KR20080073552A - Data streaming method and apparatus - Google Patents

Abstract

The present invention relates to a data reproduction method and apparatus. The data reproducing apparatus according to the present invention includes a connection unit 210 to which a storage device is connected, and a device determination unit that receives the unique information of the connected storage device from the connection unit and determines whether the storage device has been previously reproduced by comparing with the previously stored information. And a control unit 240 for controlling the playback data to be played back from the point where playback was stopped, in the case of the storage device that was previously reproduced. According to the present invention, when the user reproduces again in an emergency situation such as power supply of the USB device, the playback device automatically provides a convenience to the user by playing from the previous playback point without any separate operation of the user.

Description

Data playback method and apparatus

1 is a block diagram of a data reproducing apparatus according to a preferred embodiment of the present invention.

2 is a flowchart of a data reproducing method according to a preferred embodiment of the present invention.

3 is a detailed flowchart of a determination method of the USB device of FIG.

4 is an operation flowchart according to a change of state of a USB device during reproduction according to the present invention;

Explanation of symbols on the main parts of the drawings

100: USB device 200: USB playback device

205: first storage unit 210: connection unit

220: device determination unit 230: detection unit

240: control unit 250: second storage unit

260 MP3 / WMA decoder 270 digital / analog converter

280: audio output unit 290: display unit

The present invention relates to a data reproducing apparatus, and more particularly, to a data reproducing apparatus and a control method for reproducing data from a time point at which reproduction is stopped based on unique information of a connected device.

Currently, external storage media for storing video and audio data are widely used. As an external storage medium, there are many devices using a universal serial bus ("USB"). Such USB devices are widely used because they can be easily used using a USB interface method, and have been applied to various devices (eg, PCs, PMPs, cell phone, digital cameras).

USB devices to which the USB method is applied are generally used as a storage medium for storing audio and video data. Therefore, in order to play the stored data, it had to be connected to a playback device such as a PC. That is, when not connected to the playback device, a simple storage medium function is provided, and data is played back according to a predetermined operation only when connected to the playback device.

However, the prior art as described above has the following problems.

That is, when playback is interrupted due to an emergency situation such as power interruption or switching of functions while playing a USB device connected to the playback device, the playback point of the playback device is It is initialized and played from the initial position. It does not matter if the user wants to play from the beginning, but most users want to play continuously from the previous playback stop point. Therefore, when the user wants to play from the previous playback point at which playback is stopped, there is a troublesome problem of searching for and playing back the playback point of data.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a data reproducing apparatus and a control method for automatically reproducing from a point at which the previous reproduction is interrupted according to unique information of a USB peripheral device. To provide.

According to a feature of the present invention for achieving the above object, the data reproducing apparatus of the present invention includes a connection portion to which the storage device is connected; A device determination unit which receives the unique information of the connected storage device from the connection unit, and determines whether the previously stored storage device is compared with the unique information of the previously stored device; And a control unit for controlling playback data to be played back from the time point at which the previous playback was stopped, in the case of the storage device that was previously played back as a result of the determination of the device determining unit.

And it further comprises a detector for detecting a change in the function mode of the storage device.

The apparatus may further include a first storage unit configured to store the unique information of the storage device connected to the data reproducing apparatus and the last reproducing information of the storage device.

Meanwhile, a second storage unit is provided to convert the playback data of the storage device connected to the data reproducing apparatus into an audio signal, wherein the second storage unit uses SDRAM.

At this time, the unique information includes at least one of product ID, producer ID, total folder information, total file information, file detail block information of the storage device.

If the unique information of the device transmitted from the connected storage device and the unique information of the stored device coincide, the device determining unit recognizes the previously stored storage device in the data reproducing apparatus.

On the other hand, if at least one of the unique information of the device stored in the first storage unit and the unique information of the device received from the connected storage device is inconsistent, it is recognized as an input of a new storage device.

On the other hand, the control unit determines the playback stop time by determining the playback time, playback position, playback status, output status of the playback data.

The sensor detects whether the function mode state, the power state, the ACC state of the storage device is switched, and whether the storage device is removed from the data reproducing apparatus.

In addition, when receiving the input signal of the new storage device as a result of the determination of the device determination unit, the control unit stores the unique information of the storage device, and controls to play from the first position.

The controller may be configured to switch the functional state of the storage device input as a result of the sensing unit, to turn off the ACC state for temporarily storing the power state and playback progress information, or to remove the storage device from the data playback device. The last playback state of the storage device is stored along with the unique information of the storage device.

