Abstract:
Apparatus and methods are provided to implement a technique for using a second display with a content playback device. In one implementation, this feature allows users to replay or resume playback of a recently-played asset directly via a second display. Knowledge of the recently-played asset could come from a second display or from a content playback device such as an IPTV. The recently-played list may be specific to the user account, a user profile within the user account, or the content playback device. In this way, the user is able to retrieve the asset on all their content playback devices, not only on the content playback device on which the asset was originally played. In some implementations, the second display may be a smart phone that can often be found beside the user, a laptop or tablet PC, or the like.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims benefit of priority of U.S. Provisional Patent Application Ser. No. 61/441,927, filed Feb. 11, 2011, entitled “METHOD TO PLAYBACK A RECENTLY-VIEWED ASSET VIA A SECOND DISPLAY”, owned by the assignee of the present application and herein incorporated by reference in its entirety. 
     
    
     BACKGROUND 
       [0002]    Internet delivery of digital content to IPTVs continues to increase, as does the popularity of IPTVs themselves. Digital content delivery is generally performed from content service providers. If an asset from a service is desired to be played multiple times, the user is generally required to navigate to the asset at the service provider and commence playback each time. For often-played assets, this becomes very inconvenient. 
       SUMMARY 
       [0003]    Systems and methods are provided that allow a user to replay or resume playback of a recently-played asset on the same content playback device or on a different content playback device. The replaying or resuming may be performed from a second display, which allows significant user convenience and flexibility over prior methods and systems. Data used in the system and method, e.g., about which asset has been recently-played, may be provided from the content playback device or from the second display. 
         [0004]    In one implementation, the following steps may be performed. A user loads a second display application, e.g., a web application, and selects an asset for playback. The user may also select a content playback device for playback, either before or after the asset choice. The user&#39;s actions cause a request to a management server to be made which processes the response for the asset playback. Besides processing the request, the management server adds an asset identification to a user&#39;s recently-played list so that the same will appear on the second display application when a request for display of the recently-played list is received. The asset is then played back on the selected content playback device, e.g. an IPTV. 
         [0005]    The asset playback may have been initiated by the user using the content playback device directly. If the asset is initiated by the content playback device, following playback of the asset on the same, or contemporaneous therewith, the content playback device sends a playback completion request to a management server. The management server recognizes the content playback device and adds an asset identification corresponding to the recently-played asset to a recently-played list. If the user loads the second display application, the user can access the asset by accessing the recently-played list. 
         [0006]    Variations of the system and method may be seen. For example, an expiry date may be provided for assets so that the system may be organized by periodic cleaning procedures. The recently-played list may belong to the user, not the IPTV. In this way, the user may be enabled to retrieve and playback a given asset on any of their content playback devices. In one method of implementation, each asset may have associated therewith a time stamp corresponding to the time of playback. By comparing these time stamps, the last-in-time asset may be determined and either played back or offered for playback, with a suitable user prompt. Distinctions may be made and employed regarding which second display requested the asset, which content playback device played the asset, or which user requested the content, the last by employment of a user profile within the user account. In other words, different most recently-played assets may be displayed for different users, or as tied to different devices. In other situations, a global, user-specific, or second display-specific list may be maintained, tied to the overall user account, or a combination of different types of lists may be maintained and displayed. A global or user-specific list may be particularly pertinent where a user is moving from one room to another, and wishes to continue viewing of an asset from room-to-room. 
         [0007]    To enable the same asset to be played, its associated asset identification may be stored by the system and used by a user to direct that asset playback be initiated on the new content playback device, to request or resume playback of the same asset. Where the user does not immediately resume or replay playback of an asset, but rather where a period of time has passed, the content URL may change due to various reasons. However, knowledge by the system of the asset identification and/or category identification will enable the same asset to be found, requested and played back, even on disparate platforms. 
         [0008]    The second display provides complementary functionality to the IPTV, and generally do not require additional investment by the user because the same make use of a device, e.g., a smartphone, laptop computer, tablet computer, an internet appliance, etc., which most users would already have in their possession. Such a second display provides a complementary functionality to a content playback device such as an IPTV because of the second display&#39;s strength in supported languages and character font sets, data entry, processing power, and user experience in content management. 
         [0009]    Where the second display application is a web application, the same may be scripting or non-scripting. The second display application may also be a Java application or any other sort of application that may communicate with a server. For example, the ASP/.NET framework with RPC can be employed to write the second display application. Where the web application running on the second display is written in HTML or HTML with Javascript, the same may be loaded by any device with a browser, and so the same is not limited to only a small set of compatible devices or expensive remote controls. Where a smartphone is employed, a mobile version of the second display user interface may be employed, with an appropriate listing of fields and an appropriate mobile resolution. 
         [0010]    Communications with service providers may take place through a proxy server, and the proxy server presents to service providers the authentication credentials of the content playback device, so that the second displays appear to the service providers as authenticated content playback devices. 
         [0011]    As noted above, the second displays may include any device that can run an application that communicates with a content playback device, including, but not limited to, personal computers, laptop computers, notebook computers, netbook computers, handheld computers, personal digital assistants, mobile phones, smart phones, tablet computers, hand-held gaming devices, gaming consoles, Internet appliances, and also on devices specifically designed for these purposes, in which case the special device would include at least a processor and sufficient resources and networking capability to run the second display application. 
