KR100802607B1 - Skip stream reproducing appatratus and method for digitatl broadcasting receiver - Google Patents

Abstract

The present invention relates to an apparatus and a method for reproducing a skip stream of a digital broadcasting receiver, and more particularly, to output a skip stream when a skip operation is set while simultaneously decoding a current playback stream and a skip stream having different storage points read from a storage medium. It is done. The present invention for this purpose stores a tuner / demodulator 210 for demodulating (demodulation) the digital TV signal input from the antenna, and the TP stream input from the tuner / demodulator 210 in the unit of packets to the hard disk 280 And a stream controller 220 for reading two TP streams having a predetermined time interval stored in the hard disk 280 and outputting them simultaneously in a multi-channel, and each TP stream input from the stream controller 220 to each MPEG. MPEG decoders 240 and 260 that are stored and decoded in the memory 230 and 250, and A / V which selects and outputs one output signal of the MPEG decoders 240 and 260 depending on whether a skip operation is set. When the skip operation is set by the switch 270, the A / V switch 270 is configured to switch the output selection of the MPEG decoder 240 and 260 to output the skip stream as the current playback stream. Featured .

Description

SKIP STREAM REPRODUCING APPATRATUS AND METHOD FOR DIGITATL BROADCASTING RECEIVER}

1 is a block diagram of a conventional skip stream reproducing apparatus.

2 is a block diagram of an apparatus for one embodiment of the present invention.

3 is a block diagram of an apparatus for another embodiment of the present invention.

4 is an exemplary view showing stream multiplexing in another embodiment of the present invention.

5 is an exemplary view showing a skip stream input time point in an embodiment of the present invention.

Fig. 6 is a flowchart of operation for conventional skip stream reproduction.

7 is an operation flowchart for skip stream reproduction in one embodiment of the present invention;

8 is an operational flowchart for skip scrim reproduction in another embodiment of the present invention.

** Explanation of symbols on the main parts of the drawing **

210,310 tuner / demodulator 220,320 stream controller

230,250,330: MPEG memory 240,260,340: MPEG decoder

270: A / V switch 350: PID controller

The present invention relates to digital broadcast receivers, and more particularly, to an apparatus and method for stream skip reproduction.

In the digital broadcasting receiver, a received stream is stored in a storage medium and played simultaneously or a received stream is stored in a storage medium and then played again.

As a storage medium, a hard disk (HDD) is usually used.

1 is a block diagram of a conventional stream skip reproducing apparatus, as shown therein, a tuner / demodulator 110 for demodulating a digital TV signal input from an antenna, and a packet unit from the tuner / demodulator 110. A stream controller 120 for storing the TP (Transport) stream inputted to the hard disk 150 and simultaneously reading and outputting the stream stored in the hard disk 150, and the TP stream input from the stream controller 120. The MPEG decoder 140 stores and decodes the MPEG memory 130.

The operation of the conventional apparatus will be described with reference to the operation flowchart of FIG. 6 as follows.

The digital TV signal input from the antenna is demodulated into a TP stream in a packet unit at the tuner / demodulator 110 and input to the stream controller 120.

The stream controller 120 reads a specific stream from the hard disk 150 and inputs it to the MPEG decoder 140 to simultaneously store the packet-based TP stream on the hard disk 150.

The MPEG decoder 140 stores the TP stream input from the stream controller 120 in the MPEG memory 130 and decodes the same to output audio / video (A / V).

If the user requests a skip operation for moving back and playing from a current point of time, the MPEG decoder 140 mutes the audio / video (A / V) output currently being played and simultaneously streams the stream. The controller 120 moves the stream read pointer of the hard disk 150 to be read backward by a skip interval time.

At this time, the stream controller 120 reads the stream at the time point moved backward by a predetermined time point to be skipped from the hard disk 150 and inputs to the MPEG decoder 140.

