TWI478553B - Media data playback device - Google Patents

Description

Media data player

The invention relates to computer technology, in particular to a media data playing device and a replaying method thereof.

A television receiving device, generally referred to as a set-top box, is used to manage a channel number that is not supported by the television, and descramble, decrypt, decode, and decode the channel signal. Video and related information, such as a program guide. Digital TV set-top boxes are equipped with hard disks for storing TV programs for later replay. This feature is really helpful when you need to replay clips in your movie. However, if the replayed movie is long, it is difficult to find the desired clip.

An object of the present invention is to provide an embodiment of a media material playing device, comprising a receiver, a buffer register, a capture unit, a parser unit, a decoder unit and a combiner. The receiver receives the media stream. The buffer register includes first, second, and third buffer registers. The capturing unit copies and stores the first segment of the media data stream as a first copy and a second copy in the first and second buffer registers, and generates and stores a third copy of the second copy. And a third buffer register in response to the replay instruction, wherein the second segment of the media data stream replaces the first and second replicas of the first and second buffer registers. The parser unit includes first and second parsers respectively parsing the second segment of the first buffer register and the third replica of the third buffer register in a parallel processing manner. The decoder unit includes the first and second decoders respectively decoding the parsed second segment and the parsed third replica in a parallel processing manner. The combiner combines the video signals from the decoded third copy and the second segment.

In addition, the present invention provides an implementation manner of a media data replay method, which is implemented in a media resource including first, second, and third buffer registers. Material playback device. The media data playing device includes first, second and third buffer registers and is electrically connected to a display. The media data replay method includes: receiving a media data stream; copying and separately storing the first segment of the media data stream in the first and second buffer registers to become a first copy and a second copy; generating and storing the foregoing The third replica of the second replica is in response to the replay command in the third buffer register, wherein the second segment of the media data stream replaces the first and second replicas in the first and second buffer registers; And using the first and second parsers of the media data playing device to parse the second segment of the first buffer register and the third replica of the third buffer register in a parallel processing manner; The first and second decoders of the data playback device respectively decode the parsed second segment and the parsed third replica in a parallel processing manner; and combine the decoded third replica and the second segment combined video The signal is displayed on the above display.

The media material playing device and its replay method implementation method are as follows:

1. System Overview

The media data playing device disclosed in the present invention can be implemented as a single device or integrated into various media data playing devices, such as a set top box, a mobile phone, a tablet personal computer, and a laptop (laptop). Computer), multimedia player, digital camera, personal digital assistant (PDA), navigation device or mobile internet device (MID).

1.1 Embodiment of media material playing device

Referring to FIG. 1, the processor 151 is a central processing unit of the media data playing device 100, and may be composed of an integrated circuit (IC) for processing data and executing a computer program. The component connection mode of the media material playback device 100 is as shown in FIG. 1, and may be constituted by a serial or parallel bus bar or a wireless communication channel. The wireless communication unit 156 establishes a communication channel, so that The media material playing device 100 is connected to the remote server through the communication channel, and the media data is sent from the remote server. In addition, the wireless communication unit 156 can establish a wireless communication channel, so that a mobile device, such as a remote controller, can connect to the media material playback device 100 and exchange data through the wireless communication channel. The communication unit 156 may include an antenna, a base band, and a radio frequency (RF) chip set for performing wireless local area network (wireless LAN) communication, infrared communication, and/or a honeycomb. Communication system communication, such as Wideband Code Division Multiple Access (W-CDMA) and High Speed Downlink Packet Access (HSDPA). Through the wireless communication channel established above, the media data playing device 100 can serve as an access point of the wireless local area network, so that the mobile device can connect to the Internet via the access point.

The processor 151 may be composed of a single package IC or a plurality of package ICs with the same function or different functions. For example, the processor 151 may only include a central processing unit (CPU), or a CPU, a digital signal processor (DSP), and a communication controller (eg, the communication unit 156). Combination of wafers. The above-described communication controller may comprise cellular communication system communication, infrared, Bluetooth (Bluetooth ^TM) or wireless LAN communication control apparatus. The CPU can be a single computing core or a CPU with multiple computing cores. The communication controller is configured to control communication of components in the media material playback device 100, or communication between the media material playback device 100 and an external device, and can support direct memory access.

The power supply 158 supplies power to each component in the media material playback device 100. The quartz oscillator 159 provides a clock signal to the processor 151 and other components in the media material playback device 100. The timers 50 and 60 may be composed of circuits, computer programs or a combination thereof, respectively for timing solids The period of the fixed length. A timer 50 or 60 expiration generates a signal to inform the end of the timed period. The input/output device 160 includes a control button, an alphanumeric keyboard, a touch panel, a touch screen, and a plurality of light emitting diodes (LEDs). The controller 165 detects and controls the operation and operation of the input/output device 160, and transmits the detected operation to the processor 151. The processor 151 can control the input/output device 160 through the controller 165. The 埠164 can be connected to a variety of computerized interfaces, such as an external computer device or peripheral device. The 埠164 may be an entity conforming to the standards of the universal serial bus (USB) or the Institute of Electrical and Electronics Engineers (IEEE), 1394, and the Electronic Industries Association (EIA). ) The physical connection port 埠, Serial ATA (Recommended Standard-232, RS-232) and/or Recommendation No. 11 (RS-11) , referred to as SATA) and / or High Definition Multimedia Interface (HDMI).

The non-volatile memory 153 stores operating systems and applications executed by the processor 151. The processor 151 loads the running program and data data from the non-volatile memory 153 into the main memory 152 and stores the digital content in the mass storage device 154. The main memory 152 may be a random access memory (RAM), such as a static random access memory (SRAM) or a dynamic random access memory (Dynamic RAM, DRAM for short). ). The non-volatile memory 153 may be an Electronically Erasable Programmable Read-Only Memory (EEPROM) or a flash memory, such as a reverse (NOR) flash memory. Or reverse (NAND) flash memory.

The content protection unit 157 provides access control for the digital content generated by the image processing apparatus 100. The content protection unit 157 includes an implementation number Memory and necessary devices required for the Universal Interface for Video Broadcasting (DVB-CI) and/or Conditional Access (DVB-CA). The video processing device 100 can acquire digital content from digital signals transmitted from an antenna, a tuner, and a demodulator. In another embodiment, the image processing apparatus 100 can obtain digital content from a network such as the Internet through a network access interface.