         [0012]    The content playback device can take many forms, and multiple content playback devices can be coupled to and selected within a given local network. Exemplary content playback devices may include IPTVs, DTVs, digital audio systems, or more traditional video and audio systems that have been appropriately configured for connectivity. In video systems, the content playback device includes a processor controlling a video display to render content thereon. 
         [0013]    In a general method, a user employing a second display has a user account with a source or clearinghouse of services. Here, the source or clearinghouse is represented as a user account on a management server, but it should be understood that the user account may be with a service provider directly. The user account may have information stored thereon related to what content playback devices are associated with the user account. When a user logs on, they may see this list of content playback devices and may choose a particular content playback device. If there is only one content playback device on the network, or if the user is browsing in a way that the content playback device identity is not needed, then this step may be omitted. Moreover, a user may control content playback devices that are not included in a user account. For example, content playback devices may be discoverable and controllable, e.g., via infrared or Bluetooth® or otherwise, that are not part of the user account with a management server or with a service provider. It may even be possible for a user to playback content on such a content playback device, if a service provider has made available content that can be delivered without access made to a user account. 
         [0014]    Once a content playback device has been chosen, a list of services may be displayed. The list of services may be customized to those that have content playable on the chosen content playback device, or all available content may be displayed, in which case, e.g., a notation may be displayed adjacent the asset as to whether it is playable on the selected device. 
         [0015]    Where no content playback device has been selected, all available content may be displayed. If no content playback device has been selected, but the user account includes stored information about which content playback devices are available, then all content may be displayed, a subset of all content may be displayed based on the known content playback devices associated with the account, or notations may be presented about which content playback devices can play which content, or a combination of these. In some cases, a content service provider may require a content playback device to be chosen so as to determine if content from that service provider may be played back. In other cases, no content playback device need be chosen and the user may simply choose and queue content for later playback by a content playback device to-be-determined at a later time. 
         [0016]    Assuming multiple services are available, the user then selects a service to browse. In many cases, access to a service requires becoming affiliated with the service. Details of such affiliation processes are provided in U.S. patent application Ser. No. 12/982,463, filed Dec. 30, 2010, entitled “Device Registration Process from Second Display”, owned by the assignee of the present application and incorporated by reference herein. Once the content playback device is affiliated with the services, the user may choose which service they wish to browse. Where a content playback device has not been chosen, the user may still choose services and browse, but the content offerings may be less specific to a given content playback device. The service presents a list of available assets. The presentation may be in any number of forms, including by category, by keyword, or in any other form of organization. The proxy server presents an authentication credential of the content playback device to the content server. In some cases, credentials for accessing the various services may be stored in the user account, and presented by the proxy server or management server to the content server when needed. 
         [0017]    Individual services may employ their own DRM schemes which the current systems and methods may then incorporate. For example, if a video content service provider only allows a predetermined number of devices on which their content may be played back, then this rule may be enforced or duplicated within the context of the current system and method. Moreover, changes to such service provider rules or other parameters may be periodically polled for by the proxy server and/or management server, or the same may be polled for at a subsequent login of the service, e.g., at the time the affiliation is renewed. In other words, upon login, the system and method may poll for and receive a token associated with the given service provider, the token providing information to the system about the service provider as well as about the user account with the service provider. 
         [0018]    The system and method may include a management server as mentioned above which, along with the content playback device, communicates with at least one content server such that the content server provides assets for presentation at the content playback device. The system and method may further include a proxy server communicating with the management server and the second displays. In some cases, the proxy server may be merged with the management server, or in other cases a separate proxy server may be provided for each content server or service provider. 
         [0019]    In one aspect, the invention is directed to a method of enabling a user to access a recently-played asset, including, upon playback of an asset on a first content playback device, adding an asset identification corresponding to the asset to a recently-played list, the asset streamed from a service provider, the recently-played list stored on a management server, the management server providing access to a plurality of service providers; and generating a recently-played list for display in a first second display, the recently-played list including an entry corresponding to the asset identification. 
         [0020]    Implementations of the invention may include one or more of the following. The generating a recently played list may include formatting the recently-played list for display on a number of different types of second displays, the types of second displays including: a tablet computer, a smart phone, a laptop computer, an internet appliance, or a computing device with internet access. The method may further include associating a timestamp with the asset identification. The method may further include ordering the generated recently-played list according to timestamp. The method may further include receiving a request for an asset on the recently-played list to be played back, the request sent from the first or another second display. The method may further include causing the requested asset to be played back on the first or on a second content playback device. The adding an asset identification may include, at an end of playback on the first content playback device, receiving a playback completion request. The playback of an asset may include receiving from the first second display a request for playback of the asset, and causing the first content playback device to receive the asset. The receiving the request for playback may cause the adding. The asset may have associated therewith an expiration date, and the method may further include, on or after the expiration date, removing the asset from the recently-played list. The recently played list may be specific to each content playback device or each second display, or specific to a user account or a user profile on the user account. The asset identification may include a current location, such that upon a subsequent request for the asset, playback starts at the current location. Alternatively, the asset identification may include a current location, and the method may further include, upon a subsequent request for the asset, displaying a prompt, on the second display requesting the asset, inquiring as to whether playback should start at a beginning of the asset or at the current location. The method may further include filtering the generated list based on a regional ruleset corresponding to a region in which the first content playback device resides. 
