Abstract:
Techniques for editing a list of items are disclosed and may be used advantageously in portable devices without the drag-and-drop utility. According to one aspect of the present invention, a highlighting bar is provided to facilitate the selection of the item(s), the selected item(s) are then moved to a desired position, and released thereto to produce an edited list, all of which are achieved by using a finger pointing sensor (e.g., a scroll wheel) and one or more designated keys or buttons.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The invention is generally related to the area of man machine interface. In particular, the invention is related to method and apparatus for editing a list of items without using the drag and drop utility. 
     2. The Background of Related Art 
     The desire of enjoying multimedia productions such as music audio or video has been growing along with the advance of technologies in the consumer electronics industry. With the proliferation of the digital multimedia, a user can easily possess a large collection of audio or video files. One of the preferable ways to listen to or view these files is to play the files in accordance with a playlist. The playlist is an ordered list of a group of multimedia items. A player can play all items in the playlist, one after another in a certain order. In general, a user would create a playlist suited for his/her personal preference. Using a playlist, a person can choose only the audios or videos he/she likes and skip over others. For example, a person likes only to listen to a couple of tracks in an album including many tracks, or a particular album or few audio tracks from a selected artist. A playlist can be helpful and used to organize the selected items and skip over those unselected without further interventions from a user. 
     Editing such a playlist or queue on a personal computer can be readily achieved. After selecting an item in a queue with a pointing device (e.g., a mouse), a user may delete the item from the queue or move the item to a different location in the queue. However, when a device is not equipped with a pointing device, editing a queue becomes a challenge. For example, a queue is commonly used in an Apple iPod®. A scroll wheel of an iPod® allows a user to scroll a queue but is difficult to manage the queue, such as adding a number of songs to be played right after a particular song or moving a song from one position in the queue to another position in the queue. Another example is a digital camera with a display screen that shows a list of photos. A display of some or all of the photos on the display screen is generally in sequence, causing an exposure of some photos that are not meant for display. However, rearrangement of these photos for a pertinent display is a challenge because many digital cameras are not equipped with a pointing device to drag and drop a photo. 
     There is, thus, a need for mechanisms that can move an item or a group of items in a queue/playlist without having the luxury of an external controller (e.g., a mouse, a joystick, etc.) to select and move the items around. Such mechanisms would be especially useful for small portable devices that have simple interfaces such as a scroll or click-wheel and one or more keys or buttons. 
     SUMMARY OF THE INVENTION 
     This section is for the purpose of summarizing some aspects of the present invention and to briefly introduce some preferred embodiments. Simplifications or omissions in this section as well as in the abstract or the title of this description may be made to avoid obscuring the purpose of this section, the abstract and the title. Such simplifications or omissions are not intended to limit the scope of the present invention. 
     In general, the present invention pertains to editing a list that may be a queue or a playlist including items to be executed in an order. Without relaying on the luxury of an external controller providing the drag-and-drop utility (e.g., a mouse, a joystick, etc.) to select and move the items around the list, the present invention provides mechanisms to allow a user to effectively select, move, and position an item(s) in the list so that the items in a modified or edited list can be executed in a desirable order. 
     The present invention may be advantageously used in portable devices without the drag-and-drop utility. According to one aspect of the present invention, a highlighting bar is provided to facilitate the selection of the item(s), the selected item(s) are then moved to a desired position, and released thereto to produce an edited list, all of which are achieved without a drag-and-drop utility (e.g., a scroll wheel, and one or more designated keys or buttons). 
     The present invention may be implemented in many forms including software, hardware or a combination of both as a method and apparatus. According to one embodiment, the present invention is a method for editing a list of items. The method comprises displaying the list on a display screen, wherein the list is scrollable, selecting at least an item to be relocated in the list, relocating the selected item to a desired location in the list, and creating an edited list with different orders of the items. The selecting of at least one item comprises displaying a highlighting means after a designated action; and scrolling the highlighting means to the item to select the item by moving a finger on a finger pointing sensor (e.g., clockwise or counterclockwise on a scroll wheel, up or down on a control strip, and up or down buttons). The relocating of the selected item to a desired location in the list comprises moving a finger on the finger pointing sensor to move the selected item to the desired location. 
