KR101497701B1 - Reproducing apparatus and method by using scalable video coding - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a playback apparatus and method using scalable video coding, and more particularly, to a playback apparatus and method capable of extending a playback time by converting a resolution according to a remaining capacity of a battery. A storage unit 20 for storing data coded using scalable video coding (SVC); a memory 20 for storing time, space, and image quality scalers A controller 40 for extracting the scalability from the table storage unit 30 so that the selected content can be reproduced entirely, And a playback unit 50 for converting and reproducing spatial and image quality scalability. According to the present invention, by converting the resolution, the number of frames and the SNR value according to the remaining capacity of the battery, it is possible to reproduce all the contents currently being played before the power consumption of the battery is completely consumed. According to the specific mode set by the user, , The number of frames, and the SNR value, thereby improving the user's satisfaction.

SVC, scalability, scalable video coding, battery

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing apparatus and method using scalable video coding,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a playback apparatus and method using scalable video coding, and more particularly to a playback apparatus and method using scalable video coding capable of extending a playback time by converting a resolution according to a remaining capacity of a battery will be.

Transcoding means converting the bit rate or format of the media in real time. The transcoding has the advantage that it can be used to transmit data with a bit rate optimized for changing network conditions.

However, according to the transcoding scheme, it is practically difficult to detect a change in the network transmission rate for a short period of time. Therefore, it is generally used to generate streams that can adapt to long-term transmission rate changes.

In addition, since the transcoding requires a large number of operations, when a plurality of streams are processed in real time, there is a problem of excessive cost. Also, the transcoding can be used in the case of generating a stream having a bit rate and format that can be processed in consideration of a format and an operation capability supported by various types of terminals.

Meanwhile, with the recent development of the technology, it becomes possible to reproduce multimedia contents in portable electronic devices such as PMP (Portable Multimedia Player), PDA (personal digital assistant), mobile phone, and navigation.

At this time, the multimedia contents can be downloaded from the Internet medium or can be reproduced using a storage medium such as a CD or a DVD. Especially, in recent years, UCC (User Created Content), in which contents created by users themselves are disclosed online, is becoming popular.

At this time, the portable electronic device has a tendency to miniaturize the size of the battery mounted on the portable electronic device, because the portable electronic device is important for reproducing the multimedia contents or for connection to the wireless Internet while moving.

However, the above-described conventional techniques have the following problems.

That is, when a bit rate and a format are converted in real time from a basic content by a transcoding method, there is a problem that one resolution, a number of frames, and a signal-to-noise (SNR) value are determined at a time.

In the related art, if the battery remaining capacity of the portable electronic device is less than a predetermined value, the currently reproduced contents can not be reproduced completely and the power of the battery may be exhausted during reproduction.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a method and apparatus for reproducing multimedia contents using a portable electronic device, The present invention also provides a playback apparatus and method that can reproduce all content currently being played back before the power of the battery is exhausted.

According to an aspect of the present invention for achieving the above object, the present invention provides a video signal processing apparatus including a capacity detection unit for detecting a remaining capacity of a battery, and a storage unit for storing data encoded using scalable video coding (SVC) A table storage unit for storing consumption power according to time, space, and picture quality scalability; and a storage unit for storing all of the selected contents using the remaining reproduction time of the contents selected by the user input and the remaining capacity of the detected battery And a playback unit for converting the time, space, and image quality scalability according to a result of the extraction, and reproducing the time, space, and image quality scalability.

At this time, the controller may re-extract the scalability if the remaining playback time of the currently playing content exceeds the playback time due to the remaining capacity of the detected battery.

The controller may compare the remaining playback time of the currently playing content with the playback time based on the remaining capacity of the battery at a predetermined period of time.

In addition, the playback apparatus using the scalable video coding may further include a user input unit for setting a priority mode for one of time, space, and image quality scalability, The scalability can be extracted from the table storage unit.

In this case, the priority mode may be a playback mode in which all of the content can be played back, and one of the time, space, and image quality scalability selected by user input is set to the highest level.

According to another aspect of the present invention, there is provided a battery management method comprising the steps of: (a) detecting a remaining battery capacity; (b) calculating a remaining playback time of content selected by a user; (c) Extracting the scalability so that the entire content can be reproduced using the reproduction time, and (d) setting the time, space, and image quality scalability according to the extraction result.