According to a feature of the present invention for achieving the above object, the data reproduction method of the present invention comprises the steps of: (A) detecting the connection of the storage device is stopped playback; (B) transmitting the unique information of the storage device; (C) comparing the transmitted unique information with unique information of a previously stored storage device, and determining whether the previously stored storage device is connected; (D) in the case of the previously connected storage device, reproducing data continuously from the point of time at which the reproduction is stopped.

In this case, the step (C) compares the product ID, the producer ID, the sound source folder information, the sound source file information, and the file detail information, which are the unique information of the storage device, with the previously stored information. Recognize it as a device.

On the other hand, product ID, producer ID, sound source folder information, sound source file information, and file detail information, which are unique information of the storage device, are compared with previously stored information.

In the case of a new storage device, the method may further include storing unique information of the connected storage device and reproducing the first location.

At this time, the playback stop time is determined by determining the playback time, playback position, playback status, and output status of the playback data.

And (a) accessing and reproducing data of a storage device connected to the data reproducing apparatus; (b) detecting a function change or a state change of the connected storage device during the playback; (c) when the function change or the state change occurs as a result of the detection, storing the playback time of the data currently being played, and setting to continuously play the data when the data of the storage device is accessed again.

When storing the reproduction time of the data being reproduced, the unique information of the input storage device and its corresponding last reproduction information are stored in a table.

In addition, when the function mode state, the power state of the storage device, the ACC state temporarily storing the current reproduction progress information is switched or the storage device is removed from the data reproducing apparatus, the change is detected.

According to the present invention having the above-described configuration, it is possible to check whether the USB device that has been previously played by referring to the unique information of the USB device connected to the data reproducing apparatus, and continuously from the time when the playback was interrupted by external factors. It can be seen that it can be played back.

Hereinafter, a data reproducing apparatus and a control method for automatically operating and providing a playback time point for each USB peripheral device according to the present invention as described above will be described in detail with reference to the preferred embodiment shown in the drawings.

1 is a configuration diagram of a data reproducing apparatus according to a preferred embodiment of the present invention, FIG. 2 is a flowchart of a data reproducing method according to a preferred embodiment of the present invention, and FIG. 3 is a flowchart of a determination method of the USB device of FIG. 4 is an operation flowchart according to the state change of the USB device during reproduction according to the present invention.

First, the present invention includes a storage device having a data storage function (hereinafter referred to as "USB device") and a data playback device (hereinafter referred to as "USB playback device") to which the USB device is connected and accesses stored data.

The USB method adopted as the connection method in the present invention can be easily used and the current general devices are all equipped with a USB port, so in this embodiment, it is easy to use a structure for interconnecting the USB ports. This is described as a device / device having a USB port.

First, a USB device as a storage medium and a USB playback device connected thereto will be described in detail with reference to the drawing shown in FIG. 1.

First, the USB device 100 has device specific information. The unique information may include a product ID, a vendor ID, other information on the total folders formed (e.g., the total number of folders in the usb device), and the total file information (e.g., the total number of files in the usb device). It contains a file discription block. The product ID and the producer ID are immutable information, and the remaining information, folder / file / block information, is variable information according to the use of the USB device 100. At least one USB device 100 may be provided, and thus, each USB device may have different unique information.

Next, the USB playback device 200 of the present invention is provided with a connection unit 210 for connecting the external USB device 100.

When the USB device 100 is connected to the connection unit 210 from the outside, the unique information of the USB device is transmitted according to a predetermined protocol, and then transferred by referring to the unique information of the device stored in the first storage unit 205 described later. The device determination unit 220 for determining whether to play the USB device is connected to the.

 The device determination unit 220 is a unique information of the device previously stored in the first storage unit 205, that is, product ID, producer ID, all folder information, all file information, file detail block information and the connected USB device 100 Comparing and judging the information obtained from the case is determined that the USB device 100 previously connected and reproduced.

On the other hand, if at least one of the information obtained from the USB device 100 and the unique information of the device stored in the first storage unit 205 is inconsistent, it is determined that the input is a new USB device.

The device determination unit 220 is preferably implemented as a USB OTG to operate the connected USB device 100 as a slave (slave), and to operate the USB playback device 200 as a host. The USB OTG is an abbreviation of USB On-The-Go, and refers to a USB module having a function of directly connecting with a digital device without a PC and exchanging data. Is going to widen. In the present embodiment, the data is supplied from an external USB device through the above-described USB module as an example.

