KR20010057911A - Broadcasting signal recording and playing apparatus using hard disk - Google Patents

Abstract

PURPOSE: A device for recording/reproducing a broadcasting signal using a hard disk is provided to restore and reproduce large quantity data by mounting a hard disk in a receiver for receiving a digital broadcasting as an exterior type. CONSTITUTION: A tuner(20) tunes a broadcasting signal selected by a user. An analogue/digital converter(21) converts the tuned broadcasting signal into a digital. A recording/reproducing control unit(22) stores the digital broadcasting signal outputted from the analogue/digital converter(21) in a hard disk or reproduces the broadcasting signal stored in the hard disk. An MPEG2(moving picture experts group2) decoder(23) performs a decoding process of a broadcasting signal outputted from the recording/reproducing control unit(22) and a broadcasting signal outputted from the analogue/digital converter(21). A format and digital/analogue converter(24) converts the decoded broadcasting signal into a format for displaying and into an analogue. A CPU(25) controls each block in accordance with a signal inputted by a user.

Description

Broadcasting signal recording and playing apparatus using hard disk}

The present invention relates to a broadcast signal recording and reproducing apparatus, and more particularly, to a broadcast signal recording / reproducing apparatus using a hard disc mounted or mounted externally in a receiver for receiving digital broadcasts to record or play digital broadcasts. will be.

1 is a block diagram showing the configuration of a conventional broadcast signal reproducing and recording apparatus.

A digital television signal received through a conventional digital television or tuner 10 of a digital settop box is converted into an 8-bit TS (Transport Stream) via an A / D converter 11 including a channel IC. do. The TS data is reproduced through a format conversion and D / A conversion unit 13 for converting the data compressed through the MPEG2 decoder 12 into original video / audio data for display.

During broadcast recording, a recording device 14 such as a DVCR or DVD was connected to a digital television to record a desired program or to record a desired program while watching another program, and then play and watch.

As such, conventionally, a device capable of directly recording a broadcast signal in a television has not been commercialized, and there are inconveniences in that it is inconvenient due to the problem of having to purchase a separate recording device to record a desired broadcast and the limitation of the amount of broadcast recording.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a broadcast signal recording / reproducing apparatus using a hard disk capable of storing and playing back a large amount of data by mounting a hard disk externally in a receiver for receiving digital broadcast.

1 is a block diagram showing the configuration of a conventional broadcast signal reproducing and recording apparatus.

2 is a block diagram showing the configuration of a broadcast signal recording / playback apparatus using a hard disk according to the present invention.

3 is a detailed view of FIG. 2.

4 is an operation timing diagram of the PIO controller of the apparatus illustrated in FIG. 3.

FIG. 5 is an operation timing diagram of the DMA controller of the apparatus illustrated in FIG. 3.

In accordance with another aspect of the present invention, there is provided a broadcast signal recording / reproducing apparatus using a hard disk, comprising: a first storage unit for storing a selected broadcast signal in units of a predetermined amount; A recording medium storing or outputting a broadcast signal stored in the first storage unit by a control signal; A second storage unit which stores the broadcast signal output from the recording medium in a predetermined amount unit; A signal processor for performing signal processing for displaying the broadcast signal output from the second storage unit and the selected broadcast signal; And a controller for controlling input and output of a broadcast signal to the recording medium in response to a storage capacity of the first storage unit or the second storage unit at the time of recording or reproducing a broadcast signal.

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

2 is a block diagram showing the configuration of a broadcast signal recording / playback apparatus using a hard disk according to the present invention.

The apparatus shown in FIG. 2 includes a tuner 20 for tuning a broadcast signal selected by a user, an A / D converter 21 for digitally converting the tuned broadcast signal, and an A / D. The recording / playback control unit 22 for storing the digital broadcast signal output from the converter 21 on the hard disk or reproducing the broadcast signal stored on the hard disk, and the broadcast signal and A / D output from the recording / playback control unit 22. Moving Picture Experts Group 2 (MPEG2) decoder 23 which performs decoding processing on the broadcast signal output from the converter 21, a format for converting the decoded broadcast signal into a format for displaying and converting it into an analog; The D / A converter 24 and the CPU 25 control each block according to the signal input by the user.