         [0021]    In another aspect, the invention is directed to a non-transitory computer-readable medium, comprising instructions for causing a computing device to implement the above method. 
         [0022]    In a further aspect, the invention is directed to a method of enabling a user to access a recently-played asset. The method includes the steps of, upon playback of an asset on a first content playback device, transmitting an asset identification corresponding to the asset to a management server, the asset streamed from a service provider, the recently-played list stored on a management server, the management server providing access to a plurality of service providers; and displaying on a second display a recently-played list, the recently-played list including an entry corresponding to the asset identification. 
         [0023]    Implementations of the method may include one or more of the following. The second display may be a tablet computer, a smart phone, a laptop computer, an internet appliance, or a computing device with internet access. The method may further include associating a timestamp with the asset identification. The method may further include ordering the generated recently-played list on the second display according to timestamp. The method may further include transmitting a request for an asset on the recently-played list to be played back. The method may further include causing the requested asset to be played back on the first or on a second content playback device. The method may further include transmitting a playback completion request at an end of playback on the first content playback device. The method may further include associating a current location with the asset identification. The method may further include transmitting a request for an asset on the recently-played list; receiving a request for user input, the request inquiring as to whether playback of the asset should start at a beginning of the asset or at the current location; and transmitting a response to the request for user input to the management server. The recently-played list may be specific to the second display, or specific to a user account or a user profile on the user account. The method may further include filtering the recently-played list based on a regional ruleset corresponding to a region in which the first content playback device resides. 
         [0024]    In yet a further aspect, the invention is directed to a non-transitory computer-readable medium, comprising instructions for causing a computing device to implement the above method. 
         [0025]    Advantages of certain embodiments of the invention may include one or more of the following. Systems and methods according to the principles described here allow a set of assets to be queued in a recently-played list, allowing convenient access to such assets, and allowing a user to move from one content playback device to another while still viewing an asset in a continuous manner. The systems and methods allow a user to have a set of assets ready to watch, even on a brand-new content playback device, because the same will have access to the user profile immediately upon registration with the user account, e.g., registration with a management server infrastructure providing access to service providers. 
         [0026]    Other advantages will be apparent from the description that follows, including the figures and claims. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0027]    Like reference numerals denote like elements throughout. 
           [0028]      FIG. 1  is a block diagram of an exemplary system in accordance with one aspect of the present principles. 
           [0029]      FIG. 2  is a sequence diagram illustrating a system and method according to another aspect of the present principles. 
           [0030]      FIG. 3  is a flowchart illustrating an exemplary method according to a further aspect of the present principles. 
           [0031]      FIG. 4  is a flowchart illustrating an exemplary method according to yet another aspect of the present principles. 
           [0032]      FIG. 5  is a diagram illustrating various types of recently-played lists that may be presented on a user interface of a second display in accordance with another aspect of the present principles. 
           [0033]      FIG. 6  is a block diagram of an exemplary server in accordance with another aspect of the present principles. 
           [0034]      FIG. 7  illustrates an exemplary computing environment, e.g., that of the disclosed second display, proxy server, management server, or content server. 
       
    
    
     DETAILED DESCRIPTION 
       [0035]    Referring initially to  FIG. 1 , a system  10  is shown including a content playback device  12  coupled to a local network  16 , which may be wired, wireless, or a combination of both. Also coupled to the local network  16  are one or more second displays  14   a - 14   c , an exemplary one of which is termed herein second display  14   i . A number of servers may be accessed by the content playback device  12  and the second display  14   i  through the local network  16  and the internet  25 , including a management server  18 , a proxy server  22 , and one or more content servers  24  corresponding to service providers (only one is shown in  FIG. 1 ). 
         [0036]    The second display  14   a  includes a user interface  23  for a second display application which when launched may in turn control in a number of aspects of the content playback device  12 , including which assets from various service providers are played back. In one aspect, according to the principles described here, the user interface may display a recently-played list  29 ′, the list including assets that have been recently played by the user, and which corresponds to a recently-played list  29  of assets stored on the management server  18 . Different ways in which the recently-played list may be generated and used are described below. 
         [0037]    Using this system  10  of  FIG. 1 , a user of the second display  14   a  is provided with a convenient way to replay or resume playback of a recently-played asset. In this way, the user is saved the inconvenience of having to navigate to the service from which the asset was played, find the asset, and arrange for playback of the same. Moreover, the convenient and flexible user interface  23  of the second display  14   a  may then be leveraged to choose other content from service providers for playback on the content playback device  12 . 
         [0038]    Details of individual components are now described. 