The image output unit 162 includes a filter and an amplifier for filtering and amplifying the video output by the processor 151. The audio output unit 161 includes a digital analog converter for converting the audio signal output by the processor 151 from a digital format to an analog format.

The display 155 displays text and images, and may include electronic paper, an OLED organic light emitting diode (OLED), a field emission display (FED), or a liquid crystal display (liquid crystal display, Referred to as LCD). Alternatively, display 155 described above may comprise a reflective display, such as an electrophoretic display, or a display that utilizes an interferometric modulation of light. The display 155 can display various graphical user interfaces (GUIs) as virtual control elements, including but not limited to windows, scroll axes, icons, and scrapbooks. The display 155 described above may include a single display or a plurality of displays of different sizes. The processor 151 described above can display the GUI described below on the display 155 described above.

The I/O unit 160 includes a touch detector 167 for detecting a touch operation on the display 155. The touch detector 167 can include a transparent touch panel over the display 155, or an optical touch transmitter and receiver array disposed on the frame of the display 155, such as disclosed in US Patent Publication No. 20090189878.

2. Implementation of media material playback device operation

FIG. 2 shows a module related to the media material playback apparatus 100 and the media material replay. Components 240-280 can be implemented in a circuit, such as by A part of the components of the DSP in the processor 151 or a computer program executed by the processor 151 described above. The computer program can be stored in the main memory 152, the non-volatile memory 153 or the mass storage device 154. The media material playback device 100 may include a buffer register unit 240 having a first buffer register 241, a second buffer register 242, and a third buffer register 243. Each of the buffer registers 241-243 may be a reserved area of the main memory 152 or the non-volatile memory 153. The receiver 230 receives the media stream 231 from the communication unit 156 and outputs it to the capture unit 240. The media data stream 231 includes synchronized video and audio data, which may be in accordance with the International Organization for Standardization (ISO) or the International Electrotechnical Commission (IEC) ISO/IEC 13818- 1. ISO/IEC 13818-1 is an announcement of H.222, which defines a packetized elementary stream (PES) and a transport stream (TS). For example, the media data stream 231 includes a plurality of PES data streams. Each PES data stream is then encapsulated into a plurality of TS packets.

Referring to FIG. 3 and FIG. 4, the capturing unit 240 copies and stores the first segment 2311 of the media data stream 231 as a first replica and a second replica in the first buffer register 241 and the second buffer temporary storage. 242. The first copy of the first segment 2311 in the first buffer register 241 is output from the capture unit 240 to the first parser 251 for analysis. Next, the first copy that has been parsed by the first segment 2311 is output from the first parser 251 to the first decoder 261 for decoding. The combiner 270 combines the video from the first duplicate that has been decoded by the first segment 2311 described above, and displays the combined video on the display 155. The buffer registers 241 and 243 each have a display unit for pointing to the media data therein, and the display unit pointed to by the index is prepared to be output from the capture unit 240 to the parser unit 250 and the decoder unit. 260 and combiner 270 for Anatomy, decoding and display. The above-described capturing unit 240 points the index to the next display unit after the output unit has been output after outputting the display unit, and repeats the program. The parsers 251 and 252 respectively analyze the media data according to the multimedia data stream standards, such as the standards of the International Telecommunication Union (ITU) standard H.222 and Flash Video (FLV). For example, the first copy of the first segment 2311 described above. The above decoders 261 and 262 respectively decode the media data according to a multimedia codec standard, such as H.264, VC-1, MPEG-2, MPEG-4 standard, or FLV standard, for example, the first section 2311 has been The first copy of the analysis.

Referring to FIG. 5, when the processor 151 receives a replay instruction for replaying the media stream 231 from the input/output unit 160 or the communication unit 156, the capturing unit 240 generates the second portion of the first segment 2311. A third copy of the replica is stored in the third buffer register 243 in response to the replay command. The second sector 2312 of the media stream replaces the first and second replicas of the first buffer register 241 and the second buffer register 242.

The parser unit 250 uses the first parser 251 and the second parser 252 to parse the second portion 2312 and the third buffer register 243 of the first buffer register 241 in parallel processing. The third copy.

The decoder unit 260 decodes the parsed second segment 2312 and the parsed third replica in a parallel processing manner by the first decoder 261 and the second decoder 262, respectively.

The combiner 270 combines the video signals from the decoded third copy of the first segment 2311 and the second segment 2312. The combiner 270 can combine the second segment 2312 video signals into relatively large images, and combine the third replica video signals into relatively small images to overlap the larger images. The display 155 displays the video signal.

2.1 shows the progress axis

When displaying the first representation unit in the third replica of the first segment 2311, the combiner 270 displays a progress axis for indicating the length of the first representation unit relative to the length of the third replica in the third replica. position. The first representation unit may be a unit of a PES or TS data stream, such as a PES packet, a TS packet, a PES data stream containing P, I, and B frames or a TS data stream. The progress axis renderer 282 in the user interface unit 280 can be based on the program time reference (PCR) of the TS packet in the third copy, or the play time stamp of the PES packet in the third copy (presentation) a time-stamp (referred to as DTS) or a decoding time-stamp (DTS), or a time stamp of the FLV data stream packet in the third replica, to calculate the length of the third replica of the first segment 2311. And a position of the first representation unit in the third replica relative to the length of the third replica.

2.2 Based on PCR calculation progress axis

For example, the renderer 282 obtains the first PCR value PCR1 and the last PCR value PCR2 in the TS packet in the third buffer register 243, and obtains the profile being analyzed by the second parser 252. The PCR value PCRi of the first representation unit described above. The above-described progress axis renderer 282 calculates the following formula (1) to obtain the length L1 of the above-described third copy, and calculates the following formula (2) to obtain the progress P1 corresponding to the above-described first representative unit.

L1 = PCR2 - PCR1 (1)

P1 = PCRi - PCR1 (2)

The progress axis renderer 282 calculates the following formula (3) to obtain a ratio R1 of the progress P1 of the first indicating unit with respect to the length L1 of the third copy.

R1 = P1/L1 (3)

Referring to FIG. 6, the renderer 282 draws a progress axis 300 of length L0, wherein the length of the segment 301 is L0×R1 to indicate the first representation. The progress and position of the unit relative to the total length of the third copy of the first segment 2311 described above. The left end of the above segment 301 is aligned with the left end of the progress axis 300 described above. The progress axis renderer 282 can use other symbols, such as the graphic 31, to display the position of the first display unit. The progress axis renderer 282 outputs the progress axis 300 to the combiner 270 described above. As shown in FIG. 6, the combiner 270 combines the video of the progress axis 300 and displays it on the display 155. The combiner 270 can display the progress axis 300 on the area A1 by using an on screen display (OSD), and the area A1 is used to display the video decoded from the second section 2312. The area A2 is used to display the video decoded from the third copy of the first section 2311.