In the present invention, the recording / playback control unit 22 includes a first in first out (FIFO) 22-1 buffering a broadcast signal to be recorded, and a second FIFO 22-2 buffering a broadcast signal to be played back. , The hard disk 22-3, the controller 22-4 for controlling the recording and playback of the broadcast signal to the hard disk 22-3 at the time of recording or playback, and the first FIFO 22-1 at the time of recording or playback. Or a switching unit 22-5 for switching the output of the second FIFO 22-2.

3 is a detailed view of FIG. 2.

The apparatus shown in Fig. 3 outputs data to be recorded by comparing the PID detection unit 30 for detecting PID (Packet Identifier) from the 8-bit TS data input at the time of recording, and the TS data input corresponding to the detected PID. When a predetermined amount of buffering is completed in the first FIFO 32 and the first FIFO 32 that buffer the recording data output from the first data comparator 31 and the first data comparator 31, A first data generator 33 to generate, a hard disk 34 for storing broadcast signals to be recorded and reproduced, a CPU 35 for controlling each block according to a recording / playback signal input by a user, and a hard disk 34 Program input output (PIO) control unit 36 for outputting data and instructions for initializing the control unit 36, and direct memory access (DMA) for controlling the storage and output of broadcast signals to the hard disk 34 without being controlled by the CPU 35. Control unit 37, PIO control unit 36 and DMA control The multiplexer 38 for switching the read / write signal output from the 37 and the output signal of the first data generator 33 and the output signal of the PIO controller 36 for data input / output to the hard disk 34 are provided. The bus controller 39 for switching, the second data generator 40 for generating data of a format to be reproduced with respect to the broadcast signal output from the hard disk 34 at the time of reproduction, and the second data generator 40 are outputted. And a second data comparator 42 which outputs data to be reproduced corresponding to the PID from the output signal of the second FIFO 41 and the second FIFO 41 which buffers data of the reproduction format.

4 is an operation timing diagram of the PIO controller of the apparatus illustrated in FIG. 3.

FIG. 5 is an operation timing diagram of the DMA controller of the apparatus illustrated in FIG. 3.

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

In FIG. 2, the tuner 20 tunes a broadcast signal selected by a user under the control of the CPU 25, and the A / D converter 21 converts the tuned broadcast signal into a digital signal.

The 8-bit TS data, which is a digitally converted broadcast signal output from the A / D converter 21, is input to the recording / playback control unit 22 to perform a process for recording and playback. A / D-converted TS data at the time of recording is converted into 16-bit data under the control of the control unit 22-4 when a certain amount is buffered in the first FIFO 22-1, and is recorded on the hard disk 22-3. . At the time of reproduction, 16-bit data stored in the hard disk 22-3 is converted into 8-bit data under the control of the control unit 22-4, and buffered and output to the second FIFO 22-2. The first and second FIFOs 22-1 and 22-2 may simultaneously perform a playback operation during recording by using a difference in data rates, and simultaneously perform a recording operation during playback.

The switching unit 22-5 switches the A / D conversion unit during recording, and switches the second FIFO 22-2 during reproduction. The switched data is decoded under the control of the CPU 25 in the MPEG2 decoder 23, and the format and D / A converter 24 converts the decoded data into a format for displaying and converts the data into analog data. Output to a display unit (not shown).

Referring to Figure 3 describes the recording / playback process in detail as follows.

The recording or reproducing signal operated by the user is input to the CPU 35, and the CPU 35 determines the recording and reproducing mode according to the user operation signal. Each mode consists of 8 bits, and in the case of 00000001, the tuned TS data is selected, and in the case of 00000010, the tuned TS data is selected, and the data recorded on the hard disk 34 is selected.

When the recording mode is selected by the CPU 35, the PID detection unit 30 detects the PID value following 0x47 of 8-bit data input when the valid signal has a value of 1. This PID value represents a label for a video signal or an audio signal and indicates what data is being input.

The first data comparator 31 compares the input TS data corresponding to the PID detection value and outputs data to be recorded. That is, the PID value for the current broadcast selected by the CPU 35 is compared, and if the PID values for the input data are the same, the input data is stored in the first FIFO 32.

The first FIFO 32 has a 256-byte size to perform a read / write operation in units of 128 bytes. That is, when the data stored in the first FIFO 32 reaches 128 bytes, the CPU 35 is notified of this and the CPU 35 outputs a DMA write command to the hard disk 34 through the PIO control unit 36.