In addition, the USB playback apparatus 200 suspends the power supply of the ACC temporarily storing state changes (eg, function switching, power supply suspension, and playback progress information) of the USB device 100 connected to the connection unit 210. And a detection unit 230 for detecting a state in which the connected USB device 100 is removed from the connection unit. The detection result of the detection unit 230 is transmitted to the control unit 240 to be described later, the control unit 240 stores the unique information of the connected USB device and the last playback information of the USB device according to the detection result, It controls the overall operation of the USB playback device 200 of the present invention.

When the USB device 100 is connected to the connection unit 210, the USB device 100 controls the data stored in the USB device 100 to be reproduced. Also, the device determining unit 220 determines that the USB device was previously played in the USB playback device. When receiving the result, the control unit 240 is provided to manipulate the playback time in response to the pre-stored playback information so that the playback data is reproduced again from the time when the USB device is stopped playback.

When the connected USB device recognizes that the connected USB device is a new USB device according to the determination result of the device determination unit 220, the controller 240 stores the unique information of the USB device and initializes the playback information to initialize the playback data. Play from position.

On the other hand, when the control unit 240 receives a state change detection signal, such as power power failure, function switching, removal of the device, etc. of the USB device 100 connected to the connection unit 210 from the detection unit 230, the control unit 240 back-ups unique information of the connected USB device and last playback information of the USB device. The controller 240 may be a microprocessor or a digital signal processor (DSP).

In addition, a first storage unit 205 for storing the information and the like by the control unit 240 is provided. That is, the first storage unit 205 includes unique information about the USB device 100 that has been played by the at least one USB player 200 (eg, a product ID and a producer which are unique information of the device). Along with the vender id, variable information such as full folder information, full file information, and file discription block information is stored according to the use of the USB device. On the other hand, the first storage unit 205 preferably stores the USB unique information and its last playback information in a table. This is to automatically operate the playback start point according to the unique information of the input USB device when the USB playback device 200 detects an input of the USB device 100.

In the embodiment of the present invention, the product ID, the producer ID, the entire folder information, the entire file information, and the file detail block information have been described as an example of storing the first storage unit 205. It is also possible to store unique information that can be read by the device and other storage information that can represent the storage state of the device.

On the other hand, as the playback information required for playing from the point where the USB playback device 200 was previously interrupted, it is preferable to store the playback time, the playback position, the playback status, and the output status. The first storage unit 205 may be provided with various storage media such as an EPROM and a flash memory according to the capacity of data to be stored.

The USB player 200 further includes an MP3 / WMA decoder 260 for converting a sound source file such as MP3 / WMA received through the USB OTG into a digital audio signal. .

The MP3 / WMA decoder 260 includes a digital / analog converter 270 for converting a digital audio signal received from the MP3 / WMA decoder 260 into an analog audio signal, and the digital / analog converter 270. Audio output unit 280 for outputting the analog audio signal generated from the sequential connection.

In this case, the MP3 / WMA decoder 260 is preferably connected to a buffer memory which is a second storage unit 250 used to convert the MP3 file or WMA file into an audio signal. SDRAM is used as the buffer memory.

In addition, the USB playback apparatus 200 further includes a display unit 290 for displaying the current playback status and the unique information and playback status of the device of the connected USB device 100. The display unit 290 generally uses a liquid crystal display (LCD).

In addition, in the present invention, the control unit 240 and the device determination unit 220 are interfaced by a UART (universal asynchronous receiver / transmitter) method, and the control unit 240 and the MP3 / WMA decoder 260 and the buffer memory are The SIO interface is used, and the MP3 / WMA decoder 260 and the digital / analog converter 270 are interfaced by the IIS method.

In the preferred embodiment of the present invention, a sound source file is described as an example, but a file such as an image file is also applicable.

Hereinafter, a control method of a data reproducing apparatus for automatically reproducing by checking the reproducing time point according to the USB peripheral device according to the present invention will be described in detail.

2 is a flowchart of a data reproducing method according to a preferred embodiment of the present invention.

The following embodiment starts from a state in which the USB device 100, which was connected to the USB player 200 and operated, is disconnected due to an emergency such as power supply.

The controller 240 waits until there is a connection of the USB device 100. When the USB device 100 is connected through the connection unit 210, the device determination unit 220 receives the device specific information from the USB device 100 (S10). Here, the device specific information includes a product ID, a producer ID, total folder information (for example, the total number of folders in the USB device), total file information (for example, the total number of files in the USB device), File discription block information and the like.

