Abstract:
For displaying a source presentation with accompanying timed responses and comments, a synchronization module synchronizes client time codes with a host time code as a medium module records responses and comments on the source presentation.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is a continuation-in-part that claims priority to U.S. patent application Ser. No. 14/315,176 entitle “PRESENTING A SOURCE MEDIUM” and filed on Jun. 25, 2014 for Dallin M. Scherbell, which is incorporated herein by reference, which claims priority to U.S. Provisional Patent Application No. 61/841,050 entitled “PRESENTING A SOURCE MEDIUM” and filed on Jun. 28, 2013 for Dallin Scherbell, which is incorporated herein by reference. 
     
    
     BACKGROUND 
       [0002]    Field 
         [0003]    The subject matter disclosed herein relates synchronizing a source, response, and comment presentation. 
         [0004]    Description of the Related Art 
         [0005]    A response and/or comment may be recorded to accompany a source presentation such as a language instruction presentation. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0006]    In order that the advantages of the embodiments of the invention will be readily understood, a more particular description of the embodiments briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only some embodiments and are not therefore to be considered to be limiting of scope, the embodiments will be described and explained with additional specificity and detail through the use of the accompanying drawings, in which: 
           [0007]      FIG. 1  is a schematic block diagram illustrating one embodiment of a presentation system; 
           [0008]      FIG. 2A  is a schematic block diagram illustrating one embodiment of a response medium; 
           [0009]      FIG. 2B  is a schematic block diagram illustrating one embodiment of a command record; 
           [0010]      FIG. 2C  is a schematic block diagram illustrating one embodiment of a comment medium; 
           [0011]      FIG. 2D  is a schematic block diagram illustrating one embodiment of a source medium; 
           [0012]      FIG. 3A  is a schematic block diagram illustrating one embodiment of a computer; 
           [0013]      FIG. 3B  is a schematic block diagram illustrating one embodiment of a presentation apparatus; 
           [0014]      FIG. 4A  is a schematic flow chart diagram illustrating one embodiment of a recording method; 
           [0015]      FIG. 4B  is a schematic flow chart diagram illustrating one embodiment of a synchronization method; 
           [0016]      FIG. 5A  is a schematic block diagram illustrating one embodiment of communicating a host time code; 
           [0017]      FIG. 5B  is a schematic block diagram illustrating one alternate embodiment of communicating a host time code; 
           [0018]      FIG. 5C  is a schematic block diagram illustrating one alternate embodiment of communicating a host time code; 
           [0019]      FIG. 5D  is a schematic block diagram illustrating one embodiment of controlling a presentation of a source presentation; 
           [0020]      FIG. 5E  is a schematic block diagram illustrating one embodiment of a command record; 
           [0021]      FIG. 5F  is a schematic block diagram illustrating one embodiment of presenting a source presentation and a recorded response; 
           [0022]      FIG. 5G  is a schematic block diagram illustrating one alternate embodiment of presenting a source presentation and a recorded response; and 
           [0023]      FIG. 5H  is a schematic block diagram illustrating one alternate embodiment of presenting a source presentation and a comment response. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0024]    Reference throughout this specification to “one embodiment,” “an embodiment,” or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases “in one embodiment,” “in an embodiment,” and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment, but mean “one or more but not all embodiments” unless expressly specified otherwise. The terms “including,” “comprising,” “having,” and variations thereof mean “including but not limited to” unless expressly specified otherwise. An enumerated listing of items does not imply that any or all the items are mutually exclusive and/or mutually inclusive, unless expressly specified otherwise. The terms “a,” “an,” and “the” also refer to “one or more” unless expressly specified otherwise. 
         [0025]    Furthermore, the described features, advantages, and characteristics of the embodiments may be combined in any suitable manner. One skilled in the relevant art will recognize that the embodiments may be practiced without one or more of the specific features or advantages of a particular embodiment. In other instances, additional features and advantages may be recognized in certain embodiments that may not be present in all embodiments. 
         [0026]    These features and advantages of the embodiments will become more fully apparent from the following description and appended claims, or may be learned by the practice of embodiments as set forth hereinafter. As will be appreciated by one skilled in the art, aspects of the present invention may be embodied as a system, method, and/or computer program product. Accordingly, aspects of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, micro-code, etc.) or an embodiment combining software and hardware aspects that may all generally be referred to herein as a “circuit,” “module,” or “system.” Furthermore, aspects of the present invention may take the form of a computer program product embodied in one or more non-transitory computer readable medium(s) having computer readable program code embodied thereon. 