The method includes the steps of: (e) comparing a remaining playback time of the currently playing content with a playable time based on a remaining capacity of the battery at a predetermined period of time; (f) And re-extracting the scalability if the remaining playback time of the content exceeds the playback time due to the remaining capacity of the detected battery.

(C1) receiving a user input for setting a priority mode for one of time, space, and picture quality scalability, and (c2) And extracting the property.

Also, the priority mode may be a playback mode in which any one of the time, space, and picture quality scalability, which is selected by the user's input, is set to the highest level while all of the content can be played back.

At this time, the step (c)

Can be performed by extracting the scalability from the stored table of consumed power according to time, space and image quality scalability.

As described above in detail, according to the playback apparatus and method using scalable video coding according to the present invention, the following effects can be expected.

That is, when the multimedia contents are reproduced by using the portable electronic device, by converting the resolution, the frame number and the SNR value according to the remaining capacity of the battery, There is an advantage that convenience can be increased.

According to the present invention, there is an advantage in that the satisfaction of the user can be improved by providing a high-quality screen for any one of the resolution, the frame number and the SNR value according to the specific mode set by the user.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a playback apparatus using scalable video coding according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a playback apparatus using scalable video coding that constitutes a specific embodiment of the present invention.

As shown in FIG. 1, a playback apparatus using scalable video coding according to a specific embodiment of the present invention includes a capacity detection unit 10.

The capacity detecting section 10 detects the remaining capacity of the battery. This is because the power consumption of the battery is different depending on the time, space and picture quality scalability. That is, the remaining capacity of the battery is detected, and the scalability of the currently reproduced content is converted using the detected remaining capacity to prevent the battery from being exhausted during the reproduction of the content.

The data for reproducing the content is stored in the storage unit 20. That is, the storage unit 20 stores encoded data using Scalable Video Coding (SVC).

Here, the scalable video coding (SVC) is a coding scheme that has a coding efficiency similar to that of H.264, and supports a scalability of time, space, and image quality regions in a complex manner. One scalable bitstream encoded using the scalable video coding is composed of two or more dependent layers.

The scalable stream is composed of one base layer and a plurality of enhancement layers. At this time, information of the base layer and successive upper layers are used together to form a more advanced video bitstream.

A playback apparatus using scalable video coding that constitutes a specific embodiment of the present invention includes a table storage unit 30 for storing power consumption according to time, space and image quality scalability.

The table storage unit 30 measures the power consumption of the battery according to time, space, and image quality scalability through experiments and stores a table summarized in a table. The table storage unit 30 is used for extracting the scalability that enables the entire contents selected by the control unit 40 to be reproduced.

Table 1 is an example of a table in which power consumption according to time, space, and picture quality scalability is summarized.

Identification number Resolution Number of frames SNR Power consumption One 640 × 480 30 30dB 870 mW 2 640 × 480 30 20dB 855 mW 3 640 × 480 30 10dB 840mW 4 640 × 480 15 30dB 740mW 5 640 × 480 15 20dB 720mW 6 640 × 480 15 10dB 695mW 7 480 × 272 30 30dB 760 mW 8 480 × 272 30 20dB 745mW 9 480 × 272 30 10dB 740mW 10 480 × 272 15 30dB 685 mW 11 480 × 272 15 20dB 670 mW 12 480 × 272 15 10dB 640mW 13 400 x 240 30 30dB 755mW 14 400 x 240 30 20dB 740mW 15 400 x 240 30 10dB 720mW 16 400 x 240 15 30dB 595 mW 17 400 x 240 15 20dB 585 mW 18 400 x 240 15 10dB 580mW

As shown in Table 1, the table is configured by experimentally measuring the consumed power of the battery according to the combination of time, space, and image quality scalability. Here, "Resolution" indicates that images having different resolutions are classified hierarchically by up-sampling and down-sampling according to spatial scalability. And "Frame number" indicates that various frame rates are provided by specifying a temporal level distinguished for each frame using a hierarchical B picture technique for temporal scalability. Also, "SNR" indicates providing a bitstream of different image quality, which is implemented by CGS or FGS for image quality scalability.

For example, when the resolution is 640 x 480, the frame number is 15, and the SNR value is 30 dB, the consumed power is 740 mW corresponding to the identification number 4.