2.3 Based on PTS calculation schedule axis

In the example of displaying the replay progress by the PTS, the renderer 282 obtains the first PTS value PTS1 and the last PTS value PTS2 in the PES packet in the third buffer register 243, and obtains the combiner being obtained by the above-mentioned combiner 270 performs the display of the PTS value PTSi of the first display unit. The above-described progress axis renderer 282 calculates the following formula (4) to obtain the length L1' of the above-described third copy, and calculates the following formula (5) to obtain the progress P1' corresponding to the above-described first representative unit.

L1' = PTS2 - PTS1 (4)

P1' = PTSi - PTS1 (5)

The above-described progress axis renderer 282 calculates the following formula (6) to obtain a ratio R1' of the progress P1' of the first indicating unit with respect to the length L1' of the third copy.

R1' = P1'/L1' (6)

The renderer 282 draws a progress axis 300 of length L0, and the segment length L0×R1' is used to indicate the progress of the total length of the third copy of the first display unit relative to the first segment 2311 and position. The progress axis renderer 282 outputs the progress axis to the combiner 270. The combiner 270 combines the video of the progress axis and displays it on The display 155 is described.

2.4 Based on DTS calculation schedule axis

In the example in which the DTS is used to display the replay progress, the renderer 282 obtains the first DTS value DTS1 and the last DTS value DTS2 in the PES packet in the third buffer register 243, and obtains the decoder being obtained by the above decoder. 262 performs decoding of the DTS value DTSi of the first representation unit. The progress axis renderer 282 calculates the following formula (7) to obtain the length L1" of the third copy described above, and calculates the following formula (8) to obtain the progress P1" corresponding to the first representation unit.

L1" = DTS2 - DTS1 (7)

P1” = LTSi - DTS1 (8)

The above-described progress axis renderer 282 calculates the following formula (9) to obtain a ratio R1" of the progress P1" of the first indicating unit with respect to the length L1" of the third copy.

R1" = P1"/L1" (9)

The renderer 282 draws a progress axis 300 of length L0, and the segment length L0×R1” is used to indicate the progress of the total length of the third copy of the first display unit relative to the first segment 2311 and The progress axis presenter 282 outputs the progress axis to the combiner 270. The combiner 270 combines the video of the progress axis and displays it on the display 155.

2.5 positioning representation unit

Referring to Figures 7, 8, and 9, the indicator 2431 of the third buffer register 243 is directed to the first representation unit 23111 of the third replica of the first section 2311. When the media material playback device 100 is displaying the first display unit 23111 (step S2), the locator 281 in the user interface unit 280 receives an input signal from the input/output unit 160, and the input signal is indicated on the progress axis. A selected position in 300, such as position 302 in Figure 6 (step S4). In response to the received input signal, the locator 281 is from the first segment 2311 according to the selected position. The second representation unit 23112 is found in the three replicas (step S6), and the cleaning instruction is sent to the second parser 252 and the second decoder 262 to clear the media data therein (step S8), so that the indicator 2431 points to the second representation. The unit 23112 (step S10), thereby causing the media material playback apparatus 100 to play the second display unit 23112 (step S12). In response to step S8, the capturing unit 240 outputs the second indicating unit 23112 to the second parser 252 for parsing, and outputs the parsed second indicating unit 23112 to the second from the second parser 252. The decoder 262 performs decoding. The combiner 270 displays the combined video from the decoded second display unit 23112 and displays it on the display 155.

The manner in which the second representation unit 23112 is located in step S6 is described in detail below. For example, the locator 281 calculates a distance R2 from the left end of the progress axis 300 to the position 302 and a ratio R2 = L2 / L0 of the distance L2 with respect to the length of the progress axis 300. For example, if the memory space of the third buffer register is a J byte and the start address is K0, the locator 281 finds the address K1 in the third buffer register. Where: K1=K0+J×R2 (10)

The locator 281 obtains the indicator 2431 and directs the indicator 2431 to the target address K1. After the cleaning instruction, the third buffer register continuously outputs the media data to the second parser 252 according to the target address indicated by the indicator 2431, and the second parser 252 receives the complete PES. The packet is previously ignored by the media, and the PES packet is parsed after receiving the complete PES packet, and the second decoder 262 ignores the media data until the I frame (intraframe or I frame) is received, and the I frame is received. Continue to decode the I frame, its associated P frame (predicted frame or P frame), and B frame (bi-directional predictive frame or B frame).

2.6 tailoring replayed media material

The media data playing device 100 plays the third buffer temporary storage The entirety of the third copy in the device responds to the replay instruction. When the locator 281 receives the two selected demarcation points on the progress axis 300, the two demarcation display units are found in the third replica according to the two demarcation points, and the media data playing device 100 is instructed to play. The portion of the third replica defined by the two demarcation representation units is responsive to other replay instructions. The above two demarcation representation units may be referred to as bookmarks.

The input/output unit 160 generates a signal indicating the two selected boundary points of the progress axis 300. For example, the touch detector 167 can simultaneously detect two contact points on the display 155. When the touch detector 167 simultaneously detects two contact points moving on the progress axis 300 and then leaving the progress axis 300, the two contact points are separated from the two positions of the progress axis 300 as the above. Two selected cut points.

2.7 non-platform dependent user interface

Referring to FIG. 9, the media material playing device 100 further includes a user interface converter 290 for converting the progress axis drawn by the renderer 282 into a non-job system dependent and non-browser dependent user interface, such as a web page 294. Or interface tool set (widget). The update unit 295 and the detecting unit 296 are integrated in the user interface. For example, when the mobile device 400 is connected to the Internet Protocol (IP) address of the media material playback device 100 and issues a HyperText Transfer Protocol (HTTP) request, the device 100 The web server 292 in the web transmits the web page 294 to the mobile device 400 described above in response to the HTTP request. The mobile device 400 receives and displays the web page 294 from the media material playback device 100, and the update unit 295 periodically issues an HTTP request to the web server 292 to request the progress axis 300 updated by the renderer 282. The web server 292 transmits the updated progress axis 300 to the mobile device 400 in response to the periodically issued HTTP request. The mobile device 400 described above displays the progress of the updated display on the displayed web page 294. Axis 300.