     According to another embodiment, the present invention is an apparatus having no drag-and-drop utility, the apparatus comprises means for causing to display a list of items on a display screen, a memory for storing code, a processor executing the code to perform operations of: displaying the list on the display screen, wherein the list is scrollable, highlighting at least an item selected to be relocated in the list, relocating the selected item to a desired location in the list in response to a movement of the scroll wheel, and creating an edited list with the item in a different order. 
     One of the objects, features, and advantages of the present invention is to provide mechanisms that can edit or reorder a list of items without using an external controller having the drag-and-drop utility (e.g., a mouse, a joystick, etc.). 
     Other objects, features, and advantages of the present invention will become apparent upon examining the following detailed description of an embodiment thereof, taken in conjunction with the attached drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       These and other features, aspects, and advantages of the present invention will become better understood with regard to the following description, appended claims, and accompanying drawings where: 
         FIG. 1  shows a front view of an Apple iPod® that includes a display screen and a scroll wheel and may be used to implement one embodiment of the present invention; 
         FIG. 2A  shows a front view of an exemplary device in which the present invention is implemented according to one embodiment of the present invention; 
         FIG. 2B  shows that, after a designated key is activated, a highlight bar is displayed and movable by moving a finger clockwise or counterclockwise on a scroll wheel; 
         FIG. 2C  shows that a selected item has been moved right after the item “Love Invincible”; 
         FIG. 2D  shows that a selected item is now positioned after the item “Love Invincible”, which means the user wants the selected item to be played back right after a current item is done; 
         FIG. 3A  and  FIG. 3B  show, respectively, that an ending item (e.g., a first and a list item) is selected, or a beginning or ending of a list has been reached, in which case a direction indicator will be shown to indicate where the selected item could be possibly moved; 
         FIG. 4  illustrates an internal functional block diagram of an exemplary device implementing one embodiment of the present invention; 
         FIG. 5  shows a flowchart of editing a list of items in accordance with one embodiment of the present invention; and 
         FIG. 6  shows an exemplary configuration in which the present invention may be practiced. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The detailed description of the present invention is presented largely in terms of procedures, steps, logic blocks, processing, or other symbolic representations that directly or indirectly resemble the operations of devices or systems that can be used on networks. These descriptions and representations are typically used by those skilled in the art to most effectively convey the substance of their work to others skilled in the art. 
     Reference herein to “one embodiment” or “an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase “in one embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Further, the order of blocks in process flowcharts or diagrams representing one or more embodiments of the invention do not inherently indicate any particular order nor imply any limitations in the invention. 
     Referring now to the drawings, in which like numerals refer to like parts throughout the several views.  FIG. 1  shows a front view of an Apple iPod®  100  that includes a display screen  102  and a scroll wheel  104 . A user may put a finger on the scroll wheel  104  to navigate a list being displayed in the screen  102  by moving the finger clockwise or counterclockwise. An acceleration of the finger movement would control a navigating speed of the list. Because the display screen  102  is relatively small, the list would be made scrollable. When an item in the list is selected, the “OK” click button in the scroll wheel  104  can be activated to play back the selected item. 
       FIG. 2A  shows a front view of an exemplary device  200  in which the present invention is implemented according to one embodiment of the present invention. Although it appears that the device  200  is more sophisticated than an Apple iPod® of  FIG. 1 , it will be appreciated by those skilled in the art that the present invention may be equally implemented in an Apple iPod® or other similar devices. The device  200  includes a display screen  202  and a scroll wheel  204 . As used herein, it is defined that a display screen or a screen is a physical display apparatus in a device, such as the display screen  202  while a screen display or simply a display is an image presented on a display screen. 
     As shown in the figure, the display screen  202  shows that a list (e.g., a queue or playlist) is being activated and one item named “Love Invincible” is being played back (e.g., indicated by an arrow). The display screen  202  also includes a number of soft keys  206 ,  208 , and  210  that can be respectively activated by buttons  207 ,  209 , and  211 . One of the soft keys  208  is labeled as “move track” that can be activated to start editing the list. The soft key  208  may be activated by other means (e.g., a touch screen). 
     One of the features of editing a list in the present invention is the underlying mechanism that allows a user to move any particular item(s) to any position in the list without an external controller such as a mouse. Any of the item(s) may be items that have already been played back, are currently being played, or will be played back in the list. Depending on implementation, any of the items may pertain to, but not limited to, an audio item (e.g., a song or music), a video item (e.g., a movie or footage), or a photo item. These items may be available or provided locally or remotely. 