         [0027]    Many of the functional units described in this specification have been labeled as modules, in order to more particularly emphasize their implementation independence. For example, a module may be implemented as a hardware circuit comprising custom VLSI circuits or gate arrays, off-the-shelf semiconductors such as logic chips, transistors, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like. 
         [0028]    Modules may also be implemented in software for execution by various types of processors. An identified module of computer readable program code may, for instance, comprise one or more physical or logical blocks of computer instructions which may, for instance, be organized as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may comprise disparate instructions stored in different locations which, when joined logically together, comprise the module and achieve the stated purpose for the module. 
         [0029]    Indeed, a module of computer readable program code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Similarly, operational data may be identified and illustrated herein within modules, and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different storage devices, and may exist, at least partially, merely as electronic signals on a system or network. Where a module or portions of a module are implemented in software, the computer readable program code may be stored and/or propagated on in one or more computer readable medium(s). 
         [0030]    The computer readable medium may be a tangible computer readable storage medium storing the computer readable program code. The computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, holographic, micromechanical, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. 
         [0031]    More specific examples of the computer readable storage medium may include but are not limited to a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), a portable compact disc read-only memory (CD-ROM), a digital versatile disc (DVD), an optical storage device, a magnetic storage device, a holographic storage medium, a micromechanical storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, and/or store computer readable program code for use by and/or in connection with an instruction execution system, apparatus, or device. 
         [0032]    Computer readable program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Python, Ruby, Java, Smalltalk, C++, PHP or the like and conventional procedural programming languages, such as the “C” programming language or similar programming languages. The computer readable program code may execute entirely on the user&#39;s computer, partly on the user&#39;s computer, as a stand-alone software package, partly on the user&#39;s computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user&#39;s computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider). 
         [0033]    The computer program product may be shared, simultaneously serving multiple customers in a flexible, automated fashion. The computer program product may be standardized, requiring little customization and scalable, providing capacity on demand in a pay-as-you-go model. 
         [0034]    The computer program product may be stored on a shared file system accessible from one or more servers. The computer program product may be executed via transactions that contain data and server processing requests that use Central Processor Unit (CPU) units on the accessed server. CPU units may be units of time such as minutes, seconds, hours on the central processor of the server. Additionally, the accessed server may make requests of other servers that require CPU units. CPU units are an example that represents but one measurement of use. Other measurements of use include but are not limited to network bandwidth, memory usage, storage usage, packet transfers, complete transactions etc. 
         [0035]    When multiple customers use the same computer program product via shared execution, transactions are differentiated by the parameters included in the transactions that identify the unique customer and the type of service for that customer. All the CPU units and other measurements of use that are used for the services for each customer are recorded. When the number of transactions to any one server reaches a number that begins to affect the performance of that server, other servers are accessed to increase the capacity and to share the workload. Likewise, when other measurements of use such as network bandwidth, memory usage, storage usage, etc. approach a capacity so as to affect performance, additional network bandwidth, memory usage, storage etc. are added to share the workload. 
         [0036]    The measurements of use used for each service and customer are sent to a collecting server that sums the measurements of use for each customer for each service that was processed anywhere in the network of servers that provide the shared execution of the computer program product. The summed measurements of use units are periodically multiplied by unit costs and the resulting total computer program product service costs are alternatively sent to the customer and or indicated on a web site accessed by the customer which then remits payment to the service provider. 
         [0037]    In one embodiment, the service provider requests payment directly from a customer account at a banking or financial institution. In another embodiment, if the service provider is also a customer of the customer that uses the computer program product, the payment owed to the service provider is reconciled to the payment owed by the service provider to minimize the transfer of payments. 
         [0038]    The computer program product may be integrated into a client, server and network environment by providing for the computer program product to coexist with applications, operating systems and network operating systems software and then installing the computer program product on the clients and servers in the environment where the computer program product will function. 
         [0039]    In one embodiment software is identified on the clients and servers including the network operating system where the computer program product will be deployed that are required by the computer program product or that work in conjunction with the computer program product. This includes the network operating system that is software that enhances a basic operating system by adding networking features. 