         [0039]    The content playback device  12  may be, e.g., an IPTV, a digital TV, a digital sound system, a digital entertainment system, a digital video recorder, a video disc player, a combination of these, or any number of other electronic devices addressable by a second display or other control on the local network  16 . For the sake of simplicity, in this specification, the content playback device  12  will generally be exemplified by an IPTV, in which case the same will typically include a processor that controls a visual display and an audio renderer such as a sound processor and one or more speakers. The processor may access one or more computer-readable storage media such as but not limited to RAM-based storage, e.g., a chip implementing dynamic random access memory (DRAM), flash memory, cloud-based storage, or disk-based storage. Software code implementing present logic executable by the content playback device  12  may also be stored on one or more of the memories disclosed below to undertake present principles. The processor can receive user input signals from various input devices including a remote control device, a point-and-click device such as a mouse, a keypad, etc. A TV tuner may be provided in some implementations, particularly when the content playback device  12  is embodied by an IPTV, to receive TV signals from a source such as a set-top box, satellite receiver, cable head end, terrestrial TV signal antenna, etc. Signals from the tuner are then sent to the processor for presentation on the display and sound system. A network interface such as a wired or wireless modem communicates with the processor to provide connectivity to the Internet through the local network  16 . It will be understood that communications between the content playback device  12  and the internet  25 , or between the second display  14   i  and the internet, may also take place through means besides the local network  16 . For example, the second display  14   i  may communicate with the content playback device  12  through a separate mobile network. 
         [0040]    The one or more second displays  14   a - 14   c  each bear a processor and components necessary to operate an application for, e.g., service provider and content selection, as well as for display of a recently-played list of assets. In particular, the processor in the second display may access one or more computer-readable storage media such as but not limited to RAM-based storage, e.g., a chip implementing dynamic random access memory (DRAM), flash memory, or disk-based storage. Software code implementing present logic executable by the second display may also be stored on one of the memories disclosed below to undertake present principles. Further, the second display  14   i  can receive user input signals from various input devices including a point-and-click device such as a mouse, a keypad, a touchscreen, a remote control, etc. The second display  14   i  may also receive user commands via the internet, such as via a remote control. For example, in some cases, remote data entry may be performed, or a command may be triggered, on a second display from a remote location via the internet. A network interface such as a wired or wireless modem communicates with the processor to provide connectivity to the local network and to wide area networks such as the Internet as noted above. 
         [0041]    The servers  18 ,  22 , and  24  have respective processors accessing respective non-transitory computer-readable storage media which may be, without limitation, disk-based and/or solid state storage. The servers communicate with a wide area network such as the Internet via respective network interfaces. The proxy server  22  may in some cases be combined with the management server  18 , although in many cases it may be preferable to separate the servers to better accommodate server load. The servers may mutually communicate via the internet  25 . In some implementations, the servers may be located on the same local network, in which case they may communicate with each other through the local network without accessing the internet. For example, in one exemplary implementation, the management server  18  and the proxy server  22  may be disposed in the same data center, so communication between the two may stay within the data center. 
         [0042]    While an exemplary method of the system is described below, certain method steps especially pertinent to certain arrangements of the second display will be described here. 
         [0043]    Responsive to the second display  14   i  sending a request to the proxy server  22  for an executable utility, the proxy server  22  returns the utility to each second display  14   i . Running the utility causes the initialization of an application. The implementation discussed here includes a web application, but it will be understood that other types of applications may also be employed. 
         [0044]    The second display  14   i , executing the web application, prompts a user to input to each second display  14   i  login information. The login information may be common or may differ between second displays. The proxy server  22 , responsive to reception of correct login information from the content playback device  12 , returns the local IP address of the content playback device  12  to the second display  14   i , because the same has previously been registered to a user account in which such information is maintained. The proxy server  22  may also return an external IP address. In this way, communications may be allowed from outside the local network, e.g., by a second display to a content playback device. 
         [0045]    The proxy server  22  may also return a list of content playback devices on the local network, responsive to which the second display  14   i  may select one for content playback. In turn, each second display  14   i  uses the local content playback device address to access the content playback device  12  directly to request information about the content playback device  12 , which information is returned from the content playback device  12  to the second display  14   i  such that the local address of the content playback device  12  need not be globally addressable. Each second display  14   i  may also select content for playback on different content playback devices. The second display  14   i  sends the information about the content playback device  12  to the proxy server  22 , requesting a list of services available to the content playback device  12  from one or more service providers. The services may be dependent on the device characteristics of the content playback device  12  chosen. For example, if the chosen content playback device  12  is an IPTV, video services may be returned. If the chosen content playback device  12  is an audio system, audio services may be returned. 
         [0046]    The proxy server  22  relays the request for a list of services to the management server  18 , which returns the list to the proxy server  22 , with the proxy server  22  in turn sending the list to the second display  14   i  for presentation of information on the second display  14   i . Responsive to a user selection of an item on the list, the second display  14   i  sends a request for a software asset corresponding to the selected asset to the proxy server  22 . The proxy server  22  requests a service login of the content server  24  providing the content, and the content server  24  provides to the proxy server  22  a list of assets, categories, or services, and the proxy server  22  relays the list to the second display  14   i , which is presented on the second display  14   i  so that the user can navigate to enter a selection. Responsive to the selection, the second display  14   i  sends a command to the content playback device  12  to access and play back the selection. 
         [0047]    The command to play the local asset may be in a number of forms. The second display  14   i  may communicate to the proxy server  22  the request on behalf of the content playback device  12 , and this request may be via the local network or via other means. Alternatively, the second display  14   i  may transmit a request to the content playback device  12  that it itself formulates the request, and this transmission may be by way of the local network, the internet generally, or via other means such as other wired or wireless transmission schemes, including via USB, IR, Bluetooth®, or any other schemes. If the second display  14   i  is configured to address the content playback device  12  at a non-local level, e.g., at the server level, then the second display  14   i  may be physically located virtually anywhere and still be able to queue content or to command the content playback device  12  to play content. In this case, however, server load would increase over the case where the second display and content playback device communicated directly or over a local network. 
