detected and the storage capacity flag is set, repeating from the time when the repeat play mode of the memory is turned on and from the beginning of the memory And a video signal up to a point in time at which the playback mode is turned on is sequentially output to the decoder. The method of claim 12, wherein step (b) When the repeat playback mode on signal is input, when the storage capacity flag of the memory is detected and the storage capacity flag is reset, the video signal from the beginning of the memory to the time when the repeat playback mode is turned on is detected. A video signal reproduction method characterized by outputting to a decoder.