         [0040]    In one embodiment, software applications and version numbers are identified and compared to the list of software applications and version numbers that have been tested to work with the computer program product. Those software applications that are missing or that do not match the correct version will be upgraded with the correct version numbers. Program instructions that pass parameters from the computer program product to the software applications will be checked to ensure the parameter lists match the parameter lists required by the computer program product. Conversely parameters passed by the software applications to the computer program product will be checked to ensure the parameters match the parameters required by the computer program product. The client and server operating systems including the network operating systems will be identified and compared to the list of operating systems, version numbers and network software that have been tested to work with the computer program product. Those operating systems, version numbers and network software that do not match the list of tested operating systems and version numbers will be upgraded on the clients and servers to the required level. 
         [0041]    In response to determining that the software where the computer program product is to be deployed, is at the correct version level that has been tested to work with the computer program product, the integration is completed by installing the computer program product on the clients and servers. 
         [0042]    Furthermore, the described features, structures, or characteristics of the embodiments may be combined in any suitable manner. In the following description, numerous specific details are provided, such as examples of programming, software modules, user selections, network transactions, database queries, database structures, hardware modules, hardware circuits, hardware chips, etc., to provide a thorough understanding of embodiments. One skilled in the relevant art will recognize, however, that embodiments may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of an embodiment. 
         [0043]    Aspects of the embodiments are described below with reference to schematic flowchart diagrams and/or schematic block diagrams of methods, apparatuses, systems, and computer program products according to embodiments of the invention. It will be understood that each block of the schematic flowchart diagrams and/or schematic block diagrams, and combinations of blocks in the schematic flowchart diagrams and/or schematic block diagrams, can be implemented by computer readable program code. The computer readable program code may be provided to a processor of a general-purpose computer, special purpose computer, sequencer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the schematic flowchart diagrams and/or schematic block diagrams block or blocks. 
         [0044]    The computer readable program code may also be stored in a computer readable medium that can direct a computer, other programmable data processing apparatus, or other devices to function in a particular manner, such that the instructions stored in the computer readable medium produce an article of manufacture including instructions which implement the function/act specified in the schematic flowchart diagrams and/or schematic block diagrams block or blocks. 
         [0045]    The computer readable program code may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the program code which executed on the computer or other programmable apparatus provide processes for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. 
         [0046]    The schematic flowchart diagrams and/or schematic block diagrams in the Figures illustrate the architecture, functionality, and operation of possible implementations of apparatuses, systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the schematic flowchart diagrams and/or schematic block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions of the program code for implementing the specified logical function(s). 
         [0047]    It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the Figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. Other steps and methods may be conceived that are equivalent in function, logic, or effect to one or more blocks, or portions thereof, of the illustrated Figures. 
         [0048]    Although various arrow types and line types may be employed in the flowchart and/or block diagrams, they are understood not to limit the scope of the corresponding embodiments. Indeed, some arrows or other connectors may be used to indicate only the logical flow of the depicted embodiment. For instance, an arrow may indicate a waiting or monitoring period of unspecified duration between enumerated steps of the depicted embodiment. It will also be noted that each block of the block diagrams and/or flowchart diagrams, and combinations of blocks in the block diagrams and/or flowchart diagrams, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer readable program code. 
         [0049]    The description of elements in each figure may refer to elements of proceeding figures. Like numbers refer to like elements in all figures, including alternate embodiments of like elements. 
         [0050]      FIG. 1  is a schematic block diagram illustrating one embodiment of a presentation system  100 . The system  100  includes a host  105  and one or more clients  115 . The host  105  and the clients  115  are in communication through a network  110 . The network  110  may be the Internet, a wide-area network, a local area network, a Wi-Fi network, a mobile telephone network, an ad hoc network, or combinations thereof. 
         [0051]    The host  105  may present a source presentation stored on a source medium  215  to one or more clients  115 . In one embodiment, the source presentation is streamed over the network  110 . Alternatively, a copy of the source presentation may be copied to the one or more clients  115 . In a certain embodiment, the source presentation is presented in a browser. The source presentation may be a video. Alternatively, the source presentation may be an audio message. In addition, the source presentation may be one or more of a live presentation, text, a document, and an illustration. In one embodiment, the source presentation comprises language instruction. In a certain embodiment, the source presentation is a live presentation in video, audio, text, illustration, a document or combinations thereof. 
         [0052]    During the presentation of the source presentation, the client  115  may control the presentation of the source presentation with one or more commands. The commands may be issued at the client  115 . In one embodiment, the commands are issued in response to user activating a control. For example, the user may activate one or more of a pause control, a play control, a reverse control, and/or a fast-forward control. 