The mobile device 400 can include an input device, such as a touch screen, to detect the selected location of the progress axis 300. The detecting unit 296 received by the mobile device 400 detects the selected location of one or more of the progress axes 300 and transmits the selected one or more selected locations to the web server 292 by HTTP request. The web server 292 receives and forwards the HTTP request with the one or more selected locations to the locator 281. The above-described media material playback device 100 responds to the selected location of one or more of the above in the manner described above.

In FIG. 9, elements 290, 292, 295, and 296 in the above-described media material playback apparatus 100 may be computer programs. The above elements 295 and 296 may be JavaScript code. The above HTTP request may include XMLHttpRequest (XHR) or simple simple syndication (RSS) used in asynchronous JavaScript and eXtensible Markup Language (XML) technology (asynchronous JavaScript and XML, AJAX for short). The update request used in ).

3. Replay location switching

The above-described media data playback device 100 can perform the positioning method disclosed in the patent document entitled "AUDIO PLAYBACK POSITIONING METHOD AND ELECTROINC SYSTEM UTILIZING THE SAME" in US Patent Application No. 12,543,588 to obtain the above-described selected position in the progress axis 300. The locator 281 can be constructed with a computer program executed by the processor 151, and the processor 151 executes the locator 281 to operate an implementation of the following positioning method.

Embodiments using the above positioning method are as follows.

Referring to FIG. 10, the keyboard 40a shown in FIG. 10 is an embodiment of the input/output unit 160 or the input device of the mobile device 400. The keyboard 40a may be a physical keyboard of a mechanical structure or displayed on A virtual keyboard on display 155. The keyboard has buttons 201-217. The keys 213 and 214 are function keys whose functions differ depending on the software program executed by the media material playback apparatus 100. Button 215 is an off-hook button; button 216 is an on-hook button. The button 217 is a direction key for controlling the moving direction of the cursor shown on the display 155. The touch operating points 218a, 219a, 220a, and 221a respectively drive the cursor to move up, right, and left. The numbers, letters, and/or symbols corresponding to the keys 201 to 212 are shown on the respective keys in FIG. 10, but are not intended to limit the present invention.

The media material playback device 100 described above can receive numbers or symbols from the mobile device 400 via the channel 401. For example, the detecting unit 296 in the mobile device 400 detects an input number received by the mobile device 400 and transmits the digital number to the web server 292 by transmitting an HTTP request that records the number. The web server 292 receives the HTTP request and sends it to the locator 281. The above-described media material playback apparatus 100 responds to the above numbers in accordance with the positioning method described below.

The data processed by the positioning method can be referred to as a "object to be processed". A segment of the object to be processed is called a segment. The selected location on the object to be processed may be a predetermined location of the segment thereon, such as the start, end or intermediate point of the segment. In the following description, the length of the object to be processed is assumed to be D. When the processor 151 applies the positioning method to the section 2311 of the media material 231, the total length thereof may be a data size or a memory size measured by a byte, or a section of the media data 231 expressed in a specific time unit. The total playback time of 2311, where the time unit is, for example, minutes or seconds. The above total play time is a period from the start of playback of the section 2311 of the media material 231 to the playback of the schedule. A media stream or a section of it can be called a project.

The numbers input by the above-described input/output unit 160 to the media material playback device 100 may be used to perform different functions. For example, the number is entered as the phone code number for the media material playback device 100 to make a call or send a text message, or as a broadcast channel number for the media material playback device 100. Select and switch to the channel corresponding to the number. In the following embodiments, the number received by the above-described media material playback apparatus 100 is used as an index for positioning of an object to be processed (for example, the progress axis 300 or the section 2311). The media material playback device 100 needs to determine the function corresponding to the received number. However, the positioning method described below can be implemented by a computer program and executed on the media material playback device 100 or the mobile device 400. In the embodiment of the positioning method described below, the number can be received from the key operation of the input/output unit 160 or the mobile device 400, or the number can be received from the input/output unit 160 or the touch device of the mobile device 400 via text recognition.

3.1 positioning method

Referring to FIG. 11, after receiving the input number of the input/output unit 160 (step S30), the processor 151 determines whether the media material playback apparatus 100 is in the video playback mode (step S31). When the media material playback device 100 is not in the video replay mode, the processor 151 uses the received input number for other functions, for example, as a phone number or channel number (step S32). When the media material playback apparatus 100 is in the video replay mode, the processor 151 uses the received digits to locate the progress axis and the media data section (step S33). For example, the processor 151 displays the replay mode related user interface of the video on the display 155 in the video replay mode to replay the image segments in the third buffer register. In step S33, after the processor 151 acquires a specific location or segment in the video segment, it is determined whether the media material playback device 100 is replaying the video segment (step S34). If so, the processor 151 can directly perform a preset video operation on the acquired specific location or segment (step S37). If not, the processor 151 receives the video operation option (step S35), and performs a video operation corresponding to the option for the image segment (step S36). For example, the video operations in steps S35 and S37 include video replay, fast forward, rewind, or bookmark setting. The preset video operation in step S37 may be a video playback operation. The input and output unit 160 can include corresponding buttons for video operation options, and the processor 151 can also display video operation options to the display 155.

There are various embodiments of the positioning method in step S33, which are exemplified below. The media material playback device 100 utilizes a timer to time a predetermined period of operation. During the predetermined operational period, if the processor 151 receives more digits, the more specific unit or segment in the video segment 2311 can be acquired in more precise units to perform the video operation. When the processor 151 is playing the video in the current position in the video segment 2311, the forward skip operation is used to drive the playback of the video segment 2311 from the current location to the first target location in the video segment 2311, wherein When the processor 151 plays the video segment 2311, the time for accessing the current location is earlier than the time for accessing the first target location, and the backward operation for driving the video segment 2311 is switched from the current location to the video zone. The second target location in the segment 2311, wherein the processor 151 accesses the second target location when the video segment 2311 is played earlier than the time to access the current location. It is to be understood that the segment of the object to be processed represents a part of its composition, or a sub-segment of the component. A sub-segment is a smaller-sized segment.

An embodiment in which the video section 2311 is segmented into an arbitrary division will be described below.