Accordingly, the MPEG decoder 140 stores and decodes the TP stream input from the stream controller 120 in the MPEG memory 130 and then turns on the audio / video (A / V) output to turn on the audio / video (A / V). Will print

However, in the conventional case, the response time from the screen currently being played back to the screen after a certain point in time when the skip operation is performed is the read pointer movement time of the hard disk, the stream read time from the hard disk, the stream controller and the MPEG. There was a problem in that it became as long as the sum of the first picture decoding time in the decoder.

In addition, conventionally, there is a problem that the screen is stopped or the screen is broken due to a transient phenomenon caused by the change of the audio / video (A / V) output during the skip operation.

Accordingly, in order to solve the conventional problem, the present invention provides a digital broadcasting system in which one stream stored in a storage medium reads and decodes a current playback stream and a skip stream having different storage points at the same time and outputs a skip stream when a skip operation is set. An object of the present invention is to provide an apparatus and method for skip stream reproduction of a receiver.

In order to achieve the above object, the present invention provides a stream controller that simultaneously stores a demodulated TP stream on a hard disk, and simultaneously reads a current stream of a predetermined packet unit and a stream for skipping from the hard disk to a multi-channel terminal. And a plurality of MPEG decoders for decoding respective streams output from the stream controller, and a stream signal that is currently reproduced among the output signals of the plurality of MPEG decoders is selected and output, and a skip stream signal is selected and output when a skip operation is set. It is characterized by comprising an A / V switch.

In order to achieve the above object, the present invention also reads a packet unit stream for a current playback stream or skip stream from a storage medium in which one demodulated TP stream is stored, and changes a packet identifier (PID). A PID controller, a stream controller which stores a demodulated TP stream on a hard disk, reads a stream of a predetermined packet unit, and multiplexes the stream output from the PID controller, and decodes the multiplexed stream output from the stream controller. It is characterized by comprising an MPEG decoder which selects and outputs a stream signal to be reproduced currently and selects and outputs a skip stream signal when a skip operation is set.

In order to achieve the above object, the present invention simultaneously provides a stream of a predetermined packet unit from a storage medium and a stream of a predetermined packet unit having a different storage time point for a predetermined time from the storage medium as a stream currently being reproduced and a stream for skipping. Reading, decoding each of the streams read at the same time, determining whether a skip operation is set while outputting a current playback stream, and if the skip operation is determined to be set in the skip operation, Characterized in that it comprises a step of outputting.

In order to achieve the above object, the present invention also comprises the steps of simultaneously reading a stream of a predetermined packet unit and a stream having a different storage time for a predetermined time from the storage medium as a stream for each current playback and a stream for skipping; Changing a packet identifier (PID) such that a current packet to be read and a stream for skip are assigned different packet identifiers; and multiplexing and decoding the streams to which different identifiers are assigned. Determining whether the skip operation is set while outputting the current playback stream; and outputting the decoded skip stream when it is determined that the skip operation is set.

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

In the embodiments of the present invention, a detailed description of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.                     

Figure 2 is a block diagram of a skip stream reproducing apparatus for an embodiment of the present invention, as shown therein, a tuner / demodulator 210 for demodulating a digital TV signal input from an antenna, and the tuner / demodulator. A stream controller 220 for storing the TP stream inputted in units of packets from the 210 in the hard disk 280 and reading two TP streams having a predetermined time interval stored in the hard disk 280 and simultaneously outputting them in multi-channels. And MPEG decoders 240 and 260 for storing and decoding respective TP streams input from the stream controller 220 in respective MPEG memories 230 and 250, and the MPEG according to whether skip operation is set. The A / V switch 270 selects and outputs one output signal from the decoders 240 and 260.

The operation and the effect of the embodiment of the present invention configured as described above will be described with reference to the operation flowchart of FIG. 7.

The stream to be reproduced among the streams stored in the hard disk 280 is input to the MPEG decoder 240 through the stream controller 220 and at the same time a skip interval time from the stream currently reproduced from the hard disk 280. As long as the previous stream is read, it is input to the MPEG decoder 260 through the stream controller 220.