         [0053]    For example, a user at a client  115  may view a language instruction source presentation. During the source presentation, the user may be requested to respond to the source presentation. For example, the user may be requested to answer question and/or to make a statement in a target language. 
         [0054]    The client  115  may record one or more responses and/or comments to the source presentation. The response may be recorded to one or more response medium  225 . The response may be expected subsequent to a portion of the source presentation. In one embodiment, the one or more response medium  225  resides on the client  115 . Alternatively, the one or more response medium  225  resides in the host  105 . The recorded response may be a video. The recorded response may also be audio, text, a document, an illustration, or the like. The document may be a Portable Document Format (PDF) document, a word processor document, a presentation document, a spreadsheet document, or the like. The illustration may be a still image, a drawn image, and/or a still image. In one embodiment, the recorded response may be a combination of one or more of a video, audio, text, document, and illustration. 
         [0055]    One or more recorded response on the response medium  225  may be later played back along with the source presentation. The user at a client  115  may view and/or listen to the recorded response and the source presentation. In addition, other users at other clients  115  may also receive to the recorded response with the source presentation. The other users may record comments on the comment medium  270 . The comments may be video, audio, text, a document, an illustration, or combinations thereof. 
         [0056]    In one embodiment, the source presentation along with the comment response and/or recorded response from the comment medium  270  and/or the response medium  225  may be played back together. The presentation of the source presentation with the comment response and/or recorded response is more effective and useful if the comments and/or recorded response are properly synchronized with the source presentation. 
         [0057]    The host  105  includes a host time code  205 . In one embodiment, the host time code  205  is an absolute time. Alternatively, the host time code  205  may indicate time elapsed from an event such as a beginning of the presentation of the source presentation. The host time code  205  may be generated by a clock. In addition, each client includes a client time code  210 . The client time code  210  may be an absolute time. Alternatively, the client time code  210  may indicate a time elapsed from an event such as the beginning of the source presentation and/or the beginning of a response. The client time code  210  may be generated by a clock. 
         [0058]    A command record  230  is also shown. The command record  230  may reside on the host  105 , the client  115 , or combinations thereof. The comment medium  270  may also reside on the host  105 , the client  115 , and combinations thereof. The command record  230  and the comment medium  270  will be described in more detail hereafter. 
         [0059]    In the past, when the source presentation and the recorded response are later presented together, the recorded response could be out of synchronization with the source presentation because the commands controlling the presentation of the source presentation are not incorporated in the presentation. For example, a user may pause the presentation of the source presentation while recording a response, so that the recorded response is relevant to the instant when the presentation was paused, and not a longer time interval equal to a length of the recorded response. 
         [0060]    In addition, the recorded response may be out of synchronization with the source presentation because of differences between the host time code  205  and the client time code  210 . For example, a clock generating the client time code  210  used with recording the recorded response and/or comment response may steadily lose time or gain time. In addition, a clock generating the host time code  205  used when presenting the source presentation may also steadily lose or gain time. As a result, the client time code  210  may diverge from the host time code  205  over the presentation of the source presentation. Therefore, time codes of the recorded response may be out of synchronization with the time codes of the source presentation. When the recorded response is played back along with the source presentation, the recorded response may be out of synchronization with the source presentation. 
         [0061]    When the recorded response is played back with the source presentation and the comment responses, the comment responses may be out of synchronization with the source presentation because of the differences between the host time code  205  and the client time code  210 . As a result, time codes of the comment response may be out of synchronization with the time codes of the source presentation so that when the comment response is played back along with the source presentation and/or the recorded response, the comments will be out of synchronization with the source presentation. 
         [0062]    The embodiments described herein present the source presentation modified by the commands and concurrently present the recorded response synchronized to the host time code. In addition, the embodiments synchronize the host time code  205  with the client time code  210 . As a result, the recorded response and/or the comment response may be presented along with the source presentation with the same temporal relationships as originally recorded at the clients  115 . 
         [0063]      FIG. 2A  is a schematic block diagram illustrating one embodiment of a response medium  225 . The response medium  225  may be a semiconductor memory, a hard disk drive, an optical storage device, a micromechanical storage device, or combinations thereof. The recorded response  235  may be recorded to the response medium  225 . The recorded response  235  includes a response signal  240  and a response time code  245 . 
         [0064]    The response signal  240  may be a digital signal, an analog signal, or combinations thereof. The response signal  240  may record video, audio, text, a document, an illustration, or combinations thereof. The response time code  245  may indicate when portions of the response signal  240  are recorded. In one embodiment, each discrete portion of the response signal  240  includes a response time code  245 . Alternatively, the response time code  245  may indicate a time selected portions of the response signal  240  are recorded. For example, the response time code  245  may demark a beginning of the response signal  240 . 