3.2 First embodiment of the positioning method

Referring to FIG. 12, the first embodiment of the method for positioning the media material playing device 100 performs the media material playing on the display 155. In the following description, only the user interface element of the currently active media material playback device 100 is the progress axis 300 of the video segment 2311 as an example. The progress axis 300 is a representative of the video segment 2311. Therefore, when the processor 151 applies the positioning method to the video segment 2311 to obtain a selected position or segment, the selected position or segment is also correspondingly acquired on the progress axis 300. The operation of the representative of the object to be processed (e.g., the progress axis 300) during execution of the positioning method corresponds to the operation on the object to be processed (e.g., video section 2311). Alternatively, the processor 151 may apply the positioning method to the progress axis 300 to obtain a selected position or segment, and correspondingly find a corresponding position in the video segment 2311. Select a location or clip. The processor 151 may also be in a parallel processing manner, such as a thread or a process that is executed synchronously, while using the above positioning method in the video segment 2311 and the progress axis 300.

The processor 151 receives the input first number m and the second number n from the input and output unit 160 (step S320). For example, both m and n are numbers, and 0≦m≦9 and 0≦n≦9. The processor 151 returns the received first number m to the object to be processed as a combination of m segments, that is, the video segment 2311 and its corresponding progress axis are segmented into m segments (step S322). The length of each segment of the video segment 2311 is D/m. Referring to FIG. 13, if m=5, n=2, the processor 151 divides the progress axis 300 into five segments, and the processor 151 divides the video segment 2311 into five segments, that is, the number of segments is first. The number m is determined. For example, in step S322, the processor 151 divides the total length of the video segment 2311 by D as the new unit of the video skip operation, and obtains the corresponding play time 0, D/5, 2D on the video segment 2311. The positions of /5, 3D/5, 4D/5, and 5D/5 are used to distinguish the 5 segments. Each segment of the video segment 2311 has a length of D/5.

The processor 151 responds to the received second number n to obtain the nth specific segment of the m segment of the object to be processed, that is, the nth specific part of the m segment of the video segment 2311 and its progress axis. Fragment (step S324). Referring to FIG. 13, if m=5, n=2, the processor 151 obtains the second segment in the video segment 2311, that is, the segment 72B, and its corresponding segment 72A on the progress axis 300, where the end of the segment Indicated by the graph 31. The sequence of segments taken by processor 151 is determined by the second number n.

The processor 151 performs a video operation on the acquired specific segment, that is, performs a video operation on the nth specific segment (step S326). As shown in FIG. 13, the processor 151 can play the video section 2311 from the back end position 72 of the specific segment in step S326, and the corresponding position of the position 72 on the progress axis 300 is indicated by the graphic 31. However, this is not intended to limit the present invention, and the processor 151 may start playing the video section 2311 from the front end, the back end, the middle, or other position of the specific segment in step S326.

After step S326, steps S320-S326 of FIG. 12 may be repeated when the processor 151 receives the two digits again to process the video section 2311 again. Referring to FIG. 14, if m=4, n=3, the processor 151 divides the progress axis 300 into four progress axis segments, and divides the video segment 2311 into four video segments, and selects the third segment of the progress axis 300. The progress axis segment acquires the end position 73 of the third segment in the video segment 2311. The processor 151 can display that the colors of the first to third progress axis segments of the progress axis 300 are different from the colors of the fourth progress axis segment.

A segment in the video segment 2311 corresponding to the segment indicated by the graphic 31 on the progress axis 300 is referred to as a selected segment. The position of the graphic 31 can be changed by the direction key in the input/output unit 160 or by the touch device to the adjacent segment of the segment 72A, thus changing the selected segment to the adjacent segment of the segment 72B. By the direction key operation in the input and output unit 160, for example, the operation point 219a of the actuation button 217 moves the selected segment to the right to the next segment of the right is equivalent to forward skipping, for example The operation of moving the selected segment to the left by the operating point 221a of the moving button 217 is equivalent to backward skipping. Therefore, with this embodiment, the processor 151 can adjust the distance unit of the forward/backward skip operation of the video section 2311 during playback.

In the example of FIG. 13, the processor 151 selects the video segment 2311 segment 72B corresponding to the second segment 72A of the progress axis 300, that is, the second segment of the video segment 2311, and the processor 151 can respond to the operation point of the button 217. 220a is actuated to use the second segment 72B as a new object to be processed, and the specific segment is subdivided into m sub-segments according to the previously received first number m. The length of each sub-segment subdivided by the specific segment 72B of the video segment 2311 is D/m ² . For example, during the execution of the repeating step S322, the processor 151 divides the total length of the segment 72B by D/5 by 5 as a new unit of the video skip operation, and obtains the position on the video segment 2311 corresponding to the following playback time. To distinguish the m sub-segments:

As shown in Figure 15, the progress axis 320 represents the progress axis segment 72A, corresponding to the video segment 72B. The processor 151 subdivides the segment 72A and the segment 72B into 5 sub-segments according to the previously received first number m=5. The five segments in the progress axis 320 represent the five smaller sub-segments in segment 72B. In Fig. 15, the graphic 32 refers to the selected sub-segment, and the position of the graphic 32 corresponds to the position 721 in the segment 72B. Similarly, the button 32 can be used to move the graphic 32 and the other sub-segments can be selected as the selected segment.

On devices without numeric keys, one of the objects to be processed can be selected using the arrow keys or by skipping the operation keys forward or backward.

3.3 Second embodiment of the positioning method

FIG. 16 shows a second embodiment of the positioning method performed by the media material playback apparatus 100. The memory 152 may store in advance a predetermined number z for determining the number of segments of the video segment 2311. The number z can be any positive integer greater than one.

The processor 151 receives the input number c from the numeric keys of the input-output unit 160 (step S330), and starts the timer 50 to count a period of time (step S332).

The processor 151 returns the video segment 2311 and its corresponding progress axis into a predetermined number z segments by the received number c (step S334), and takes the c-th segment therein (step S336). The length of each segment of video section 2311 is D/z. The processor 151 divides the total length of the video section 2311 by D by z as a new unit of video skip operation. For example, z=10 and c=7, as shown in FIG. 17, the processor 151 divides the progress axis 300 into 10 segments, each segment having a length of D/10, and obtaining the seventh segment 77A thereof. The end position of the segment 77A is indicated by a graphic 31. The progress axis 300 is a user interface component currently in use by the media material playback device 100, so The video section 2311 corresponding to the progress axis is the main body of the positioning operation of the processor 151. Corresponding to the progress axis 300, the video segment 2311 is divided into 10 segments, and the seventh segment 77B thereof is obtained according to the number c, corresponding to the segment 77A. Location 779 corresponds to the location indicated by graphic 31.