         [0048]    Certain method steps of an arrangement of the content playback device are described here. Using a network interface, the content playback device  12  can communicate with a management server  18  on the Internet and with one or more content servers  24 , also on the internet and communicating with the management server  18 . The management server  18  receives and stores a local IP address of the content playback device  12 . The content playback device  12  communicates with the management server  18  to arrange for assets from the content server  24 , operated by a service provider, to be played back on the content playback device  12 . In more detail, in one embodiment, the content playback device  12  sends login information to the management server  18  which returns to the content playback device  12  a user token that must subsequently be presented by the content playback device  12  to the content server  24  to obtain content from the content server  24 . 
         [0049]      FIG. 2  is a sequence diagram illustrating an exemplary implementation of a method for enabling a user to employ a second display to browse content playback devices, service providers, and assets and select the same for playback by a content playback device.  FIG. 2  assumes that the user has already created an account with a management server and has affiliated one or more content playback devices with that account. 
         [0050]    At state  52 , a user turns on the content playback device  12 . At state  54  the content playback device sends login information including, e.g., username and password, to the management server  18 , which at state  56  returns to the content playback device a user token that may subsequently be presented by the content playback device to a content server  24  to obtain content from that server. The management server  18  in addition stores the local IP address of the content playback device  12 . 
         [0051]    At state  58 , the user turns on the second display  14   i  and instantiates a web browser session in which control may be exercised over the content playback device. Other types of sessions may also be employed as has been noted. A utility is executed on the second display  14   i , at state  60 , which sends a request to the proxy server  22 , which returns in state  62  a web application, e.g., HTML with JavaScript, for the second display to execute for browsing services and assets. This application may make, e.g., asynchronous JavaScript and XML calls to the proxy server  22  and to the content playback device  12  to obtain information to control the content playback device  12 . 
         [0052]    At state  64 , using the JavaScript received from the proxy server  22 , the second display  14   i  prompts the user to input to the second display  14   i  the account login information, including, e.g., the same username and password that the content playback device provided to the management server  18  in state  54  during device registration. Of course, the account login information may differ as well. The user may be prompted to cache login information as well. It will be appreciated that the servers  18 ,  22 , and  24  communicate necessary account information between them as needed to realize the principles described here. 
         [0053]    The proxy server  22  responds to a correct user name and password from the second display  14   i  in an authentication request state  63 . The proxy server  22  verifies the user name and password with the management server  18  (states  67  and  69 ), creates and transmits a session token to the second display, obtains information about content playback devices affiliated with the user account, and completes the authentication in state  65 . The proxy server  22  may return to each second display the information about all content playback devices  12  that are affiliated with the user account associated with the user name and password, including their local IP addresses which were stored by the management server  18  after login at  54  (and subsequently provided to the proxy server  22 ). In more detail, the proxy server  22  sends a token to the second display  14   i , the token associated with a content playback device, and this token is communicated in future transactions between the second display and the proxy server, so that the proxy server  22  knows what content playback device the asset is intended for. Each user with each second display may then choose a content playback device and browse the services and content options available through the services in state  96  and subsequent steps. 
         [0054]    The second display  14   i , using the local IP address returned as noted above, accesses the content playback device directly, in the sense of communicating through the local network. To select a particular content playback device, the second display  14   i  requests information about the content playback device  12  at state  70 , including language information, digital rights management (DRM) information, etc., as desired, which information is returned from the content playback device to the second display  14   i  at state  72 . Since the second display  14   i  knows the IP address of the content playback device  12  and consequently communicates directly with the content playback device  12 , the second display  14   i  communicates using a local web address of the content playback device  12  that need not be globally addressable, and may so communicate as long as the second display  14   i  and content playback device  12  are on the same local network. 
         [0055]    Each second display  14   i  may send the client information received at state  72  to the proxy server  22 , requesting a list of services available to the content playback device  12 , or that the content playback device  12  is entitled to, from one or more of the content servers  24 . The proxy server  22  relays the request to the management server  18 , which returns the requested service list to the proxy server  22 . The proxy server  22  in turn sends the services list to the second display for presentation of available services on the second display. Each user browses the services and their content on the second display just as though it were the actual content playback device. 
         [0056]    A user can input, using, e.g., a second display input device, a selection of a service on the list that was returned to the second display. In response, the second display, at state  74 , sends a request for the corresponding service to the proxy server  22  along with the service token that that second display may have received from the content server  24  via the management server  18 . 
         [0057]    Responsive to the request, the proxy server  22  requests a service login at state  86  of the content server  24  providing the selected service. At state  88 , the content server  24  provides to the proxy server  22  a list of assets, categories or services, as the case may be, for the particular content server  24 . If desired, the proxy server  22  may also request of the content server  24  a list of options, and the list may be returned in, e.g., extended markup language (XML) format to the proxy server  22  which relays the assets, categories, services, etc. available for selection to the second display at the state  80 . 