         [0065]    In one embodiment, the response time code  245  is recorded from the client time code  210 . The client time code  210  may be synchronized to the host time code  205  and thus synchronize the response time code  245  to the host time code  205  as will be described thereafter. Alternatively, the response time code  245  may be recorded directly from the host time code  205 . 
         [0066]      FIG. 2B  is a schematic block diagram illustrating one embodiment of the command record  230 . The command record  230  may be stored on a memory such as a semiconductor memory, a hard disk drive, an optical storage device, a micromechanical storage device, or combinations thereof. The command record  230  may record the commands controlling the presentation of the source presentation at the client  115 . The command record  230  may reside on the client  115 . Alternatively, the command record  230  may reside on the host  105 . 
         [0067]    The command record  230  includes a command  250  and a command time code  255 . The command  250  may be a play command, a pause command, the stop command, a reverse command, a fast-forward command, or the like. The command time code  255  may record a time code corresponding to the source presentation at the execution of the command  250 . The command time code  255  may be recorded from the host time code  205  and thus synchronized to the host time code  205 . Alternatively, the command time code  255  may be recorded from the client time code  210 , with the client time code  210  synchronized to the host time code  205 . Thus, the command time code  255  is also synchronized to the host time code  205 . 
         [0068]      FIG. 2C  is a schematic block diagram illustrating one embodiment of the comment medium  270 . The comment medium  270  may be a semiconductor memory, a hard disk drive, an optical storage device, a micromechanical storage device, or combinations thereof. The comment medium  270  records a comment response  260 . In one embodiment, the comment response  260  is not expected from the user but may be offered. The comment  260  includes a comment signal  263  and a comment time code  265 . In one embodiment, the comment  260  may be created at a second client  115   b . For example, an observer may view a presentation of the source presentation and the recorded response  235  and create the comment  260  in response to both the source presentation and the recorded response  235 . The comment response  260  may be a video, audio, text, a document, an illustration, or combinations thereof. 
         [0069]    The comment time code  265  may be recorded with the comment signal  263 . In one embodiment, the comment time code  265  is synchronized to the host time code  205 . The comment time code  265  may be recorded directly from the host time code  205 . Alternatively, the comment time code  265  may be recorded from a client time code  210 , with the client time code  210  synchronized to the host time code  205 . 
         [0070]      FIG. 2D  is a schematic block diagram illustrating one embodiment of the source medium  215 . The source medium  215  may be a semiconductor memory, a hard disk drive, an optical storage device, a micromechanical storage device, or combinations thereof. The source medium  215  stores the source presentation  275 . The source presentation  275  may be organized as a presentation signal  280  with one or more presentation time codes  285 . The presentation time codes  285  may be explicitly recorded as part of the source presentation  275 . For example, presentation time codes  285  may regularly be embedded as part of the presentation signal  280 . Alternatively, the presentation time codes  285  may be an implicit part of the source presentation  275 . 
         [0071]      FIG. 3A  is a schematic block diagram illustrating one embodiment of a computer  300 . The computer  300  may be embodied in the host  105 , the client  115 , or combinations thereof. The computer  300  includes a processor  305 , a memory  310 , and communication hardware  315 . The memory  310  may be a computer readable storage medium such as a semiconductor storage device, a hard disk drive, an optical storage device a micromechanical storage device, or combinations thereof. The memory  310  may store program code. The processor  305  may execute the program code. The communication hardware  315  may communicate with other devices. 
         [0072]    In one embodiment, the memory  310  embodies one or more of the source medium  215 , the content medium  270 , the command record  230 , and/or the response medium  225 . 
         [0073]      FIG. 3B  is a schematic block diagram illustrating one embodiment of a presentation apparatus  350 . The apparatus  350  may be embodied in the computer  300 . In the depicted embodiment, the apparatus  350  includes a synchronization module  355  and a medium module  360 . The synchronization module  355  and the medium module  360  may be embodied in a computer readable storage medium such as the memory  310 . The computer readable storage media may store program code executable by the processor  305  perform the functions of the synchronization module  355  and the medium module  360 . 
         [0074]    The synchronization module  355  may synchronize the client time code  210  with the host time code  205 . The medium module  360  may record a response to the presentation of the source presentation  275  at the client  115 , with the recorded response  235  synchronized to the host time code  205 . The apparatus  350  may also include a synchronization policy  365  as will be described hereafter. 
