JP2014165796A - Information processing system and information processing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a reproduction state by converting content to be reproduced into content which can be normally projected, even in the case where the reproduction state of the content to be reproduced is not good.SOLUTION: An information processing apparatus comprises means for holding format information of reproducible content beforehand and reproducing the content. It is determined whether or not an image quality is high at the time when content converted by the previously held format information is reproduced, and if not, a content conversion device having the previously held format information is retrieved over a network. If retrieved, reproduced content is transmitted to the content conversion device. The content conversion device receives reproduced content from the information processing apparatus, converts the content into a data structure which is correspondent to the previously held format information and different from that in reproduction, and transmits the content to the information processing apparatus. The information processing apparatus receives the converted content from the content conversion device and reproduces the content.

Description

  The present invention relates to an information processing system and an information processing apparatus.

  Various projection devices have a function of projecting still images and moving images without connecting an information processing apparatus (hereinafter also referred to as “PC”) and the projection device with a cable. There are technologies for transmitting content to a projection device via a network, and technologies for projecting still images and moving images stored in a USB memory by inserting a USB (Universal Serial Bus) memory into the projection device. Projection devices equipped with a technology for projecting still images and moving images stored in a USB memory have already been developed.

  By the way, there are a great many types of moving image formats to be played back by a projection device. Therefore, there is a problem that it is very difficult for one projection apparatus to support all moving image formats. In order to solve this problem, when a projection device does not support the format of a moving image to be played back, a technique for converting the format into a compatible format and playing the moving image is already known.

  Patent document 1 aims at improving the usability for exchanging content between projection apparatuses. That is, it is determined whether or not the format of the content to be projected is supported. And when it determines with not being supported, the technique which detects the other projection apparatus which can convert the format of a content, and performs format conversion in the said other projection apparatus is disclosed.

  However, projection devices such as the above-described conventional projectors have limited CPU (Central Processing Unit) and memory resources compared to PCs. For this reason, there is a problem that even if the format of the moving image to be projected is a format that is compatible with the projection device, it may not be able to be projected normally depending on the data structure of the moving image. Specifically, there have been phenomena such as audio and video being shifted, audio being interrupted, and video being distorted.

  The technique disclosed in Patent Document 1 performs content format conversion. However, even if the format of the moving image to be projected is a format that is compatible with the projection device, the problem that the image may not be normally projected depending on the data configuration of the moving image has not been solved. Specifically, phenomena such as a shift between audio and video, a break in audio, and a disturbance in video still occur.

  Therefore, the present invention has been made in view of the above-described problems of the prior art, and when a content such as a moving image stored in a storage unit is reproduced using a projection device, the content is reproduced by the projection device. An object is to improve the reproduction situation by converting the content into a content that can be reproduced normally even if the reproduction situation of the content is not good.

  In order to solve the above-described problem, an information processing system according to the present invention described in claim 1 includes an information processing device and a content conversion device that converts content into a data structure corresponding to the format information of the content via a network. The information processing system is a connected information processing apparatus, wherein the information processing apparatus reproduces content format information that can be reproduced in advance, means for reproducing the content, and content converted by the format information retained in advance. Means for judging whether the image quality is good or not, and if it is judged that the image quality is bad, means for searching the content conversion apparatus having the format information held in advance via the network; When a content conversion apparatus having the format information held in advance is searched Means for transmitting the reproduced content to the content conversion device, wherein the content conversion device receives the reproduced content from the information processing device, and the reproduced content. And means for converting the data into a data structure different from that at the time of reproduction corresponding to the format information held in advance, and means for transmitting the converted content to the information processing apparatus, The information processing apparatus includes: means for receiving the converted content from the content conversion apparatus; and means for reproducing the received content.

  According to the present invention, it is possible to obtain an information processing system capable of improving a reproduction situation even when the reproduction situation of content reproduced by a projection device is not good.

It is a schematic block diagram which shows the structure of the information processing system which concerns on embodiment of this invention. It is a flowchart figure explaining operation | movement of the information processing system which concerns on embodiment of this invention. It is a state transition diagram explaining the flow of a process of the moving image reproducing apparatus which comprises the information processing system which concerns on embodiment of this invention. It is a figure explaining the reproduction time information between the video signal and the audio signal in the information processing system according to the embodiment of the present invention. It is a figure explaining the case where arrangement | positioning of the data between the video signal and audio | voice signal is largely biased in the information processing system which concerns on embodiment of this invention.

  Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified thru | or abbreviate | omitted suitably.

  The present invention relates to a function for reproducing content in a content reproduction apparatus such as a projection device. That is, when the content reproduction apparatus detects that the content to be reproduced has a data structure that cannot be normally reproduced, the content reproduction device searches for a conversion device that can convert the content via the network. The conversion device converts the content to be played back into a data structure that can be normally played back by the content playback device, and plays back the content on the content playback device. The features of the present invention will be described in detail with reference to the following drawings.

  First, the configuration of an information processing system according to an embodiment of the present invention will be described. FIG. 1 is a schematic block diagram showing a configuration of an information processing system according to an embodiment of the present invention. 1, an information processing system 1 includes a projector 150 that is a content reproduction device that reproduces content, a plurality of PCs 100, 110,... That are content conversion devices that convert content, and a network 10 that connects these, It is composed of

  The PC 100 includes a CPU 102 that controls the overall operation of the PC 100, and a memory 101 that stores a program executed by the CPU 102, a data structure conversion program for content that requires data structure conversion, which will be described later, and the like. The display unit 103 includes an LCD (Liquid Crystal Display) that displays content and the like, and an image processing unit 104 that performs format conversion of the content. Furthermore, it is comprised from the network I / F (Inter / Face) part 105 which exchanges content data etc. between the projectors 150. FIG. This configuration is the same for the other PCs 110.

  The projector 150 has a CPU 152 that controls the overall operation of the projector 150. The memory 151 stores a program executed by the CPU 152 and a program for projecting content including content whose data structure has been converted, which will be described later. The memory 151 also stores format information of content that can be played back by the projector 150, a data structure corresponding to the format information, and the like.

  Further, the projector 150 includes a projection unit 153 that projects content and the like, and an image processing unit 154 that processes an image of the content to be projected. Furthermore, it has the network I / F part 155 which exchanges content data etc. between PC100. Note that the memory 151 includes a memory connected from the outside such as a USB in which content data is stored.

  The projector 150 and the PCs 100, 110,... Are connected by the network 10.

  Next, the operation of the information processing system according to the embodiment of the present invention will be described. FIG. 2 is a flowchart for explaining the operation of the information processing system according to the embodiment of the present invention.

  In FIG. 2, first, in step (hereinafter referred to as “S”) 201, the projector 150 displays a moving image file as one of content data from a storage medium stored in a memory 151 or an external memory such as a USB memory (not shown). Is read.

  In S202, based on the program stored in the memory 151, the image processing unit 154 of the projector 150 starts playing the moving image file read in S201. In S203, based on the program stored in the memory 151, the image processing unit 154 of the projector 150 checks the reproduction status of the moving image file started in S202, and determines whether there is a problem. Specifically, it is determined whether or not the quality of the reproduced image is good, that is, whether or not a phenomenon occurs in which the sound and the video are shifted, the sound is interrupted, the video is disturbed, or the like.

  If it is determined in S203 that there is a problem (S203: there is a problem), the process proceeds to S204. When it is determined that there is no problem (S203: no problem), the process proceeds to S210. In S204, the network I / F unit 155 of the projector 150 searches the PCs 100, 110,... Connected to the network 10 for PCs that are moving image conversion devices on the network. That is, when the projector 150 reproduces a moving image file that is determined to have a problem in reproduction status from the PCs 100, 110,... Connected to the network 10, the image quality is good. Search for PCs that can

  The PC that can improve the image quality is a PC that has the same format information as the format information stored in advance by the projector 150 and can convert the data structure of the moving image file. This operation is performed in the background of the projector 150 simultaneously with the moving image reproduction in S202.

  In S205, it is determined whether or not there is a PC as a moving image conversion device on the network. If it is determined in S205 that there is a motion conversion device (S205: present), the process proceeds to S206. When it is determined that there is no moving image conversion device (S205: None), the process proceeds to S210.