         [0058]    The content available for selection is presented on the second display so that the user can navigate (in state  97 ) the display to enter a selection. Responsive to the selection, the second display at state  98  sends a command to the content playback device  12  to play the selection, and in particular sends a playlist id or reference identifier indicating the selection. At state  100 , the content playback device  12 , using its authentication credentials, sends the playlist id or reference identifier to the proxy server  22 , which returns the required playlist data in state  102 . The content playback device  12  can then request the content URL with the playlist data in state  104 , which may be responded to with a return of the content URL for playback of the asset on the content playback device  12  in state  106 . 
         [0059]    Variations of the system and method are now described. 
         [0060]    If the content playback device were already playing content, the new content commanded to be played by the second display may be placed in a queue in the content playback device and played when the current content completes. In any case, once the content has been commanded to be played, the user may continue to browse the second display for other content, to play or add to the queue. Other users on the network may employ their own second displays to do the same. A user may also desire to switch devices and resume playback on a different device by, e.g., navigating to a “recently played” list as described below and selecting the last video played after switching control to the desired device. 
         [0061]    The above description has been for the case where the proxy server  22  is employed to hide the content source, e.g., a content URL, from the second display  14   i . That is, the proxy server  22  provides an API for the second display to use so that the content and/or content URL cannot be accessed directly. In this way, the details of the management server transactions to access the services remain desiredly unknown. In many cases, the second display  14   i  may have stored thereon little or no details about the content playback device  12 . In some cases, however, the URL may be directly provided from the proxy server  22  or the proxy server  22  may even be bypassed, e.g., in cases where the asset is intended for free distribution, e.g., movie trailers or the like. Similarly, while the above description has focused on asset playback on content playback device  12 , certain assets, e.g., those which are intended for free distribution, may be played back on the second display  14   i  itself, if the same has been appropriately configured. 
         [0062]    In the case where multiple second displays request content to be played at or near the same time, a simple rule such as the first-in-time may prevail. Alternatively, a priority scheme may be configured, such that certain second displays take precedence over other second displays. Alternatively, a plurality of user profiles may be employed, and precedence may be based on the identity of specific users. 
         [0063]    The control device may command the content playback device to play content by sending, to the content playback device over the local network, commands coded as if they were sent from an infrared remote control, e.g., the commands may be in the Sony Infrared Remote Control System (SIRCS) protocol. 
         [0064]      FIG. 3  illustrates an overall method  30  including steps for causing a recently-played list to be populated and steps for using a recently-played list. The method  30  may especially pertain to steps performed by a server. 
         [0065]    A first step is the establishment of a user account session between a second display and a server, via a second display application (step  112 ). The second display application may be a web application, a native application, or any other application by which a second display may communicate with the server. The session is generally associated with a user account, and typically includes entering logon credentials such as a username and password by the user. Other variations will also be understood. The server may be a management server, a proxy server, or the like. 
         [0066]    A next step is to cause the display of one or more content playback devices (step  114 ). The displayed content playback devices may be those associated with the user account using a registration process or other unregistered content playback devices, e.g., those discovered by the second display, such as via Bluetooth®, infrared, or other such signal communication techniques. 
         [0067]    A next step is to receive user input regarding which content playback device is to be used (step  116 ). 
         [0068]    A next step is to display one or more affiliated services (step  118 ). These affiliated services are those associated with the user account. Other services may also be displayed, such as to introduce a user to the service and to encourage affiliation. 
         [0069]    A next step is to receive user input regarding which service to browse (step  122 ). Once the service is selected and accessed, assets of the service may be displayed (step  124 ) according to the configuration of the service. 
         [0070]    A user input may then be received regarding an asset to be played back (step  126 ). A request is transmitted for the asset to a server (step  128 ), such as a management server. The server processes the playback request (step  132 ). 
         [0071]    On the management server, the asset identification is added to a user&#39;s recently-played list (step  134 ). In one implementation, the asset identification includes a timestamp, to identify when the asset was played back. The timestamp may generally be used to order the recently-played list. The asset is played back on the chosen content playback device (step  136 ). Subsequently, upon the next display of the recently-played list, the asset identification will appear (step  138 ). The user may select the asset identification from the list to cause the corresponding asset to playback, to resume playback, or perform other functions as described below. 
         [0072]    In one variation, the second display application may prompt the user to playback the asset whose timestamp is latest in time (step  142 ). That is, by comparing the timestamps, the last in time may be determined and either played back or offered for playback. Such a step would make particularly convenient the continued playback of an asset by a user, especially where the user does not finish viewing the asset in its entirety at one sitting. In another variation, the asset notation on the recently-played list may be caused to expire by the inclusion of an expiry date associated with the asset (step  144 ). The same may allow the system to be organized with periodic cleaning procedures. 
         [0073]    In  FIG. 3 , data about the recently-played asset was received at the server, either directly or indirectly, from the second display. In  FIG. 4 , the asset is initiated by the content playback device, and the same is employed to transmit data about the recently-played asset to the server. 
         [0074]    In particular, a flowchart  40  is illustrated in which a first step is for the asset to be played back on the content playback device (step  146 ). At the end of the playback of the content, the content playback device sends a playback completion request to the server (step  148 ). The server recognizes the content playback device, and adds the asset identification to a recently-played list associated with the user (step  152 ). As will be described, the asset identification may also be added to other lists associated with the user account, either instead of or in addition to a global recently-played list. Upon the next loading of the recently-played list, the asset will appear (step  154 ). 