         [0075]      FIG. 4A  is a schematic flow chart diagram illustrating one embodiment of a recording method  500 . The method  500  may be performed by the processor  305 . Alternatively, the method  500  may be performed by a computer readable storage medium such as the memory  310 . The computer readable storage medium may store program code. The program code may be executed by the processor  305  to perform the functions of the method  500 . 
         [0076]    The method  500  starts and the synchronization module  355  may synchronize  503  the client time code  210  with the host time code  205 . The synchronization  503  of the client time code  210  with the host time code  205  is described in more detail in  FIG. 4B . 
         [0077]    The medium module  360  may control  505  presentation of the source presentation  275  from the host  105  in response to at least one command at the client  115 . For example, a user may initiate a play command  250   a  at the client  115  to begin presentation of the source presentation  275 . In addition, the user may initiate a pause command at the client  115  to pause presentation of the source presentation  275 . In one embodiment, the presentation of the source presentation  275  as modified by the at least one command is synchronized to the host time code  205 . 
         [0078]    The medium module  360  further records  510  the recorded response  235  to the presentation of the source presentation  275  at the client  115 . For example, the source presentation  275  may be language instruction and the recorded response  235  may be a language exercise directed the language instruction, such as an answer to a question in the language instruction, or the like. 
         [0079]    In one embodiment, the response signal  240  is recorded with one or more response time codes  245 . The response time codes  245  may be recorded from the host time code  205  received at the client  115 . Thus, the recording of the recorded response  235  at the client  115  is directly synchronized to the host time code  205 . Alternatively, the response time codes  245  may be recorded from the client time code  210  after the client time code  210  is synchronized with the host time code  205 . 
         [0080]    In one embodiment, a single response time code  245  indicates one of the start of the response signal  240 , an end of the response signal  240 , or a specified location within the response signal  240  such as 10 milliseconds into the response signal  240 . Alternatively, to response time codes  245  may indicate the start and the end of the response signal  240  respectively. In a certain embodiment, one or more response time codes  245  are distributed throughout the response signal  240 . The one or more response time codes  245  may be distributed regularly throughout the response signal  240 . 
         [0081]    The response may be recorded  510  as the recorded response  235  on the response medium  225 . In one embodiment, the recorded response  235  is recorded on a response medium  225  on the client  115  and copied to a response medium  225  on the host  105 . 
         [0082]    The medium module  360  may record  515  at least one command  250  synchronized to the host time code  205 . In one embodiment, the host time code  205  is used to record the command time code  255 . Alternatively, the client time code  210  synchronized to the host time code  205  is used to record the command time code  255 . The command  250  and the command time code  255  may be recorded as an entry in the command record  230  as will be shown hereafter in  FIG. 5E . 
         [0083]    The method  500  may present  520  the source presentation  275  modified by the at least one command  250  and concurrently present  520  the recorded response  235 . For example, the source presentation  275  may be paused by a pause command  250  at a time indicated by the command time code  255 . In addition, the method  500  may present the recorded response  235  and then play the source presentation  275  as described hereafter in  FIG. 5F . 
         [0084]    Alternatively, a language instruction source presentation  275  may be presented  520  and paused at a same time during the presentation as when a first user original paused the presentation to record the recorded response  235 . The recorded response  235  may be concurrently presented  520  with the paused source presentation  275  and then the source presentation played as shown in  FIG. 5G . Thus, the source presentation  275  and recorded response  235  are presented as originally recorded, without changes due to time codes from unsynchronized sources. 
         [0085]    The method  500  may present  520  the source presentation  275  modified by the at least one command  250  and concurrently present  520  the recorded response  235  via one or more clients  115 . The one or more clients  115  may include a client  115  that recorded  510  the recorded response  235 . Alternatively, the one or more clients  115  may not include the client  115  that recorded  510  the recorded response  235 . 
         [0086]    The method  500  may record  525  a comment response  260 . The comment response  260  may be recorded  525  during the presentation  520  of the source presentation  275  and the recorded response  235  as described in step  520 . The comment response  260  may be synchronized to the host time code  205 . In one embodiment, the comment time code  265  is recorded directly from the host time code  205 . Alternatively, the comment time code  265  is recorded from a client time code  210 , with the client time code  210  synchronized to the host time code  205 . 