That is, the stream controller 220 simultaneously outputs two streams having different storage time points to the MPEG decoder 240 and 260 for the same stream, respectively.

At this time, the MPEG decoders 240 and 260 store the respective streams in the MPEG memory 230 and 250 to decode the streams.                     

Here, it is assumed that the MPEG decoder 240 decodes a stream to be reproduced currently, and the MPEG decoder 260 decodes a stream to be skipped.

At this time, the A / V switch 270 determines whether the output terminal should be switched to the skip operation setting by the user while selectively outputting the current playback stream decoded by the MPEG decoder 240.

Accordingly, when the skip operation is not set, the A / V switch 270 continuously selects the output signal of the MPEG decoder 240 and outputs it to the outside.

Subsequently, when the skip operation is set by the user, the A / V switch 270 selects the output signal of the MPEG decoder 260 and outputs it to the outside.

In this case, the skip stream, which was previously decoded for the current playback stream prior to the skip operation, is inputted and decoded by a skip interval time for the current stream.

The above operation is repeatedly performed whenever the skip operation is set by the user.

3 is a block diagram of an apparatus for another embodiment of the present invention, as shown therein, a tuner / demodulator 310 for demodulating a digital TV signal input from an antenna and one TP stream are stored. A PID controller 350 for changing a packet identifier (PID) by reading one of the streams currently being played or a stream for skipping from the existing hard disk 360, and storing the demodulated TP streams in the hard disk 360. A stream controller 320 that reads one stream from the hard disk 360 and multiplexes the stream output from the PID controller 350, and simultaneously decodes and skips the multiplexed stream output from the stream controller 320. It consists of an MPEG decoder 340 for outputting one of the decoded signals according to the setting.

Referring to the operation flow chart of Figure 8 the operation and effect of another embodiment of the present invention configured as described above are as follows.

The stream to be currently played among the streams stored in the hard disk 360 is input to the stream controller 320, and at the same time, the previous stream is read from the hard disk 360 by a skip interval time for the current playback stream. It is input to the controller 350.

Here, it is assumed that a stream to be reproduced currently is input to the stream controller 320 and a stream for skipping is input to the PID controller 350.

The PID controller 350 assigns a packet identifier (PID) different from the stream currently being reproduced to the stream controller 320 to the stream controller for skipping.

The stream controller 320 multiplexes two input streams in packet units and outputs the result to the MPEG decoder 340.

That is, when two streams as shown in FIG. 4 (a) and (b) are input, the stream controller 320 multiplexes them as shown in FIG. 4 (c) and inputs them to the MPEG decoder 340.

Here, it is assumed that the stream currently playing the stream of FIG. 4 (a) and the stream of FIG. 4 (b) are skip streams.                     

The MPEG decoder 340 divides two streams of the multiplexed streams by different packet identifiers, stores them in the MPEG memory 330, and decodes them simultaneously.

At this time, the MPEG decoder 340 determines whether the skip operation is set while outputting the current playback stream.

Accordingly, when the skip operation is not set, the MPEG decoder 340 is an example of the stream currently being reproduced. For example, the MPEG decoder 340 decodes the stream of FIG. 4 (a) and continuously outputs it to the outside through the audio / video (A / V) output terminal. .

Subsequently, when the skip operation is set by the user, the MPEG decoder 340 decodes the stream shown in FIG. 4 (b) as an example of the skip stream and outputs the output to the outside through the audio / video (A / V) output terminal.

In this case, the skip stream input from the hard disk 360 to the PID controller 350 is different from the packet identifier of the stream currently inputted by a stream before the current time being skipped based on the stream being played back. Another packet identifier is given.

The above operation is repeatedly performed whenever the skip operation is set by the user.

On the other hand, one embodiment and another embodiment of the present invention will be briefly described with reference to the exemplary diagram of FIG.