The controller 40 extracts the scalability that enables the entire content to be reproduced by the user using the consumed power value provided by the table storage unit 30. That is, the control unit 40 extracts the scalability from the table storage unit 30 so that the entire selected content can be reproduced by using the remaining playback time of the content selected by the user and the remaining capacity of the detected battery do.

Here, all reproduction of the selected content means reproduction until the reproduction of the content selected by the user is terminated. Accordingly, the controller 40 determines whether the remaining capacity of the content can be reproduced with the remaining capacity of the battery, and extracts reproducible scalability from the table storage 30. At this time, the extraction of the scalability from the table storage unit 30 is performed by using the remaining playing time of the content and the remaining capacity of the battery with reference to the consumed power of the battery according to the scalability stored in the table storage unit 30 .

For example, when the remaining capacity of the battery is 740 mWh and the remaining playback time of the content is one hour, referring to the table of Table 1, the optimal scaler capable of reproducing all content within the remaining capacity range of the battery The property corresponds to identification numbers 4, 9, and 14. Therefore, the control unit 40 can extract any one of the identification numbers 4, 9, and 14 from the table.

The controller 40 re-extracts the scalability so that the entire contents can be reproduced if the remaining reproduction time of the currently reproduced contents exceeds the reproducible time due to the remaining capacity of the detected battery. At this time, the controller 40 compares the remaining playback time of the currently playing content with the remaining playback time of the battery at a predetermined time interval. This is to judge whether or not the entire contents currently reproduced can be reproduced at a predetermined period of time, and to reproduce all by re-extracting the scalability when reproduction is impossible in all.

For example, when the remaining capacity of the battery is 900 mWh, the remaining playback time of the content is one hour, and the content is being reproduced by the identification number 1 among the scalability setting values listed in the table of Table 1, 870 mW. At this time, if the remaining capacity of the battery is further reduced to 740 mWh as a result of the occurrence of the interruption, the control unit 40 re-extracts any of the identification numbers 4, 9, and 14 from the table It is possible to prevent the battery from being exhausted during the remaining playback time of the time.

Therefore, according to the playback apparatus using scalable video coding according to the specific embodiment of the present invention, even if additional power consumption occurs due to another interrupt during content playback, the scalability can be re-extracted, There is an advantage that it can reproduce all.

The control unit 40 extracts the scalability from the table storage unit 30 to correspond to the set priority mode through the user input unit 60 to be described later. Here, the priority mode refers to setting priority to any one of time, space, and image quality scalability so as to provide superior scalability in comparison with other scalability. That is, the priority mode refers to a playback mode in which any one of the content, the time, the space, and the picture quality scalability is set to the highest level by the user input.

That is, the user can set a priority to any one of time, space, and picture quality scalability so that a display screen showing excellent characteristics with respect to a specific scalability can be provided within a range where all contents being reproduced can be reproduced.

For example, when the remaining capacity of the battery is 740 mWh and the remaining playback time of the content is one hour, referring to the table of Table 1, the optimal scaler capable of reproducing all content within the remaining capacity range of the battery It can be seen that the property corresponds to the identification numbers 4, 9 and 14. At this time, when the priority mode for setting the spatial scalability to the highest level is set by the user, the controller extracts the scalability of the identification number 4.

Therefore, according to the embodiment of the present invention, it is possible to improve the satisfaction of the user on the display screen by providing a higher scalability for any one of resolution, frame number and SNR value according to the user's selection .

In accordance with the extraction result of the scalability by the controller 40, the reproducing unit 50 converts the time, space, and image quality scalability and reproduces them. The playback unit 50 supports the scalability of the time, space, and image quality regions in order to provide the scalability extracted by the controller 40 from the table storage unit 30. The scalable stream generated by the playback unit 50 is composed of a base layer and a plurality of enhancement layers. The enhancement layer 50 uses the information of the base layer and successive upper layers, Bit stream.

A playback apparatus using scalable video coding according to a specific embodiment of the present invention includes a user input unit 60 for setting a priority mode for any one of time, space and image quality scalability. The controller 40 extracts the scalability corresponding to the priority mode set through the user input unit 60 as described above.

The user can set a priority mode through the user input unit 60. The user can play all of the content according to the setting of the priority mode and can assign priority to any one of time, Can be given.