         [0075]    Variations of the above method will also be seen. For example, steps  142  and  144  of  FIG. 3  may also be employed in the implementation of  FIG. 4 . 
         [0076]      FIG. 5  schematically illustrates how different types of recently-played lists may be portrayed on a user interface  23  of the second display  14   i . Different lists may be generated because the scope of assets taken into account in generating the lists may differ. 
         [0077]    For example, a recently-played list  29   a ′ provides a global or user account-based view. In this view, the recently-played assets from all content playback devices on the user account, or accessible to the user account, are considered. In other words, no matter which content playback device was used for playback, a set of the most recently-played back assets from all content playback devices will appear. 
         [0078]    By contrast, a recently-played list  29   b ′ provides a user profile-based view. In this view, a number of user profiles are associated with the user account. For example, each family member may have their own user profile. The recently-played list may then be based on the user profile, so the recently-played assets will be specific to the user. Upon logging onto the user profile, the displayed recently-played list will include the most recently-played assets directed to be played back from that user profile, but will not include assets directed to be played back from other user profiles associated with the user account. Such a list may be convenient to allow a user to just focus on their own items of interest. 
         [0079]    It is noted in this connection that various lists as described may be combined, or multiple types of lists may be presented as alternatives for viewing by the user. In this way, a family member may view their own items of interest or may view what the rest of the family has watched. Moreover, certain user profiles may include special administrator privileges, so as to allow inspection of asset playback routines corresponding to other user profiles. 
         [0080]    Another type of recently-played list is that portrayed by list  29   c ′, which is a content playback device-based view. This type of list may be appropriate for asset playback where the particular content playback device is the only one capable of playing the asset. In an alternative implementation, a recently-played list may be based not on a particular content playback device but on a category of content playback devices, such as IPTVs or audio receivers. In this way, a user may review recently-played assets appropriate to a given type of content playback device. For example, if a user desires to listen to music, it would be superfluous for the recently-played list to include video content, and thus the user could employ a list like  29   c ′ to specifically look for recently-played audio assets. In an alternative embodiment, where a user has chosen a content playback device for playback, the recently-played list may be automatically filtered based on the type of the chosen content playback device. 
         [0081]    Other variations will also be seen. For example, because the user account and user profile may allow a user to set up a friends list, a user may be enabled to view recently-played lists of their friends&#39;. In another variation, a display may be provided to all or a subset of friends listing the most popular recently-played list, where popularity is defined as the most views amongst a group of friends. In another implementation, a list of the most recently-played items may be displayed, weighted by the local or global popularity of the items. In either case, such lists allow users to discover content they may otherwise have missed. 
         [0082]    It will be noted that numerous other variations of the above may be understood, the same being within the scope of the current principles. 
         [0083]    Referring to  FIG. 6 , an implementation of a server  50  is illustrated. In this implementation, the server includes various memory locations bearing computer-readable instructions capable of performing various steps. The server may be, e.g., a proxy server, a management server, or any other sort of server as described above. The server  50  includes a processor  165  and memory  167  bearing computer-readable instructions capable of receiving a user choice of an asset from a second display. These computer-readable instructions would be especially pertinent with regard to the method of  FIG. 3 . The server  50  may further include memory  169  bearing computer-readable instructions capable of receiving data indicating a played back asset from a content playback device. These computer-readable instructions would be especially pertinent with regard to the method of  FIG. 4 . Generally the server  50  will include both memories  167  and  169 , although in a given implementation only one is required. 
         [0084]    The server  50  further includes memory  171  bearing computer-readable instructions capable of storing data about a user chosen asset or a played back asset in a recently-played list. This memory takes the information from memories  167  or  169 , or both, and compiles the same in the recently-played list. Next, the server  50  includes memory  177  bearing computer-readable instructions capable of causing a display of the recently-played list in a user interface of a second display. The memory  177  generally requires at least making a recently-played list available for access by a second display, or making the data necessary to compile the list available to the second display. In the latter case, the second display generates the list based on the data. Finally, the server  50  includes memory  179  bearing computer-readable instructions capable of receiving a selection from a second display of an asset on the recently-played list, the input indicating that the asset is to be replayed. 
         [0085]    Other memories will also be understood, although these are not shown in  FIG. 6 . For example, memories may be provided which bear computer-readable instructions capable of storing a current location of a played asset, and upon request for a replay of the asset by the user, either initiating playback at the current location or requesting if the user wishes to start playback at the beginning of the asset or at the current location. 
         [0086]    In an alternative implementation, these memories may be implemented as modules, either in software, hardware, or various forms of firmware. For example, a session module may be employed to establish user account sessions between the server and the second display. A database module may be employed to store the recently-played list. Communications modules may be employed to provide data-transfer asset streaming. Other modules will also be understood. 
         [0087]    Systems and methods have been disclosed that allow improvement of the user experience of the IPTV without adding to the hardware costs of the unit. As disclosed above, users may employ the system and method to replay a recently-played asset without having to search for the same within the context of a service provider. 