       FIG. 2B  shows that, after the key  208  is activated, a highlighting bar  220  is displayed and movable by moving a finger clockwise or counterclockwise on the scroll wheel  204 . It is assumed that a user desires to move or change the position of the item named “Yes, I Will” to a different position in the list. Upon moving the highlighting bar  220  to the item named “Yes, I Will”, the highlighted item is selected by, for example, another activation of the key  208 . To indicate possible movements of this highlighted item, a direction indicator  224  is provided. As positioned in the figure, the highlighted item may be moved both ways, hence the direction indicator  224  is shown bidirectional. As will be shown below, there are cases that a highlighted item may be moved only in one direction in which case the direction indicator  224  will be shown accordingly. 
     With the highlighted item being selected, the user may simply delete the item off the list by activating one of the buttons or soft keys or move the item to a desired position of the list.  FIG. 2C  shows that the selected item has been moved right after the item “Love Invincible”. According to one embodiment, the key  208  is changed to “Release” accordingly. If this is the position that the user desires to place the selected item, the key  208  may be activated.  FIG. 2D  shows that, after the key  208  is activated, the selected item is now positioned after the item “Love Invincible”, which means the user wants the selected item to be played back right after the item “Love Invincible” is done. 
     In one embodiment, a designated key or button is provided to undo a selection, a movement or a position of an item in a queue. Depending on where in moving an item in a list, activating an undo button would void an action just performed.  FIG. 2D  shows that a button  230  is designated to perform the undo function. If the button  230  is activated, the just newly positioned item “Yes, I Will” would become movable again. In other words, by moving the finger clockwise or counterclockwise on the scroll wheel  204 , the item “Yes, I Will” may land in another desired location of the list. 
     In some cases, the item that is being moved is the one that is being played. If this is the case, a next item that ends up right after the current item will be automatically played back as soon as the current item is done. In other words, the present invention provides the flexibility of activating a next item(s) by either moving the next item(s) right after the current item or moving the current item just ahead of the next item(s). 
       FIG. 3A  and  FIG. 3B  show, respectively, that an ending item (e.g., a first and a list item) is selected, or a beginning or ending of a list has been reached, in which case a direction indicator will be shown to indicate where the selected item could be possibly moved.  FIG. 3A  shows that a first item of the list is being selected or where a selected item has been moved to. Because the selected item could be now only moved downwards, a downward arrow  302  is displayed so that the user immediately knows that the top of the list has been reached. Likewise,  FIG. 3B  shows an upward arrow indicating that the bottom of the list has been reached. 
       FIG. 4  illustrates an internal functional block diagram of an exemplary device  270  implementing one embodiment of the present invention. The screen  472  on the device  270  may be a LCD screen. The screen  272  communicates with and is commanded by a screen driver  474  that is controlled by a microcontroller (e.g., a processor)  476 . The memory  482  may be loaded with one or more application modules  484  that can be executed by the microcontroller  476  with or without a user input via the user interface  478  to achieve desired tasks. In one embodiment, an application module implementing one embodiment of the present invention and enabling one or more soft keys is loaded in the memory  482 . 
     The device  470  may include a network interface  480  referred to as a RF interface  480  that facilitates wireless communication with another device being controlled by the device  470  via a corresponding wireless interface or RF interface thereof. As a result, items in a queue or a playlist that are located or provided remotely may be accessible. In another embodiment, the screen  472  may be located separately. For example, the screen  472  is part of a display device that may include a display driver while the remaining parts in the device  470  are in a remote control. Through the remote control, items displayed on the screen can be readily managed or edited without the drag-and-drop utility. 
     Referring now to  FIG. 5 , there shows a flowchart  500  of editing a list of items in accordance with one embodiment of the present invention. The flowchart  500  may be implemented in software, hardware or in a combination of both as a method, an apparatus or part of a system. A list, typically containing many items, is displayed in a display screen. It can be appreciated to those skilled in the art that a list can be a collection of any items, each of the items may further contain one or more items. To facilitate the understanding of the present invention, a list is considered a library of songs and each item is a song. The list is otherwise scrollable by a finger pointing sensor (e.g., a scroll wheel, a control strip, or a remote control). 