Hereinafter, a preferred embodiment of a reproducing method using scalable video coding according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a detailed flowchart illustrating a playback method using scalable video coding according to a specific embodiment of the present invention.

As shown in FIG. 2, the playback method using scalable video coding according to a specific embodiment of the present invention starts with the step of detecting the remaining capacity of the battery (S100). The remaining capacity of the battery is detected because the consumed power of the battery is different according to time, space and image quality scalability. That is, the remaining capacity of the battery is detected, and the scalability of the currently reproduced content is converted using the detected remaining capacity to prevent the battery from being exhausted during the reproduction of the content.

Next, a user input for selection of contents to be reproduced is received (S110). The scalability can be changed according to the remaining capacity of the battery by receiving the selection of the content to be played back from the user and calculating the remaining playback time of the content.

Then, the remaining playback time of the content selected by the user is calculated (S120). This is to extract the scalability that can reproduce the remaining playback portion of the content with the remaining capacity of the battery.

Next, the scalability is extracted from the table so that the entire contents can be reproduced (S130). At this time, the extraction of the scalability is performed by selecting the scalability that can reproduce the remainder portion of the content from the table in which the power consumption according to the time, space, and image quality scalability is arranged.

The table is a table summarizing the measured values of battery power consumption according to time, space, and image quality scalability. Table 1 is an example of a table in which power consumption according to time, space, and picture quality scalability is summarized.

Subsequently, time, space, and image quality scalability are converted according to the extraction result (S140). That is, in order to provide the scalability extracted in operation 130, the scalability of the time, space, and image quality regions is supported in a complex manner. At this time, the supported scalable stream is composed of one base layer and a plurality of upper layers. And the improved video bitstream can be provided by using information of the base layer and successive upper layers.

FIG. 3 is a flowchart illustrating a method of reproducing using scalable video coding according to another embodiment of the present invention in detail.

As shown in FIG. 3, the method using scalable video coding according to another embodiment of the present invention starts with a step of detecting a remaining capacity of a battery (S200). Detecting the remaining capacity of the battery is performed to prevent the battery from being consumed during reproduction of the content by converting the scalability of the content currently being reproduced.

Next, a user input for selection of content to be reproduced is received (S120). And receives the selection of the content to be played back from the user, thereby performing scalability conversion using the remaining playback time of the content.

Subsequently, the remaining playback time of the content selected by the user is calculated (S220). The remaining playback time is a time required for playback from the current playback portion of the content selected by the user to the playback end portion of the content.

Next, the scalability is set so that the entire contents can be reproduced (S230). Here, the setting of the scalability means that the scalability of the time, space, and image quality regions is supported in a combined manner so that the entire contents can be reproduced.

Then, the remaining playback time of the content is compared with the remaining playback time of the battery at a predetermined time interval (S240). This is to judge whether or not the entire contents currently reproduced can be reproduced at a predetermined period of time, and to reproduce all by re-extracting the scalability when reproduction is impossible in all.

Next, it is determined whether the remaining playback time of the content exceeds the playback time due to the remaining capacity of the battery (S250). In this case, if the remaining playback time exceeds the playback time, step 260 is performed. On the other hand, if the remaining playback time is less than or equal to the reproducible time, step 240 is performed.

If it is determined in operation 250 that the remaining playback time exceeds the playback time, the scalability is reset to enable full playback of the content in operation S260. This is to judge whether or not the entire contents currently reproduced can be reproduced at a predetermined period of time, and to reproduce all by re-extracting the scalability when reproduction is impossible in all.

Therefore, according to the playback method using scalable video coding according to another embodiment of the present invention, even if additional power consumption occurs due to other interrupts during content playback, the scalability is reset so that all of the content being played back before the battery is consumed There is an advantage that reproduction is possible.

FIG. 4 is a flowchart illustrating a method of playing back scalable video coding according to another embodiment of the present invention. Referring to FIG.

As shown in FIG. 4, the method using scalable video coding according to another embodiment of the present invention starts from the step of detecting the remaining capacity of the battery (S300).

Next, a user input for selection of content to be reproduced is received (S310).

Subsequently, the remaining playback time of the content selected by the user is calculated (S320).

Next, a user input for setting a priority mode for any one of time, space, and picture quality scalability is received (S330).