Subsequently, the device determining unit 220 compares the unique information of the device obtained from the connected USB device 100 with the unique information of the device stored in the first storage unit 205 to play back the previously connected USB device 100. It is determined whether the USB device has been applied (S20).

The determination method of the USB device 100 will be described in detail with reference to FIG. 3.

That is, the device determination unit 220 determines whether the device ID received from the connected USB device 100 is stored in the storage unit, and if so, determines whether the received device ID and the stored device ID match (see FIG. S31).

In this case, if it is determined that there is matching information by the device determining unit 220, the device determining unit 220 determines whether the input producer ID and the stored production ID is the same (S32). On the other hand, if the input device ID and the stored device ID does not match in step S31, if the information on the input device ID is not stored, it is determined as the input of the new USB device (S50).

In this case, the comparison between the device ID and the producer ID is performed first because the device ID and the producer ID information are unique information for determining the input device.

Thereafter, the device determination unit 220 determines whether the inputted whole folder information and the stored whole folder information match (S33). The entire folder information is variable according to the use of the device, but considering that the USB device is a storage device even if the unique information of the device is identical, when the variable information is changed, the new USB device 100 Judging that it is entered.

On the other hand, if it is determined in step S33 that the entire folder information inputted and the stored entire folder information match, it is determined whether or not the inputted full file information and the stored full file information match (S34). When the two pieces of information do not match as described above, the device determination unit 220 determines that a new USB device 100 has been input.

On the other hand, if it is determined that the two pieces of information match the determination result of S34, the device determining unit 220 determines whether the file detail block information stored in the input file detail block information matches (S35).

When the two pieces of information coincide with each other as a result of the determination in step S35, the device determination unit 220 determines that the USB device 100 has been previously played (S36), and transmits the determination result to the controller 240.

On the other hand, if the two pieces of information do not match as a result of the determination in step S35, it recognizes as a new USB device (100) (S50), and transmits the determination result to the control unit 240.

In the preferred embodiment of the present invention, in order to determine whether the input USB device is a USB device operated in the previous USB playback device 200 by comparing the unique information in order to determine as an embodiment, but the USB device described It is apparent that the criteria and judgment order of the present invention can be determined by checking the unique information and the storage information of the device operating in the previous USB reproducing apparatus 200.

A method of determining a connected USB device has been described in detail with reference to FIG. 3. Hereinafter, returning to the preferred embodiment of the present invention of FIG. 2 will be described in detail the operating method of the connected USB device according to the determination result.

When the control unit 240 receives the determination result that the USB device was previously reproduced from the device determination unit 220, the control unit 240 accesses the playback information corresponding to the unique information of the device (S40), The playback data is controlled to be played back from the point where the previous playback is stopped (S80).

On the other hand, when the control unit 240 receives the determination result that the input of the new USB device 100 from the device determination unit 220, the control unit 240 recognizes the input of the new USB device ( S50), the unique information of the USB device is stored (S60), the playback information is initialized (S70), and thus the playback point is manipulated to the initial position for playback (S90).

4 is a flowchart illustrating the operation according to the state change of the USB device during playback according to the present invention.

The following embodiment starts from the state in which the USB device 100 is being reproduced in the USB playback apparatus 200 according to a preferred embodiment (S80).

When the control unit 240 detects a function switching signal of the connected USB device 100 from the detection unit 230, the control unit 240 is information of the USB device 100 together with the unique information of the connected USB device. The current playback information corresponding to the backup is backed up (S81, S86).

On the other hand, when a function is not made and the power of the connected USB device 100 is cut off while the playback is in progress, the controller 240 receiving the detection signal from the detection unit 230 is connected to the connected USB. The current playback information corresponding to the information of the USB device 100 together with the unique information of the device is backed up and stored (S82 and S86).

In addition, when the power of the ACC temporarily storing the current playback progress information is cut off while the playback is in progress without a situation such as a function change and a power cutoff, the detection unit 230 detects the detection. The controller 240 receiving the signal backs up and stores the current playback information corresponding to the information of the USB device 100 together with the unique information of the connected USB device (S83, S86).

When the USB device 100 connected to the USB player 200 is removed from the detection unit 230, the control unit 240 receiving the detection signal is connected to the USB device 100 together with the unique information of the connected USB device. The current playback information corresponding to the information in ") is backed up and stored (S84, S86).