The processor 151 determines whether the timer 50 is expired (event A), whether the timer 50 has received another number d (event B) from the numeric key of the input-output unit 160 before the expiration (step S338).

If another number d (event B) is received before the timer 50 is not expired, the processor 151 returns another number d to subdivide the specific segment and its corresponding progress axis segment into a predetermined number of z segments (step S340). The d-th segment of the sub-subdivided complex segment is obtained (step S342), and the timer 50 is reset (step S344). The length of each sub-segment subdivided by the particular segment of the video segment 2311 is D/z ² . The processor 151 takes the sub-segment length D/z ² as a new unit of video skip operation. In the example of FIG. 17, for example, z=10 and d=5, the processor 151 subdivides the seventh segment of the video segment 2311 into 10 segments and obtains the fifth segment thereof. As shown in FIG. 18, the processor 151 subdivides the seventh segment 77B of the video segment 2311 into 10 segments and obtains the fifth segment 775B therein. The progress axis 320 of display 155 in Figure 18 represents segment 77A, while segment 77A represents segment 77B. The processor 151 divides the progress axis 320 into 10 segments, and then obtains a fifth segment 775A in the progress axis 320 based on the number d, which represents the segment 775B. Similarly, segment 775B can be subdivided again by repeatedly performing this step of FIG.

If the timer 50 expires (event A), the processor 151 performs a video operation on the acquired segment (step S346). In the example of Figure 18, the video operation begins at the end position 775 of segment 775B.

On a device without a numeric key, one of the video segments 2311 can be selected by using the left button, the right button of the direction key, or skipping the operation button forward or backward, and using the up button, down button or another button to Drive a segment and subdivide it.

3.4 Third embodiment of the positioning method

FIG. 19 shows a third embodiment of the positioning method performed by the media material playback apparatus 100. The equal sign "←" between the first variable and the second variable (or constant) in the following description indicates that the value of the second variable (or constant) is assigned to the first variable.

The media material playback apparatus 100 has complex variables a ₁ , a ₂ , a ₃ , ... a _n , and each of the preset values is set to zero. Each time the processor 151 obtains a digital sequence from the input/output unit 160, it stores one of a ₁ , a ₂ , a ₃ , ... a _n . Referring to FIG 19, a first input of the digital processor 151 from the input-output unit 160 receives the numeric keys e, e stored in digital a _1, i.e., performs a ₁ ← e (step S350), and starts the timer 50 The period of time is counted (step S352).

The processor 151 generates a percentage value based on the number e (step S354), and acquires the position corresponding to the percentage value in the video section 2311 (step S356). For example, the percentage value m is:

When the processor 151 takes the first number e=9, the processor 151 generates a percentage value of 90% according to the number 9 and the formula (1). As shown in FIG. 20, the length from the front end of the video section 2311 to the position 790 is 90% of the total length of the video section 2311. The processor 151 obtains a position 790 in the video section 2311 that corresponds to a percentage value of 90%.

The processor 151 determines whether the timer 50 is full (event A), or whether the timer 50 has received the second number f (event B) from the numeric keys of the input-output unit 160 before the expiration of the timer 50 (step S360).

If the second number f (event B) is received before the timer 50 is not expired, the processor 151 stores the number f in a ₂ , that is, executes a ₂ ← f , and resets the timer 50 (step S362). And based on all received numbers to generate a percentage value to replace the previous percentage value, and generate an address corresponding to the new percentage value to obtain a position corresponding to the new percentage value in the video section 2311 (step S364) .

For example, if e = 9, f = 5 new percentage value m _new = 95%; for example, if e = 0, f = 5 new percentage value m _new = 5%.

Next, the processor 151 obtains the position corresponding to the percentage value in the progress axis 300, and the position corresponding to the percentage value in the video section 2311 (step S366), and repeats step S360.

If the timer 50 expires (event A), the processor 151 performs a video operation in accordance with the acquired position (step S368).

4 Conclusion

In summary, the media material playing device 100 can parse, decode, and play different segments in the media stream data in parallel, wherein one segment is a replay segment. The media data playing device displays the playing progress of the replay section on the progress axis according to the PCR, the PTS or the DTS, and responds to the digital input or the touch operation to provide the replay position switching of the replay section during the replay.