     At  502 , a user decides to edit the list being displayed on a display screen so that the items in the list will be executed differently in order. In one embodiment, the user proceeds with the editing function by activating a designated button or key, or tapping on a finger pointing sensor that, as a result, produces a highlighting means for the use to select an item to be removed off the list or moved to a different location of the list. The selected item may be one that has already been played back, is currently being played, or will be played back in the list. After determining which item in the list is to be selected, the highlighting means is moved to highlight the item at  504 . After an activation of a designed key or button, or other designated means, the item is selected and now highlighted by the highlighting means. Depending on implementation, the highlighting means may be a highlighting bar or an arrow. According to one embodiment, the highlighting means includes a highlighting bar and a direction indicator, where the highlighting bar allows the user to see a highlighted item easily from other items in the list, and the direction indicator indicates where the selected item could be moved in the list. 
     At  506 , the selected item may be simply deleted off the list, if desired, by activating a designated means (e.g., a key or a button). It is now assumed that the user wants to relocate the selected item. By acting on a scroll wheel, the user can move the selected item to a particular location of the list. At  508 , the user decides whether the selected item is in the desired location. If not, the process  500  goes back to  506 , where the user continues to move the selected item along the list. If the location is the desired location for the selected item, the selected item can be made to settle there by activating a designated means. As a result, an edited list with a different order of the items is created at  510 . 
       FIG. 6  shows an exemplary configuration  600  in which the present invention may be practiced. The configuration may represent, but not be limited to, a part of a residential home, a business building or a complex with multiple zones. There are a number of multimedia players of which three examples  602 ,  604  and  606  are shown as audio devices. Each of the audio devices may be installed or provided in one particular area or zone and hence referred to as a zone player herein. 
     As used herein, unless explicitly stated otherwise, a track and an audio source are used interchangeably, an audio source or audio sources are in digital format and can be transported or streamed across a data network. To facilitate the understanding of the present invention, it is assumed that the configuration  600  represents a home. Thus, the zone player  602  and  604  may be located in two of the bedrooms respectively while the zone player  606  may be installed in a living room. All of the zone players  602 ,  604  and  606  are coupled directly or indirectly to a data network  608 . In addition, a computing device  610  is shown to be coupled on the network  608 . In reality, any other devices such as a home gateway device, a storage device, or an MP3 player may be coupled to the network  608  as well. 
     The network  608  may be a wired network, a wireless network or a combination of both. In one example, all devices including the zone players  602 ,  604  and  606  are coupled to the network  608  by wireless means based on an industry standard such as IEEE 802.11. In yet another example, all devices including the zone players  602 ,  604  and  606  are part of a local area network that communicates with a wide area network (e.g., the Internet). 
     All devices on the network  608  may be configured to download and store audio sources or receive streaming audio sources. For example, the computing device  610  can download audio sources from the Internet and store the downloaded sources locally for sharing with other devices on the Internet or the network  608 . The zone player  606  can be configured to receive streaming audio source and share the source with other devices. Shown as a stereo system, the device  612  is configured to receive an analog source (e.g., from broadcasting) or retrieve a digital source (e.g., from a compact disk). The analog sources can be converted to digital sources. In accordance with the present invention, all audio sources, regardless of where they are located or how they are received, may be shared among the devices on the network  608 . 
     Any device on the network  608  may be configured to control operations of the zone players  602 ,  604  and  606 . As shown, one or more controlling devices  640  and  642  are used to control zone players  602 ,  604  and  606  as shown in  FIG. 6 . The controlling devices  640  and  642  are preferably portable and remotely control the zone players via wireless means (e.g., infrared, radio, wireless standard IEEE 802.11b or 802.11g). In one embodiment, besides controlling an individual zone player, the controlling device  640  or  642  is configured to manage audio sources and other characteristics of all the zone players regardless where the controlling device  640  or  642  is located in a house or a confined complex. 
     A playlist for a particular group of players (e.g., the zone players  602  and  604 ) can be edited in one of the two controlling devices  640  and  642  employing one embodiment of the present invention. The playlist may not be physically residing in one of the two controlling devices  640  and  642 . When a controlling device is used to edit the playlist, the playlist is retrieved into the controlling device and edited as described above. The edited playlist is available to any of the zone players as well as the controlling devices shown in  FIG. 6 . The edited playlist may be further edited in other controlling devices. 
     While the present invention has been described with reference to specific embodiments, the description is illustrative of the invention and is not to be construed as limiting the invention. Various modifications to the present invention can be made to the preferred embodiments by those skilled in the art without departing from the true spirit and scope of the invention as defined by the appended claim. Accordingly, the scope of the present invention is defined by the appended claims rather than the forgoing description of embodiments.