At this time, it is preferable that the reproduction information stores reproduction information such as a point at a reproduction time being reproduced, a reproduction state, an output state, and the like. Preferably, the playback information is stored by reproducing the playback information for each connected USB device, and this means that if the control unit 240 previously played the USB device according to the unique information of the input USB device, the playback time point corresponding thereto is stored. This is for playback by operation.

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self-evident.

In the USB playback apparatus according to the present invention as described in detail above, the following effects can be expected.

In other words, if the playback point is interrupted due to a situation such as switching power supply or function of the USB device, the playback point is controlled by automatically adjusting the starting point to be played according to the unique information of the USB peripheral device. There is an advantage in that the playback apparatus automatically provides the user with convenience by playing from the previous playback time without any separate operation of the user.

Claims (20)

A connection part to which the storage device is connected; A device determination unit which receives the unique information of the connected storage device from the connection unit, and determines whether the previously stored storage device is compared with the unique information of the previously stored device; And And a controller for controlling the playback data to be played back from the point at which the previous playback was stopped, in the case of the storage device previously played back as a result of the determination of the device determining unit. The method of claim 1, And a sensing unit for detecting a change in a function mode of the storage device. The method according to claim 1 or 2, And a first storage unit for storing the unique information of the storage device connected to the data reproducing apparatus and the last reproducing information of the storage device. The method of claim 3, wherein And a second storage unit provided to convert the reproduction data of the storage device connected to the data reproduction device into an audio signal. The method of claim 4, wherein And the second storage unit is an SDRAM. The method of claim 3, wherein The unique information is, And at least one of product ID, producer ID, total folder information, total file information, and file detail block information of the storage device. The method of claim 6, The device determination unit, And when the unique information of the device received from the connected storage device and the unique information of the device stored in the first storage unit coincide, the data reproducing apparatus recognizes the previously reproduced storage device. The method of claim 7, wherein The device determination unit, And at least one of the unique information of the device received from the connected storage device and the stored device unique information is recognized as an input of a new storage device. The method of claim 1, The control unit, And a time point at which playback is stopped by judging the play time, play position, play state, and output state of the play data. The method of claim 2, The detection unit, And detecting whether a function mode state of the storage device, a power state, an ACC state for temporarily storing current playback progress information is switched, and whether the storage device is removed from the data playback device. The method according to claim 1 and 2, The control unit, And receiving the input signal of the new storage device as a result of the determination by the device determination unit, and storing the unique information of the storage device, and controlling to reproduce from the first position. The method of claim 10, The control unit, When the functional state of the storage device input as a result of the sensing unit is switched, the power state, the ACC state is turned off, or the storage device is removed from the data reproducing device, the last playback of the storage device together with the unique information of the storage device is performed. And a data reproducing apparatus. (A) detecting the connection of the storage device which has been stopped playing; (B) transmitting the unique information of the storage device; (C) comparing the transmitted unique information with unique information of a previously stored storage device, and determining whether the previously stored storage device is connected; And (D) a data reproducing method comprising the step of continuously reproducing the data from the time when the reproducing is stopped in the case of the previously connected storage device. The method of claim 13, Step (C) is, The product ID, the producer ID, the sound source folder information, the sound source file information, and the file detail information, which are unique information of the storage device, are compared with the previously stored information. How to play data. The method of claim 14, The product ID, producer ID, sound source folder information, sound source file information, and file detailed information, which are unique information of the storage device, are compared with previously stored information, and if at least one of the comparison results is inconsistent, the data is characterized as a new storage device. How to play. The method of claim 15, In the case of a new storage device, the method further comprises the step of storing the unique information of the connected storage device and playing from the first position. The method of claim 13, The playback stop time is, A data reproducing method, characterized by determining the reproducing time, reproducing position, reproducing state, and output state of reproducing data. (a) accessing and reproducing data of a storage device connected to the data reproducing apparatus; (b) detecting a function change or a state change of a connected storage device during the playback; And (c) when the function change or the state change occurs as a result of the detection, storing the playback time of the currently playing data, and setting to continuously play the data when the data of the storage device is accessed again. The data reproduction method. The method of claim 18, When storing the playback time of the data being reproduced, And storing the inputted unique information of the storage device and corresponding last playback information in a table. The method of claim 18, Detecting a change when a function mode state, a power state of the storage device, an ACC state temporarily storing current reproduction progress information, or when the storage device is removed from a data reproducing apparatus; .

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