         [0088]    One implementation includes one or more programmable processors and corresponding computing system components to store and execute computer instructions, such as to execute the code that provides the second display or various server functionality, e.g., that of the proxy server  22 , management server  18 , and content server  24 . Referring to  FIG. 7 , a representation of an exemplary computing environment for a second display or for any of the servers is illustrated. 
         [0089]    The computing environment includes a controller  156 , a memory  174 , storage  172 , a media device  158 , a user interface  164 , an input/output (I/O) interface  166 , and a network interface  168 . The components are interconnected by a common bus  180 . Alternatively, different connection configurations can be used, such as a star pattern with the controller at the center. 
         [0090]    The controller  156  includes a programmable processor and controls the operation of the second display and servers and their components. The controller  156  loads instructions from the memory  174  or an embedded controller memory (not shown) and executes these instructions to control the system. In its execution, the controller  156  may provide the second display control of a content playback device system as, in part, a software system. Alternatively, this service can be implemented as separate modular components in the controller  156  or the second display. 
         [0091]    Memory  174 , which may include non-transitory computer-readable memory  175 , stores data temporarily for use by the other components of the second display  14   i , and the same may include memories  167 ,  169 ,  171 ,  177 , and  179 , as discussed above. In one implementation, memory  174  is implemented as RAM. In other implementations, memory  174  also includes long-term or permanent memory, such as flash memory and/or ROM. 
         [0092]    Storage  172 , which may include non-transitory computer-readable memory  173 , stores data temporarily or long-term for use by other components of the second display and servers, such as for storing data used by the system. In one implementation, storage  172  is a hard disc drive or a solid state drive. 
         [0093]    The media device  158 , which may include non-transitory computer-readable memory  161 , receives removable media and reads and/or writes data to the removable media. In one implementation, the media device  158  is an optical disc drive or disc burner, e.g., a writable Blu-ray® disc drive  162 . 
         [0094]    The user interface  164  includes components for accepting user input from the user of the second display, and presenting information to the user. In one implementation, the user interface  164  includes a keyboard, a mouse, audio speakers, and a display. The controller  156  uses input from the user to adjust the operation of the second display  14   i.    
         [0095]    The I/O interface  166  includes one or more I/O ports to connect to corresponding I/O devices, such as external storage or supplemental devices, e.g., a printer or a PDA. In one implementation, the ports of the I/O interface  166  include ports such as: USB ports, PCMCIA ports, serial ports, and/or parallel ports. In another implementation, the I/O interface  166  includes a wireless interface for wireless communication with external devices. These I/O interfaces may be employed to connect to one or more content playback devices. 
         [0096]    The network interface  168  allows connections with the local network and optionally with content playback device  12  and includes a wired and/or wireless network connection, such as an RJ-45 or Ethernet connection or “WiFi” interface (802.11). Numerous other types of network connections will be understood to be possible, including WiMax, 3G or 4G, 802.15 protocols, 802.16 protocols, satellite, Bluetooth®, infrared, or the like. 
         [0097]    The second display and servers may include additional hardware and software typical of such devices, e.g., power and operating systems, though these components are not specifically shown in the figure for simplicity. In other implementations, different configurations of the devices can be used, e.g., different bus or storage configurations or a multi-processor configuration. 
         [0098]    Various illustrative implementations of the present invention have been described. However, one of ordinary skill in the art will recognize that additional implementations are also possible and within the scope of the present invention. For example, while media content services have been focused on, the user may also browse, and store in a recently-played list, services for other types of business or consumer transactions, such as video rentals, home shopping sites, or the like on the second display. The recently-played list may include assets that are resident within the local network, e.g., content stored on a DVR or Blu-ray® player. In this case, no user account associated with a management server would be necessary. 
         [0099]    While the system and method have described implementations in which content playback devices have been selected by a user before browsing, numerous other variations are possible. For example, a cache or cookie or other information may be employed to store information about content playback devices, so that no user choice is necessary. In another example, samples of assets, e.g., movie trailers, may be obtained from content service providers, and these samples may be browsed freely without a user selection of a content playback device for playback even including playback on the second display if supported. In another variation, a profile system may be employed that communicates content playback device information upon start-up according to a profile; e.g., a given content playback device may always be associated with and may authenticate itself with a given service provider. In this sense, a content playback device is still being chosen, but the choice does not require an affirmative step by the user. Use of any of these alternatives, or others, ensures that the content consumption of each content playback device is tracked. It further allows, as described, the proxy server to filter out content that the content playback device is incapable of playing. Even where browsing requires no device choice at all, e.g., browsing shopping sites, some level of customization may occur, e.g., by consideration of the origination location of the visiting second display&#39;s IP address. 
         [0100]    In addition, the above description was primarily directed to implementations in which the local IP address of the second display was retrieved and stored on the server. However, other ways of discovering the second display are also possible. For example, device discovery is also possible using a broadcast method within the local network. Compatible devices that recognize the broadcast message will respond with their necessary credentials and information to indicate their compliance with the application for the second display. In many cases, broadcasting methods are primarily directed to native applications, not web applications; however, a broadcasting library may be employed to allow the implementation even within a web application. 
         [0101]    While the above description has focused on implementations where a second display is coupled to a content playback device through a local network or over the internet, it will be understood that the same will apply to any method by which the two may communicate, including 3G, 4G, and other such schemes. 
         [0102]    Accordingly, the present invention is not limited to only those implementations described above.