         [0087]    The comment response  260  may be a response to the presentation of the source presentation  275  and the concurrent presentation of the recorded response  235 . For example, a second user may view the presentation of the source presentation  275  and the recorded response  235  and record  525  the comment response  260 . 
         [0088]    The method  500  may further concurrently present  530  the comment  260  with at least one of the presentation of the source presentation  275  and the presentation of the recorded response  235  and the method  500  ends. The presentation  530  of the comment  260  may be synchronized with the host time code  205 . Thus, the user that originally recorded the recorded response  235  may view the presentation of the source presentation  275 , the recorded response  235 , and all comment responses  260 , with each synchronized to the host time code  205 . 
         [0089]      FIG. 4B  is a schematic flow chart diagram illustrating one embodiment of a recording method  550 . The method  550  may be performed by the processor  305 . Alternatively, the method  550  may be performed by a computer readable storage medium such as the memory  310 . The computer readable storage medium may store program code. The program code may be executed by the processor  305  to perform the functions of the method  550 . 
         [0090]    The method  550  starts, and in one embodiment, the synchronization module  355  adjusts  555  a synchronization policy  365 . The synchronization policy  365  may be stored in the memory  310 . The synchronization policy may specify when and how the host time code  205  is communicated to the client  115  to update the client time code  210 . 
         [0091]    In one embodiment, the synchronization policy  365  specifies that the host time code  205  is embedded in the source presentation  275  as will be described hereafter in  FIG. 5A . Alternatively, the synchronization policy may specify that the host time code  205  is communicated to the client  115  separately from the source presentation  275  as will be described hereafter in  FIG. 5B . In one embodiment, the synchronization policy specifies at the host time code  205  is communicated to the client  115  in response to a time code request as will be described hereafter in  FIG. 5C . 
         [0092]    The synchronization module  355  may adjust  555  the synchronization policy  365  in response to a communication delay between the host  105  and the client  115 . For example, the synchronization policy may specify more frequent synchronization of the client time code  210  to the host time code  205  as a function of the communication delay as illustrated in Equation 1, where SD is a synchronization time interval between synchronizations, CD is the communication delay, k1 is a nonzero constant. 
         [0000]        SD=k*CD   Equation 1
 
         [0093]    Alternatively, the synchronization policy  365  may specify that the client time code  210  be synchronized to the host time code  205  in response to a time code request. 
         [0094]    In one embodiment, the synchronization policy may specify that the host time code  205  is embedded in the source presentation  275 . In an alternative embodiment, the synchronization policy may specify the host time code  205  is communicated separately from the source presentation  275 . In one embodiment, the synchronization policy may specify a separate communication port to receive the host time code  205 . 
         [0095]    The synchronization module  355  may further determine  560  if the synchronization policy  365  is satisfied. In one embodiment, the synchronization policy  365  is satisfied after the expiration of the synchronization time interval. In addition, the synchronization policy may be satisfied in response to receiving the time code request. If the synchronization policy  365  is not satisfied, the synchronization module  355  continues to adjust  555  the synchronization policy  365 . 
         [0096]    If the synchronization policy  365  is satisfied, the synchronization module  355  may communicate  565  the host time code  205  from the host  105  to the client  115 . The synchronization module  355  may further update  570  the client time code  210  with the host time code  205 . In one embodiment, the synchronization module  355  adds the communication delay to the host time code  205  to generate the client time code  210 . The method  550  may loop to adjust  555  the synchronization policy. 
         [0097]    In one embodiment, the communication delay is added to the host time code  205  at the client  115  to generate the client time code  210 . The communication delay may be the time required to transmit the host time code  205  from the host  105  to the client  115 . The communication delay may be determined from a one-way message and/or a round-trip message between the host  105  and the client  115 . 
         [0098]      FIG. 5A  is a schematic block diagram illustrating one embodiment of communicating  370  the host time code  205 . In the depicted embodiment, the presentation signal  280  includes a plurality of source presentation packets  290  sequentially over time  372 . The host time code  205  may be embedded in the presentation signal  280  as the presentation time code  285 . In one embodiment, the client  115  may parse the host time code  205  from the presentation signal  280  and update the client time code  210  with the host time code  205 . 
         [0099]      FIG. 5B  is a schematic block diagram illustrating one alternate embodiment of communicating  370  the host time code  205 . In the depicted embodiment, the presentation signal  280  is communicated sequentially over time through source presentation packets  290 . The presentation signal  280  may be communicated to a first communication port. The host time code  205  as the presentation time code  285  may be communicated separately to a second communication port. 