100‧‧‧Media data player

151‧‧‧ processor

152‧‧‧ main memory

153‧‧‧ Non-volatile memory

154‧‧‧Many storage devices

155‧‧‧ display

156‧‧‧Communication unit

157‧‧‧Content Protection Unit

158‧‧‧Power supply

159‧‧‧Crystal Oscillator

160‧‧‧Input and output devices

161‧‧‧Optical output unit

162‧‧‧Image output unit

164‧‧‧埠

165‧‧‧ Controller

167‧‧‧Touch detector

201-217‧‧‧ button

218a‧‧‧Operation point

219a‧‧‧Operation point

220a‧‧‧Operation point

221a‧‧‧Operation point

230‧‧‧ Receiver

231‧‧‧Media data stream

240‧‧‧Capture unit

241‧‧‧First buffer register

242‧‧‧Second buffer register

243‧‧‧ Third buffer register

250‧‧‧Parser unit

251‧‧‧ parser

252‧‧‧ parser

260‧‧‧Decoder unit

261‧‧‧Decoder

262‧‧‧Decoder

270‧‧‧ combiner

280‧‧‧User interface unit

281‧‧‧ Locator

282‧‧‧ renderer

2311‧‧‧First section

2312‧‧‧Second section

2313‧‧‧third section

23111‧‧‧First representation unit

23112‧‧‧Second representation unit

2431‧‧ indicators

290‧‧‧Web Converter

292‧‧‧Web server

294‧‧‧Webpage

295‧‧‧ update unit

296‧‧‧Detection unit

300‧‧‧Progress axis

301‧‧‧Progress axis fragment

302‧‧‧ position

31‧‧‧ cursor graphics

32‧‧‧ cursor graphics

320‧‧‧Progress axis

400‧‧‧Mobile devices

40a‧‧‧ keyboard

50‧‧‧Timer

60‧‧‧Timer

72‧‧ ‧ Location of video material

72A‧‧‧Stage axis fragment

73‧‧ ‧ Location of video material

77A‧‧‧Progress Axis Fragment

77B‧‧‧Video clips

721‧‧‧Location of video material

779‧‧ ‧ Location of video material

775‧‧ ‧ Location of video material

775A‧‧‧Progress Axis Fragment

775B‧‧‧Video clip

790‧‧ ‧ Location of video material

L0‧‧‧Progress shaft length

L2‧‧‧ distance

A1‧‧‧ display area

A2‧‧‧ display area

R1‧‧ ratio

1 is a block diagram showing an embodiment of a media material playing device; FIG. 2 is a block diagram showing an embodiment of a plurality of modules related to a replay function in a media material playing device; and FIG. 3 is a view showing a media data stream according to a receiving time of the device. FIG. 4 is a block diagram showing an embodiment of a media material playing device, which has a duplicated video segment; FIG. 5 is a block diagram showing an embodiment of a media data playing device, which has a buffered video segment; FIG. Schematic diagram of the progress axis; FIG. 7 shows a schematic diagram of the media data locator and the buffer register; FIG. 8 shows a flow chart of the operation of random accessing the cached media data; FIG. 9 shows a schematic diagram of the implementation of the user interface; A schematic diagram of an embodiment of a display keyboard; FIG. 11-12 shows a flow of a plurality of embodiments of a positioning method of media data playback FIG. 13-15 is a schematic diagram showing an exemplary operation of the first embodiment of the positioning method of the media data playing; FIG. 16 is a flowchart showing a second embodiment of the positioning method of the media data playing; FIG. 17-18 shows the above media. FIG. 19 is a flowchart showing a third embodiment of a positioning method of media material playing; FIG. 20 is a flowchart showing a third embodiment of the positioning method of media data playing. Demonstration operation diagram.

Claims (31)