The hard disk 34 receives a DMA write command transmitted through the PIO control unit 36 to output a DMARQ signal, and the DMA control unit 37 receives this signal and outputs 8-bit data from the first FIFO 32. The first data generating section 33 is a transmission rate converting means for converting the storage transmission rate (2.7 MHz) of the first FIFO 32 into a transmission rate (16 MHz) that can be recorded on the hard disk 34. In other words, the first data generator 33 generates and outputs 16-bit data that allows 8-bit data output from the first FIFO 32 to be recorded on the hard disk 34.

At this time, the data transmitted from the PIO control unit 36 and the TS data are selected by the bus control unit 39. That is, when the DMARQ signal is 1 or the DMACK signal is 0, the TS data is selected because the DMA mode is used. Otherwise, the CPU 35 data output from the PIO control unit 36 is selected and transferred to the hard disk 34. After the DMA transfer is completed, the hard disk 34 transmits an IRQ signal to the CPU 35, and the CPU 35 reads the status register (not shown) of the hard disk 34 to check whether there is an error. Perform.

4 shows an operation timing diagram of the PIO controller 36 for initializing the hard disk 34 and for the DMA command. The EPLD clock is a system clock of the DMA control unit 37. The EPLD clock receives the HDD_CS and the address, which are signals for interfacing the hard disk 34 from the main board (not shown) of the digital television set or the set-top box, and receives the hard disk from the PIO control unit 36. It produces the signals needed for the disk 34 interface. CS1FX and CS3FX are determined by the most significant bit of the address. If this bit is 0, CS1FX has a value of 0 during a period where HDD_CS is 0. If this bit is 1, CS3FX has a value of 0 during a period where HDD_CS is 0. The remaining three bits are also given as an address for the hard disk 34. The DIOW / DIOR for PIO data transmission is generated by E_WE / E_OE, which is a data input / output enable signal of the CPU 35, and input to the hard disk 34 together with 16-bit data.

5 shows an operation timing diagram of the DMA controller 37 for DMA data transfer of TS data. The DMARQ output from the hard disk 34 and the response DMACK are synchronized with an EPLD clock of 16 MHz. Also, a DIOW / DIOR for an 8 MHz 16-bit DMA is generated by the 16 MHz EPLD clock. DMA is performed for 128K bytes (approximately 8 ms), with DMARQ 1 and DMACK 0.

When the playback mode (00000010) is selected by the CPU 35, the CPU 35 sends a DMA read command to the hard disk 34 through the PIO control section 36, and the hard disk 34 outputs a DMARQ signal. Let's do it. In this case, when the DMA control unit 37 sets the DMACK signal to 0 and sends the DIOR signal to the hard disk 34, the hard disk 34 outputs 16-bit data in synchronization with this signal.

The 16-bit data is converted into 8 bits by the second data generator 40 and stored in the second FIFO 41 by 128K bytes. When 128K bytes are stored in the second FIFO 41, the CPU 35 is notified of this, and the data is reproduced in the second data comparator 42 in synchronization with a TS data clock of 2.7 MHz and then decoded and stored in a digital television broadcast. do.

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, data compressed by MPEG2 can be stored on a hard disk to record and reproduce a large amount of broadcast signals, and hardware complexity can be reduced by transmitting data by DMA and PIO control logic. It works.

Claims (5)

In the broadcast signal receiving apparatus, A first storage unit which stores the selected broadcast signal in units of a predetermined amount; A recording medium storing or outputting a broadcast signal stored in the first storage unit by a control signal; A second storage unit which stores the broadcast signal output from the recording medium in a predetermined amount unit; A signal processor configured to perform signal processing for displaying the broadcast signal output from the second storage unit and the selected broadcast signal; And And a control unit which controls input / output of a broadcast signal to the recording medium in response to a storage capacity of the first storage unit or the second storage unit during broadcast signal recording or reproduction. The device of claim 1, wherein the device is And a switching unit for switching the selected broadcast signal during recording and an output signal of the second storage unit during playback. The device of claim 1, wherein the device is Broadcast signal recording / reproducing apparatus characterized in that it can perform the playback operation during the recording operation at the same time or the recording operation during the playback operation at the same time. The method of claim 1, And a transmission rate converting means for changing the storage transmission rate and the reproduction transmission rate of the first and second storage units. The device of claim 1, wherein the device is And recognizing a packet identifier with respect to the broadcast signal selected at the time of recording the broadcast signal, selecting only the broadcast signal having the same packet identifier, and storing the selected broadcast signal in the first storage unit.