One TP stream is stored in the hard disk 280/360, and a stream different from the hard disk 280/360 for the same stream, that is, the stream A currently played in FIG. The previous stream (B stream) is simultaneously read by a skip interval time with respect to the stream currently being played.

Accordingly, in one embodiment, two streams (A stream and B stream) are input and decoded by the respective MPEG decoders 240 and 260, and the A / V switch 270 outputs the output signal of the MPEG decoder 240. When the skip operation is set while being selected and output to the outside, the output signal of the MPEG decoder 260 is selected and output to the outside.

In the above embodiment, when the output signal of the MPEG decoder 260 is output to the outside as the skip operation setting, the MPEG decoder 240 decodes a stream before a predetermined time based on the stream B stream currently being reproduced.

In another embodiment, the MPEG decoder 340 outputs one stream A of the multiplexed streams to the outside, and then outputs another stream B to the outside when the skip operation is set.

In another embodiment, when the skip operation is set, the stream for skip input to the MPEG decoder 260 is a stream before a predetermined time based on the stream currently being played.

That is, in one embodiment and another embodiment of the present invention, whenever a skip operation is set, a stream before a predetermined time is input as a stream for skipping based on the stream currently being reproduced as shown in FIG.

 As described in detail above, the present invention simultaneously decodes a stream to be played and a stream for skip, and when a skip operation is set, the stream for skip is converted to a stream to be played at present. There is no response delay time until the rear screen is displayed, thereby increasing the user's satisfaction.

In addition, since the present invention only needs to control whether to output the decoded result during the skip operation, there is no transient phenomenon (picture freeze or screen break) caused by the change of the audio / video (A / B) output, thereby improving the reliability of the product. It has an effect.

Claims (5)

A stream controller that simultaneously reads and outputs streams currently being skipped and streams for skipping from a storage medium in which one demodulated TP stream is stored, and a plurality of MPEG decoders that respectively decode a plurality of streams output from the stream controller And an A / V switch for selectively outputting a stream to be currently reproduced among the decoded streams and outputting a stream for skipping to a stream to be currently reproduced when a skip operation is set. Skip stream playback device in receiver. A PID controller for changing a packet identifier (PID) so that different packet identifiers are read from a stream currently being reproduced from a storage medium storing one demodulated TP stream and a stream for skipping, and a demodulated A stream controller that reads one stream while simultaneously storing a TP stream on a hard disk, and multiplexes the stream output from the PID controller, and outputs and skips the stream currently decoded by decoding the multiplexed stream output from the stream controller. If set, the apparatus for skip stream reproduction of a digital broadcast receiver, characterized in that it comprises an MPEG decoder for converting the stream for skipping into a stream to be currently reproduced. A first step of simultaneously reading two streams each having a different storage time from a storage medium into a stream to be currently reproduced and a stream for skipping; and a stream to be decoded simultaneously by decoding each of the above-mentioned streams. A second step of outputting the signal to the outside; a third step of determining whether a skip operation is set; and a fourth step of selecting and outputting the decoded skip stream as a stream to be currently reproduced when it is determined that the skip operation is set. A skip stream reproduction method of a digital broadcast receiver, characterized in that consisting of. A first step of simultaneously reading two streams having different storage points from a storage medium as streams currently being played and streams for skipping; A second step of changing a packet identifier (PID) for one of the streams; a third step of multiplexing and decoding two streams having different identifiers; and a currently reproduced scrim A fourth step of determining whether the skip operation is set while outputting to the outside, and a fifth step of selecting the skip stream decoded as the stream to be currently reproduced when the skip operation setting is confirmed and outputting it to the outside. A skip stream reproduction method of a digital broadcast receiver. The method of claim 3 or 4, wherein when a skip operation is set so that a stream for skip is output as a stream to be currently reproduced, a stream for which a storage time differs from the currently reproduced stream by a predetermined time is converted into a stream for skipping. And selecting and decoding the skip stream.

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