A media data playing device, comprising: a communication unit, comprising a first wireless communication circuit and a second wireless communication circuit, wherein the first wireless communication circuit establishes the first wireless communication of the media data playing device according to the first wireless communication protocol Channel, the second wireless communication circuit according to the second wireless communication protocol to establish a second wireless communication channel of the media data playing device, and the communication unit via one of the first wireless communication channel and the second wireless communication channel Receiving a playable media data stream; a memory for storing playable media data of the playable media data stream received by the communication unit; and a processor for providing association with the playable media data a media playback control function; and a network device configured to use the first wireless communication channel established by the first wireless communication circuit and the second wireless communication channel established by the second wireless communication circuit, and according to a wireless local area network Agreement to provide wireless network communication access point Wherein the access point function to provide connectivity to the WAN connection via the first wireless communication channel and the second wireless communication channel. The media data playing device according to claim 1, wherein the media data playing device is a mobile electronic device, the first wireless communication protocol includes the wireless local area network protocol, and the second wireless communication protocol includes a honeycomb Protocol. The media material playing device of claim 1, further comprising: a content protection system for providing access protection for the digital content of the playable media material. The media data playing device of claim 1, further comprising: a web server for responding to the media data playing device connected to the media data playing device The connection of the identification code works and provides the above-described media playback control function via one of the first wireless communication channel and the second wireless communication channel. The media data playing device according to claim 1, further comprising: a first computing circuit; and a second computing circuit, wherein the first computing circuit and the second computing circuit are processed in parallel by the processing Two sets of digital data downloaded by the communication unit. The media data playing device of claim 5, further comprising: a first computer program; and a second computer program, wherein the first computer program and the second computer program are processed in parallel by the processing Two sets of digital data downloaded by the communication unit. The media material playing device according to claim 5, wherein the first arithmetic circuit and the second arithmetic circuit respectively analyze the two sets of digital data by a parallel processing method according to a data stream protocol. The media material playing device according to claim 5, wherein the first arithmetic circuit and the second arithmetic circuit respectively decode the two sets of digital data by a parallel processing method according to a data decoding protocol. The media data playing device of claim 5, further comprising: a processor chip, configured to integrate the first computing circuit, the second computing circuit, and a controller of the communication unit to process the A digital signal processing unit for playing a media stream, and the processor, wherein the processor includes a central computing unit of the media material playback device. The media data playing device of claim 5, wherein the processor uses the first computing circuit and the second computing circuit, and via the first wireless communication channel and the second wireless communication channel One of the channels provides the above media playback control function. The media data playing device of claim 1, further comprising: a buffer register comprising first, second and third buffer registers; a capture unit for copying and separately storing the above The first segment of the media data stream becomes the first copy and the second copy in the first and second buffer registers, and the third copy of the second copy is generated and stored in the third buffer register in response to the replay An instruction, wherein the second section of the media data stream replaces the first replica and the second replica in the first and second buffer registers; a parser unit including the first and second parseres for parallel processing The method respectively parses the second segment of the first buffer register and the third replica of the third buffer register; and a decoder unit, wherein the first and second decoders respectively decode the data in parallel processing Parsing the second segment and the parsed third replica; and a combiner for combining the video signals from the decoded third replica and the decoded second segment. The media data playing device of claim 1, wherein the processor is connected to a display through an electrical connection or through wireless communication, and when the stored first display unit of the playable media material is displayed, The processor displays a progress axis as part of the media playback control function for displaying the position of the first display unit relative to the playable media data, and the media data playing device further includes: a locator for receiving a selected location on the progress axis, and obtaining a second representation unit from the stored playable media material based on the selected location, wherein the processor displays the acquired second representation unit in response to the selected location. The media data playing device according to claim 12, wherein the first indicating unit comprises a packetized basic data stream and a data stream. Or the unit of the flash video stream. The media data playing device according to claim 12, further comprising: a progress axis presenter, configured to refer to a program time reference of the transportable data stream packet according to the playable media data, and a packetization basicization of the playable media data. Calculating the stored length of the playable media data, and the first representation unit relative to the time stamp of the playback time stamp or the decoding time stamp of the data stream packet or the flash video stream packet of the playable media data The location where the above media data can be played. The media data playing device of claim 12, wherein when the processor receives two selected demarcation points on the progress axis, the locator is based on the two demarcation points in the stored Two demarcation representation units are found in the playable media data, and the processor plays the portion of the stored playable media data that is defined by the two demarcation representation units in response to the replay instruction. The media data playing device of claim 12, wherein the processor is configured to perform a positioning method, wherein the positioning method comprises: the processor, as part of the stored length of the playable media data Storing the length of a first video segment of the playable media data; the processor, by using the length of the first video segment as the first unit, performing the first forward or backward on the stored playable media data And operating, to obtain a second video segment of the stored playable media data; the processor, according to the operation of the input device, using a portion of the length of the second video segment as a length of a sub-segment of the second video segment And the processor, by using the length of the sub-segment as a second unit, performing a second forward or backward skip operation on the second video segment to obtain the selected location in the second video segment, where the second Unit is smaller than Said the first unit. The media data playing device of claim 12, further comprising: a timer for timing a predetermined period; an input device responsive to the operation to generate a number; wherein the processor is electrically connected to the timer And the input device, performing a positioning method for playing to obtain the selected location, the method comprising: receiving a first number N from the input device, and starting the timer; responding to the received number N, parsing the stored The playable media data is a concatenation of the plurality of segments, obtaining the Nth segment in the playable media data; determining whether the timer receives a second second number M from the input device before the expiration; if the timer After the expiration of the second number M, the first playback operation is performed on the obtained Nth segment, wherein the selected location is a location on the Nth segment; and if the timer is not expired When the second number M is received, the Nth segment is parsed into a concatenation of the plurality of segments, the Mth sub-segment in the Nth segment is obtained, and the timer is reset. And performing a second playback operation on the Mth sub-segment in response to the timer expiration after receiving the second digit M, wherein the selected location is a location on the Mth sub-segment. The media material playing device of claim 1, wherein the media data playing device comprises a mobile phone for dialing a telephone communication or ending a telephone communication through a cellular communication channel. A media data playing device, comprising: a communication unit, comprising a first wireless communication circuit and a second wireless communication circuit, wherein the first wireless communication circuit establishes the first wireless communication of the media data playing device according to the first wireless communication protocol Channel, the second wireless communication circuit is configured to establish the media resource according to the second wireless communication protocol a second wireless communication channel of the material playback device, and the communication unit receiving one or more data streams having digital content via one of the first wireless communication channel and the second wireless communication channel; a data stream processing unit Processing the first segment and the second segment of the one or more data streams in a parallel processing manner according to a data stream protocol; a processor for providing an association with the first segment and the second segment a human-machine operation control function for digital content; and a network device for utilizing the first wireless communication channel established by the first wireless communication circuit and the second wireless communication channel established by the second wireless communication circuit, and according to The wireless local area network protocol provides a wireless network communication access point function, wherein the access point function provides a connection function for connecting to the wide area network via the first wireless communication channel and the second wireless communication channel. The media data playing device of claim 19, wherein the one or more data streams comprise a playable media data stream, and the data stream processing unit comprises: a parser unit, including a first parser and a second a parser, and performing parallel parsing processing on the first segment and the second segment by using the first parser and the second parser, wherein the parallel parsing processing comprises parsing the first parser in a parallel processing manner The first segment and the second segment are parsed by the second parser; and a decoder unit includes a first decoder and a second decoder, and the first decoder and the second decoder are used to Performing a parallel decoding process on a segment and the second segment, wherein the parallel decoding process includes decoding the first segment by the first decoder and decoding the second segment by the second decoder in a parallel processing manner; The operation control function is based on the control functions of the decoded first segment and the second segment. A media material playing device as claimed in claim 20, The data stream processing unit includes: a combiner configured to combine the video signals from the decoded first segment and the second segment. The media material playing device of claim 19, wherein the media data playing device comprises a mobile phone for dialing a telephone communication or ending a telephone communication through a cellular communication channel. The media data playing device of claim 19, further comprising: a web server for responding to the connection work of the identification code connected to the media material playing device, and via the first wireless communication channel and the foregoing One of the channels of the second wireless communication channel to provide the above-described human-machine operation control function. The media data playing device of claim 19, further comprising: a processor chip for integrating the data stream processing unit, the controller of the communication unit, and the processing of the one or more data streams. A digital signal processing unit, and the processor, wherein the processor comprises a central computing unit of the media material playing device. The media data playing device of claim 19, wherein the processor utilizes one of the first wireless communication channel and the second wireless communication channel to provide the human-machine operation control function. The media data playing device of claim 19, wherein the processor is connected to a display through an electrical connection or through wireless communication, and when displaying the first display unit of the playable media material in the digital content, The processor displays a progress axis as part of the human-machine operation control function for displaying the position of the first display unit relative to the playable media data. The media data playing device further includes: a locator for Receiving a selected position on the progress axis, and obtaining a second representation unit from the playable media data according to the selected location, wherein the processor displays the obtained second representation unit back The location should be selected as above. The media data playing device of claim 26, wherein the first indicating unit comprises a unit for packetizing a basic data stream, a transport data stream or a flash video data stream. The media data playing device of claim 26, wherein the media data playing device is a mobile electronic device, further comprising: a progress axis presenter for packetizing the data stream according to the playable media data. Calculating the stored playable media by reference to the program time reference, the play time stamp or the decoding time stamp of the packetized basic data stream packet of the playable media data, or the time stamp of the flash video stream packet of the playable media data. The length of the data and the position of the first representation unit relative to the playable media material. The media data playing device of claim 26, wherein when the processor receives two selected demarcation points on the progress axis, the locator is in the playable medium according to the two demarcation points. Two demarcation representation units are found in the data, and the processor plays the portion of the playable media data defined by the two demarcation representation units in response to the replay instruction. The media data playing device of claim 26, wherein the processor is configured to perform a positioning method, the positioning method comprising: the processor using a part of the length of the playable media material as the playable medium a length of a first video segment of the data; the processor, by using the length of the first video segment as a first unit, performing a first forward or backward skip operation on the playable media data to obtain the playable media data a second video segment; the processor, according to the operation of the input device, using a portion of the length of the second video segment as a length of a sub-segment of the second video segment; and the processor is configured to use the length of the sub-segment a second unit performing a second forward or backward skip operation on the second video segment to obtain the foregoing The selected location in the two video segments, wherein the second unit is less than the first unit. The media data playing device of claim 26, further comprising: a timer for timing a predetermined period; an input device responsive to the operation to generate a number; wherein the processor is electrically connected to the timer And the input device, performing a positioning method to play to obtain the selected location, the method comprising: receiving a first number N from the input device, and starting the timer; responding to the received number N, parsing the playable The media data is a concatenation of the plurality of segments, obtaining the Nth segment in the playable media data; determining whether the timer receives a second second number M from the input device before the expiration; if the timer expires If the second number M is not received, performing a first playing operation on the obtained Nth segment, wherein the selected position is a position on the Nth segment; and if the timer is not expired before receiving The second number M, parsing the Nth segment into a concatenation of the plurality of segments, obtaining the Mth sub-segment in the Nth segment, and resetting the timer, and returning Receiving the timer expiration after the second number M, performing a second playing operation on the Mth sub-segment, wherein the selected position is a position on the Mth sub-segment.