  In S206, the projector 150 transmits a moving image to the moving image converter searched in S204. In step S207, the moving image converter receives the moving image transmitted in step S206 so that the image quality is good when reproduced by the projector 150. Specifically, the moving image file is converted into a data structure that corresponds to the format information held in advance by the projector 150 and that is different from that reproduced by the projector 150.

  In S208, the moving image converter transmits the moving image converted in S207 to the projector 150. In step S209, the projector 150 stores the converted moving image transmitted in step S208 in the memory 151 and ends the process.

  In S210, it is determined whether or not the moving image reproduced in S202 is the end portion. When it is determined that it is not the terminal part (S210: NO), the process proceeds to S202, and when it is determined that it is the terminal part (S210: YES), the process is terminated. In FIG. 2, the moving image content is described as an example of the reproduction target content, but the content to be reproduced is not limited to the moving image content.

  The information processing system according to the embodiment of the present invention starts reproduction of moving image content as content to be reproduced, and as a result, checks the reproduction status. If there is a problem with the reproduced image quality, a content conversion apparatus having the same format information as the format information of the content data is searched. Further, in the content conversion apparatus, the content data is converted into a data structure different from that when it is reproduced by the projector, and the converted moving image content is reproduced.

  Next, the reproduction processing of the moving image content of the projector that is the moving image reproduction processing device constituting the information processing system according to the embodiment of the present invention will be described. FIG. 3 is a state transition diagram for explaining the flow of processing of the video playback device that constitutes the information processing system according to the embodiment of the present invention.

  In FIG. 3, the CPU 152 of the projector 150 performs file reading 31 of content data stored in the memory 151. Then, the CPU 152 performs separation 32 between the audio signal and the video signal.

  The separated video signal is subjected to video signal decoding 33 by the image processing unit 154. On the other hand, the separated audio signal is subjected to audio signal decoding 34 by the image processing unit 154. The decoded video signal is projected 35, and the decoded audio signal is output as an audio signal 36.

  Next, a specific example of the reproduction status check for the reproduced moving image in S203 of FIG. 2 will be described. FIG. 4 is a diagram illustrating reproduction time information between a video signal and an audio signal in the information processing system according to the embodiment of the present invention. FIG. 5 is a diagram for explaining a case where the data arrangement between the video signal and the audio signal is largely biased in the information processing system according to the embodiment of the present invention.

  In the moving image content, reproduction time information (PTS: Presentation Time Stamp) is added to each of the video signal and the audio signal. If the moving image content is reproduced and output according to the reproduction time information, there is no deviation between the video signal and the audio signal. Therefore, the first method for checking the reproduction status is that the PTS of the video signal at the time of projection 35 and the PTS of the audio signal at the time of audio signal output 36 shown in FIG. 3 deviate by exceeding a predetermined threshold. Determine whether or not. If the difference between the two exceeds the threshold, it is determined that there is a problem in the reproduction status (FIG. 2: S203: problem).

  The second reproduction status check method is performed at the time of separation 32 of the audio signal and the video signal shown in FIG. That is, as shown in FIG. 4, when the difference time between the PTS of the adjacent video signal and the PTS of the audio signal exceeds a predetermined threshold, there is a problem in the reproduction status (FIG. 2: S203: It is determined that there is a problem.

  The third check method of the reproduction status is a method used when the data arrangement of the video signal and the audio signal is largely biased as shown in FIG. For example, among video data for 1.5 seconds, video frames exist for x seconds with respect to audio data for 1.5 seconds from the beginning of the data. Then, in the remaining (1.5-x) seconds, the arrangement of data within a predetermined time such that there is no audio data and only a video frame exists, and the video signal and the audio signal are arranged. This is the case when it is largely biased. In other words, this is a case where the balance between the ratio of the video signal and the ratio of the audio signal is broken.

  Note that the reproduction output check method can be considered in various patterns depending on the video format, so the first, second, and third check methods described above are merely examples.

  Further, as an example of means for searching for a device capable of format conversion, a means similar to searching for a projector that can be projected by a conventional network utility can be considered. Since this is a known technique, a detailed description thereof is omitted here.

  Furthermore, a specific example of the content reproduction apparatus includes a projector, and a specific example of the content conversion apparatus includes a server, an ITBox, and the like in addition to the PC described above.