Here, the priority mode refers to setting priority to any one of time, space, and image quality scalability so as to provide superior scalability in comparison with other scalability. That is, the priority mode refers to a playback mode in which any one of the content, the time, the space, and the picture quality scalability is set to the highest level by the user input.

That is, the user can set a priority to any one of time, space, and picture quality scalability so that a display screen showing excellent characteristics with respect to a specific scalability can be provided within a range where all contents being reproduced can be reproduced.

Then, scalability is set according to the set priority mode (S340). That is, the present invention supports the scalability of the time, space, and image quality regions in order to provide a display screen according to the priority mode set by the user. At this time, the scalable stream is composed of one base layer and a plurality of enhancement layers. And an improved video bitstream is provided by using information of the base layer and consecutive upper layers.

Next, the remaining time of the content is compared with the remaining capacity of the battery to determine whether the remaining time exceeds the available time (S350). At this time, if the remaining playback time exceeds the playback time, step 360 is performed. On the other hand, if the remaining playback time is less than or equal to the playback time, step 350 is performed again.

If it is determined in operation 350 that the remaining playback time exceeds the playback time, the scalability is reset to enable full playback of the content in operation S360. This is because, when additional power consumption occurs, the scalable capacity is reset so that all of the currently playing content can be reproduced before the battery is exhausted.

According to another aspect of the present invention, there is provided a playback method using scalable video coding, wherein a high quality screen is provided for any one of a resolution, a frame number, and an SNR value according to a specific mode set by a user, Can be improved.

It is to be understood that the invention is not limited to the disclosed embodiment, but is capable of many modifications and variations within the scope of the appended claims. It is self-evident.

1 is a block diagram showing a playback apparatus using scalable video coding that constitutes a specific embodiment of the present invention.

FIG. 2 is a flowchart illustrating in detail a playback method using scalable video coding according to a specific embodiment of the present invention. FIG.

3 is a flowchart illustrating a method of playing back scalable video coding according to another embodiment of the present invention.

FIG. 4 is a flowchart illustrating a method of playing back scalable video coding according to another embodiment of the present invention. Referring to FIG.

Description of the Related Art [0002]

10: Capacity detector 20:

30: table storage unit 40: control unit

50: reproduction section 60: user input section

Claims (10)

A capacity detecting unit for detecting a remaining capacity of the battery; A storage unit for storing encoded data using scalable video coding (SVC); A table storage unit for storing consumed power according to time, space and image quality scalability; A control unit for extracting scalability from the table storage unit so that all of the selected contents can be reproduced using the remaining reproduction time of the content selected by the user input and the remaining capacity of the detected battery; A reproducing unit for converting the time, space, and image quality scalability according to the extracted result and reproducing the converted image; And A user input for setting a priority mode for any one of time, space, and picture quality scalability, Wherein the control unit extracts scalability from the table storage unit to correspond to a priority mode set through the user input unit; Wherein the priority mode is a reproduction mode in which all of the content can be reproduced and one of the time, space, and image quality scalability selected by user input is set to the highest level, and the playback mode using the scalable video coding . The method according to claim 1, Wherein, Extracts the scalability if the remaining playback time of the currently playing content exceeds the playback time due to the remaining capacity of the detected battery. 3. The method of claim 2, Wherein, Wherein the remaining playback time of the currently playing content is compared with the remaining playback time of the battery at a predetermined period of time. delete delete (a) detecting a remaining capacity of the battery; (b) calculating a remaining playback time of the content selected by the user input; (c) extracting scalability so that the entire content can be reproduced using the remaining capacity of the battery and the remaining playback time of the content; And (d) setting time, space, and image quality scalability according to the extraction result; (C1) receiving a user input for setting a priority mode for any one of time, space, and image quality scalability; and (c2) Extracting the property; The priority mode is a playback mode in which any one of the time, space, and picture quality scalability, which is selected by user input, is set to the highest level while all contents can be reproduced; Wherein the step (c) is performed by extracting scalability from a table in which power consumption according to time, space, and image quality scalability is summarized. The method according to claim 6, (e) comparing the remaining playback time of the currently playing content with the playback time by the remaining capacity of the battery at a predetermined period of time; (f) re-extracting the scalability if the remaining playback time of the currently playing content exceeds the playback time due to the remaining capacity of the detected battery. Used playback method. delete delete delete

Images