         [0100]      FIG. 5C  is a schematic block diagram illustrating one alternate embodiment of communicating  370  the host time code  205 . In the depicted embodiment, the time code request  296  is communicated from the client  115  to the host  105 . The host may respond to the time code request  296  by communicating the host time code  205  to the client  115 . 
         [0101]      FIG. 5D  is a schematic block diagram illustrating one embodiment of controlling the presentation of the source presentation  275 . In the depicted embodiment, the presentation signal  280  is communicated over time  372 . A play command  250   a  may be received at the client  115  at a first presentation time code  285   a . The play command  250   a  and a first command time code  255   a  equal to the first presentation time code  285   a  may be recorded as an entry  233   a  in the command record  230  has shown in  FIG. 5E . The play command  250   a  may cause the client  115  to present the presentation signal  280 . All the presentation time codes  285  may be synchronized to the host time code  205 . 
         [0102]    A pause command  250   b  may be received of the client  115  at a second presentation time code  285   b . The pause command  250   b  and a second command time code  255   b  may be recorded as an entry  233   b  in the command record  230  of  FIG. 5E . The second command time code  255   b  may be equal to the second presentation time code  285   b . The client  115  may receive a response signal  240  at a first response time code  245   a  synchronized to the host time code  205 . The response signal  240  may terminate at a second response time code  245   b  synchronized to the host time code  205 . 
         [0103]    After recording the response signal  240 , the client  115  may receive a play command  250   c  at a third presentation time code  285   c . The play command  250   c  and a third command time code  255   b  may be stored as an entry  233   c  in the command record  230 . The third command time code  255   c  may be equal to the third presentation time code  285 . 
         [0104]      FIG. 5E  is a schematic block diagram illustrating one embodiment of the command record  230 , with the commands  250  and command time codes  255  recorded as entries  233  in response to the presentation of the source presentation  275  as described for  FIG. 5D . 
         [0105]      FIG. 5F  is a schematic block diagram illustrating one embodiment of presenting the source presentation  275  and the response signal  240  of  FIG. 5D . In the depicted embodiment, the first response time code  245   a  is set equal to the second presentation time code  285   b  and the third presentation time code  285   c  is set equal to the second response time code  245   b . As a result, the presentation signal  280  and the response signal  240  are presented as a contiguous signal. In one embodiment, the source presentation  275  and the response signal  240  are presented as a contiguous signal to one or more clients  115 . 
         [0106]    A comment signal  263  may be recorded at a comment time code  265  during the presentation of the source presentation  275  and the response signal  240 . The comment signal  263  may later be presented with the source presentation  275  and the response signal  240  beginning at the comment time code  265 . 
         [0107]      FIG. 5G  is a schematic block diagram illustrating one alternate embodiment of presenting the source presentation  275  and the response signal  240  of  FIG. 5D . In the depicted embodiment, the presentation signal  280  and the response signal  240  are presented with the original timing based on the host time code  205  as shown in  FIG. 5D . 
         [0108]    A comment signal  263  may be recorded at a comment time code  265  during the presentation of the source presentation  275  and the response signal  240 . The comment signal  263  may later be presented with the source presentation  275  and the response signal  240  beginning at the comment time code  265  as shown in  FIG. 5H . 
         [0109]      FIG. 5H  is a schematic block diagram illustrating one alternate embodiment of presenting a source presentation  275  and a comment response  260  comprising a comment signal  263 . In the depicted embodiment, the first comment time code  265   a  is set equal to the second presentation time code  285   b  and the third presentation time code  285   c  is set equal to the second comment time code  265   b . As a result, the presentation signal  280  and the comment signal  263  are presented as a contiguous signal. In one embodiment, the source presentation  275  and the comment signal  263  are presented as a contiguous signal to one or more clients  115 . 
         [0110]    The embodiments synchronize the client time code  210  with the host time code  205 . In addition, the embodiments record the recorded response  235  and/or comment response  260  to the presentation of the source presentation  275  at the client  115  using the host time code  205 . As a result, the recorded responses  235  and comment responses  260  may be synchronized with the source presentation  275  when the source presentation is presented again. In addition, commands  250  and command time codes  255  may be recorded during the source presentation  275  and the source presentation  275  may later be presented modified by the commands  250  at the command time codes  255 . As a result, recorded responses  235  and comments are synchronized to the source presentation  275 . 
         [0111]    The embodiments may be practiced in other specific forms. The described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.