  A means for confirming whether or not the playback status has been improved after the content has been converted can be realized by checking the playback status again.

  Each operation of the information processing system in the embodiment of the present invention shown in FIG. 2 can be realized by a program on a computer. The CPU 152 of the projector 150 and the CPUs 102, 112, ... of the PCs 100, 110, ... load the programs stored in the memories 151, 101, 111, .... Then, each processing step of the program is performed sequentially.

  As described above, according to the present invention, when it is detected that the content cannot be normally reproduced in the projection device, a content conversion device capable of converting the data structure of the content via the network is searched. To do. In the content conversion apparatus, the projection device converts the data into data that can be normally reproduced. As a result, an information processing system and an information processing apparatus that can improve the playback situation when the playback image quality of the content being played back on the projection device is not good can be obtained.

  The present invention has been described above by the preferred embodiments of the present invention. While the invention has been described with reference to specific embodiments thereof, various modifications and changes can be made to these embodiments without departing from the broader spirit and scope of the invention as defined in the claims. is there.

DESCRIPTION OF SYMBOLS 1 Information processing system 10 Network network 100, 110 Information processing apparatus (PC)
101, 111, 151 Memory 102, 112, 152 CPU
103, 113 Display unit 104, 114, 154 Image processing unit 105, 115, 155 Network I / F unit 150 Projector 153 Projection unit

JP 2010-049525 A

Claims (8)

An information processing system in which an information processing device and a content conversion device that converts content into a data structure corresponding to the format information of the content are connected via a network,
The information processing apparatus includes:
Means for preliminarily storing format information of reproducible content;
Means for playing content,
Means for judging whether the image quality when the content converted by the format information held in advance is reproduced;
If it is determined that the image quality is negative, means for searching for a content conversion device having the format information held in advance via the network;
Means for transmitting the reproduced content to the content conversion device when a content conversion device having the format information held in advance is searched;
Including
The content conversion device includes:
Means for receiving the reproduced content from the information processing apparatus;
Means for converting the reproduced content into a data structure corresponding to the format information held in advance and different from the reproduced content;
Means for transmitting the converted content to the information processing apparatus;
Including
The information processing apparatus includes:
Means for receiving the converted content from the content conversion device;
Means for reproducing the received content;
An information processing system comprising:   The difference between the reproduction time information when the reproduced content video signal is projected and the reproduction time information when the reproduced content audio signal is output exceeds a predetermined threshold. 2. The information processing system according to claim 1, wherein the image quality is determined to be negative.   When the difference between the reproduction time information of the video signal and the reproduction time information of the audio signal when the video signal and audio signal of the reproduced content are separated exceeds a predetermined threshold The information processing system according to claim 1, wherein the image quality is determined to be negative.   2. The image quality according to claim 1, wherein when the proportion of the video signal and the proportion of the audio signal occupying the reproduced content within a predetermined time is out of balance, it is determined that the image quality is negative. Information processing system. An information processing device connected via a network to a content conversion device that converts content into a data structure corresponding to the format information of the content,
Means for preliminarily storing format information of reproducible content;
Means for playing content,
Means for determining whether the image quality when the content converted by the format information held in advance is reproduced;
If it is determined that the image quality is negative, means for searching for a content conversion device having the format information held in advance via the network;
Means for transmitting the reproduced content to the content conversion device when a content conversion device having the format information held in advance is searched;
Means for receiving, from the content conversion device, the reproduced content corresponding to the format information held in advance and converted into a data structure different from the reproduced content;
Means for reproducing the received content;
An information processing apparatus comprising:   The difference between the reproduction time information when the reproduced content video signal is projected and the reproduction time information when the reproduced content audio signal is output exceeds a predetermined threshold. The information processing apparatus according to claim 5, wherein the image quality is determined to be negative.   When the difference between the reproduction time information of the video signal and the reproduction time information of the audio signal when the video signal and audio signal of the reproduced content are separated exceeds a predetermined threshold The information processing apparatus according to claim 5, wherein the image quality is determined to be negative.   6. The image quality according to claim 5, wherein when the proportion of the video signal occupying the reproduced content within a predetermined time and the proportion of the audio signal are out of balance, it is determined that the image quality is negative. Information processing device.

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